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DigiKam Tutorials & How to...


                                          By : Mohamed Malik
                                         i@mohamedmalik.com
                                       www.mohamedmalik.com


    These tutorials are dedicated to the digiKam team, the digiKam users and most importantly
  everyone who reads my blog. All these tutorials are materials that I have published on my blog.
                Since I have written many I thought it was time that I make a PDF book.


                                                 Enjoy!


  Please note that as I write more articles I will update this book as necessary from time to time.
 Permission is here by granted to share and modify any texts and screen captures that I have used.


                                             Special Thanks
        A very special thanks to the following people, without whom this book will not exist
                                           The Digikam Team
                                              Gilles Caulier
                                              Dmitri Popov




Introduction:


Over the past few years I have been using many image managements applications, these applications
include Google Picasa, DigiKam, Shotwell, F-spot and many other. At least about few months back my
favorite image management application was Google Picasa, even though I still was using digiKam at the
same time, however I never really played much with it. However when Picasa released version number
3.5 they dropped support from the Linux platform, and if I was to continue to use Picasa I had to run it
under wine. This made the change for me, I never liked the idea of running applications under wine, I
only do it when there is no alternative. Nevertheless in the place of Picasa we have a perfect alternative
that has a lot more features than Picasa. So here is my user guide and tutorials about DigiKam. I have
arranged the tutorials in order that I have published on my blog.
Contents


Digikam : Manage your photographs like a professional with the power of open source-------------------3
Reducing Noise Using Digikam-------------------------------------------------------------------------------------------------------4
How to enable fast thumbnail loading in DigiKam---------------------------------------------------------------------------6
How to find duplicate images on Digikam---------------------------------------------------------------------------------------7
Geotag Photos With Digikam---------------------------------------------------------------------------------------------------------9
How to geotag photos in digiKam using Google maps in digiKam 2.0 beta 2------------------------------------11
How to export and import pictures to picasa web using digiKam---------------------------------------------------- 13
How to upload pictures to facebook using digiKam------------------------------------------------------------------------ 15
How to download facebook albums by using digiKam-------------------------------------------------------------------15, 16
Straighten Your Pictures Using Digikam-----------------------------------------------------------------------------------------17
Re-compress Images Using Digikam-----------------------------------------------------------------------------------------------19
Applying Image Effects Using DigiKam------------------------------------------------------------------------------------------21
Creating Calendars Using Digikam------------------------------------------------------------------------------------------------22
Remove Red Eyes From Your Pictures Using DigiKam----------------------------------------------------------------------25
Batch Rename Photos In DigiKam--------------------------------------------------------------------------------------------------28
Batch Convert Your RAW Files Using Digikam---------------------------------------------------------------------------------29
Adding Textures To Your Images Using DigiKam------------------------------------------------------------------------------30
Generating aspect ratio crops in digiKam----------------------------------------------------------------------------------------31
Optimise DigiKam’s Performance---------------------------------------------------------------------------------------------------32
Using The Time-Line View In DigiKam---------------------------------------------------------------------------------------------33
Digikam : Manage your photographs like a professional with the power of open source


Digikam is definitely the best image management tool that is available to Linux users. It support all
major image formats, even RAW files from all major DSLR camera manufactures Canon, Nikon etc..
Nevertheless it can organize collections of photographs in directory-based albums, or dynamic albums
by date, timeline, or by tags. Users can also add captions and ratings to their images, search through
them and save searches for later use. With the plugins they can also export albums to 23hq, Facebook,
Flickr, Gallery2, Google Earth’s KML files, SmugMug, Simpleviewer, burn them on CD, or create web
galleries.


Features
Digikam provides functions for organizing, previewing, downloading and/or deleting images from digital
cameras. Basic auto-transformations can also be deployed on the fly during picture downloading. In
addition, Digikam offers image enhancement tools through its KIPI (KDE Image Plugins Interface)
framework and its own plugins, like red-eye removal, color management, image filters, or special
effects. Digikam is the only free photo management application on Linux that can handle 16 bit/channel
images. Digital Asset Management is the mainstay of digiKam.


The 0.10 version is a hallmark in development as it integrates digiKam in the KDE4/Qt4 desktop
environment, which is now available on all major platforms as Unix-like, OS X and Windows (XP and
Vista). New features are: XMP metadata, DNG format read and write, database file is independent of
photo libraries, enabling remote paths, multiple roots and offline archives, improved database with
many more metadata that can be searched, e.g. camera or lens, Marble integration for geolocation, non-
modal image editor, live search boxes in both sidebars and main window, and many more.


Due to these high end features that are available on Digikam it can even satisfy the most serious
photographers or people who have tons of pictures there collection.


Digikam has two views, one is the default viewer and the other is the editor view. In editor view, users
can edit the picture by using various tools which are available. In this regard, many filter such as artistic,
color paint and emboss are available. By using the editor view users can apply various effects to their
pictures as well.In this manner it can be regarded as a fully fledged replacement for proprietary photo
management tools like Apple’s Aperture and Adobe’s Lightroom


Due to its usefulness and popularity it has been awarded the TUX 2005 and 2008 Readers’ Choice Award
in the category Favorite Digital Photo Management Tool.
Reducing Noise Using Digikam


All DSLR camera’s noise up to some extent, this is most true for entry level and consumer level DSLR
camera’s. Even these cameras have very good ISO performance up to something like ISO 800.


I use a nikon D3000 and its ISO performance is good upto ISO 800. ISO 1600 is good and it can be used in
smaller sizes. However ISO 3200 images are very grainy and noise reduction has to be applied.


If you using digiKam, digiKam has a great noise reduction tool. Double click the image that you want to
reduce images and give a right click > edit, you can even press f4 on the keyboard and it will do the
same thing.
After this you will be presented with the editor view. From here go to enhance and noise reduction and
you will be presented with this window.




Choose from the settings or either you can choose your own settings. Here is a picture of before and
after from my tests. They are much more usable and better looking after the noise reduction has been
applied.
Before Noise Reduction Was Applied




After Noise Reduction Was Applied….
How to enable fast thumbnail loading in DigiKam


One of the things that bothered me during the first few days of using Digikam is that the thumbnail
loading speed was slow. Given that i have been a Picasa user for a long time. Picasa has a thumbnail
loading speed like no other image management software. However this is due to the fact that Picasa is
developed by Google, A multibillion dollar company who has all the money in the world. Neverthless
Digikam can also load thumbnails quite fast, but still not as fast as Picasa.


When you install Digikam for the first time it creates two databases, one for images which carries all the
information about the images in your library and the second for thumbnails. By default thumbnails are
generated as the folders are being accessed. However you can generate the thumbails by using a few
clicks with your mouse.


After installing Digikam and showing it the root folder where you have kept your images it is very
simple. What you need to do is, go to tools and select the option ” Rebuild All Thumbails” and it will give
you two options.




1. Scan –this option will scan for missing thumbnails in your library and generate them.. this process is
fast


2. Rebuild all — this option scans all the images in your collection and generates the thumbnails– this
process is slow and time consuming.


After running one of the above… you will feel that the thumbnails are now loaded almost instantly
when using Digikam. Doing this is great and it increases the performance of Digikam.
How to find duplicate images on Digikam!

At the moment i'm unlocking digiKam’s features one by one and as i'm doing it i would like to share
them with you.


Here is how to filter and locate duplicate images and look alikes on your library. If you are like me and if
you have a huge amounts of pictures in your database then this feature is definitely worth it. However in
order to use them you need to do something first. I tried and tried to find duplicates but couldn't do it
due to this.


First go to tools on digikams tools bar and from there go to “rebuild fingerprints”, just like the
thumbnail generating option that i wrote last night this has two options.




1. Scan… this options scan your library for missing fingerprints… fast.


2. Rebuild all… this options scan all of your images for fingerprints and rebuild them…slow…


When you have done that it is easy to identify duplicates from there. In the left side bar click the the ico
like the wand and you will get 3 options. Here i will talk about the last option “duplicates”. When you do
to the duplicates section you will get a menu like below.. where you will be asked which folder to
search.. choose a folder
Then click the button find duplicates.


When the folder is scanned it will show you pictures on the left hand side that might be duplicates. And
When you select a particular image it will show you the duplicates and look alikes. Here is an example
Geotag Photos With Digikam..

In digiKam, select the photo you want to geotag and choose Image -> Geolocation




This opens the Edit Geographical Coordinates window containing a map. Drag the map with the mouse
and zoom on a specific area to locate the exact place where the photo was taken. Alternatively, you can
use the Search field to enter the address, for example: botanic garden, berlin, germany. Hit then the
Search button, and you should see a list of found places that are marked with pins on the map. To add
geographical coordinates to the photo, click on the exact spot on the map to add a pin to the place
where the photo was taken. You can then drag the pin with the mouse to adjust the pin’s position. Hit
then OK, and you are done.




If you use a GPS device to record your track when shooting photos, you can use digiKam’s Correlator
tool to geotag the images (mapping photos using a GPX file is often called geocorrelation). To do this,
you have to export the recorded track from your GPS unit as a GPX file. In digiKam, select the photos
you want to correlate, choose Image -> Geolocation -> Correlator, then press the Load GPX File button
and select the GPX file. Hit then the Correlate button, and digiKam does the rest. Keep in mind that for
this feature to work properly, the time on your GPS device and digital camera must be in sync. If the
time on both devices differs, you can specify the time gap in the Difference in min[utes] field.

Once you’ve geotagged your photos, you can view them on the map without leaving the convenience of
digiKam. To do this, click on the Geolocation sidebar to expand it, select the photo you want, and you
should see it on the map. digiKam even lets you choose between different map providers, including
Google Maps, OpenStreetMap, and MSN Maps. To switch to the desired map, choose it from the drop-
down list at the bottom of the Geolocation sidebar.




Adapted From : scribblesandsnaps.wordpress.com/2009/11/03/geotagging-photos-with-digikam/
How to geotag photos in digiKam using Google maps in digiKam 2.0 beta 2

I have been unlocking digiKam’s features for sometime now and I am sharing these features with you,
and today i would like to share how to geotag photos in digiKam using Google maps.

At first google maps is on of the most accurate and precise maps that are available to use by the general
public. Digikam has two options when using maps. The first option (default) is the marble virtual globe
which uses the open street map and google maps. Open street map is good and it has many good
features, however it is not just powerful enough compared to google maps, here an understanding is
necessary, it is the fact that google maps is designed by google which is a multi billion dollar company
which has many and resources that openstreetmaps do not have. The only reason that i prefer google
maps over open street map is that the Map of the Maldives is much more complete. In my case my home
town of inguraidhoo and many other places are not included in the open map. And this goes true for
most of the places in remote areas like Maldives. However Google maps contains these remote areas.
Thereby using google maps i can pin point the exact location of my pictures and geotag them more
accurately. Here is how to use it.

On the right hand side of digiKam click the tool maps and change it to google maps. See screen shot
below.
Now go to album view..choose some pictures and go to image> geolocation and the goetag tool will
appear. If that window still contains the marble virtual globe, then change it to google maps. See screen
shot below.




When the map loads drag and drop the images on to the exact location where you want them. Since this
map uses Google maps i believe that in-order to use this feature you have to be connected to the
internet.
How to export and import pictures to picasa web using digiKam

I have been a long time user of Google Picasa…when they released picasa 3.0 for Linux..however since
the release of picasa 3.5 they have officially stopped support for Linux systems saying that due to low
adoption, even in those day i have been using digiKam as well. However ever since then digiKam has
been my first choice of image managers.

If you have a activated your picasa web albums using your google account then you can export and
import pictures to picasa web using digiKam..the processes is very simple.

Exporting Images.

In order to export images to picasa web select the images that you want to export and then go to
export menu on digiKam and the select “Export To Picasaweb”, when you select this option you will be
asked to enter your google account password and username. Once you enter your credentials you will
see a window like this… see below




You can choose to create new albums or either upload into an existing album. You can also select the
the sizes of the files that you want to upload. When you are ready press start upload.

Importing Images…

Importing pictures is also a simple process. Go to import>import from picasa web.

If you have already entered your account information before when you were trying to export the images
digiKam will not ask you for any account information it will be seamless and automatic and you will see
this window.
Select the album you want to download…choose where that album goes to give it a name and click
start download
How to upload pictures to facebook using digiKam

In my recent article i wrote about how to download pictures from facebook using digiKam. Now let us
learn how to upload pictures to facebook using digiKam.

It is simple….select the images that you want to upload and export>export to facebook and you will be
greeted with a new window where you will be asked to log on to facebook. Follow the on-screen
instructions and you will see this window.




As you can see the process is very easy and straight forward. You can create a new album give it a name.
And choose to resize the pictures into the size that you prefer and can even alter the JPG quality
settings. When you are done just press start upload.


How to download facebook albums by using digiKam



Need to download facebook albums of you or your friends. You dont need so save each and every image
individually. Well in that case digiKam has got you covered. It is easy and fast here is how to do it.

Go to import and select import from facebook.

When you press it you will be asked to log in to your facebook acount or either link your facebook
account with Digikam. Your webbrowser will pop up and give it permission to connect. Then you will be
greeted with this window.
Here you can choose to download your own album or your friends album. If you choose your album then
when you click the menu named album you will see all the albums uploaded by you. If you choose to
download a friends album, then choose the name of your friend and then select the album you want to
download. As you can see on the screen shot.. you need to specify where you want to download the
photos. Select the location on your albums and and select “new album” and give it a name. And press
“start download” it will download the pictures that you have selected.
Straighten Your Pictures Using Digikam

Do you have any images where the horizon is is not straight. In my case i have many. In that case you can
straighten them using digiKam. Here is how to do it.

Take a look at this picture….in definitely needs it…




From the view picture either press f4 or right click on the picture and press edit to go to the editor
view

From the editor view go to transform>free rotation
The you will see this window…take a look at the right…




On the right you can see the menu… as main angle and fine angle…change these and you will see
effects in real time…alter these values until you have straighten your image. Here is what i got.
Re-compress Images Using Digikam

Many people argue that pictures should always be taken using the highest JPEG setting available,
however I am someone who doesn’t believe it due to many reasons.

When im shooting pictures of friends and family and other normal occasions I always keep the JPEG
setting at the basic level. In this case we have several factors that has to be taken into account. I’m not
an expert in the field of photography, however this is just my personal opinion. Most cameras has JPEG
settings FINE, NORMAL & BASIC. JPEG is a lossy format meaning it is compressed. However the main
difference between JPEG FINE and all other options is that each compression eliminates colors which
are not visible to the human eye.

If I’m shooting JPEG fine then I can only shoot 2300 pictures into my 16GB memory card, however at the
basic setting I can shoot 8200 pictures in the same card. For me storage matters and there is no need to
shoot that high quality images when they all look the same on the computer. We only need that quality
if we are printing each and every image to a canvas, other than that I see no need.

Digikam gives you the option to re-compress your images. This is useful if you have many JPEG pictures
with JPEG setting fine ( on scale 0-100). Changing the scale from 100 to 85 can significantly reduce the
file-size & look the same.

Example : A 3.1 MB file at JPEG setting 100. When this image was re-compressed to a quality of 85 the
image size came just 1MB.


Meaning hundred similar file will have a total of 310MB, when these hundred pictures are re-
compressed to a scale of 85 you will get approximately 100Mb, in the meantime saving 210MB of hard
drive space. If you have many images like I do and if you need to convert these images it will saves GB’s
of hard-drive space.

To re-compress your files using digiKam go to Tools>Recompress Images and a wizard will pop up.
Then click options. By default digiKam has a compression level of 75, change this setting as you wish.
Please bear in mind that when you move the scale beyond 75 it will show degrade in image quality. In my
personal opinion a value of 75-85 is most adequate.




The same has JPEG files it can do the same for other file formats such as TIFF and PNG’s as well. Choose
either to remove the original or to keep it. If you are doing this for the first time, I advice you to keep
your original and later take a look yourself and delete them if you wish.

Note : This is just my personal opinion regarding image compression and quality. 75% of the images in my
flickr photostream ( http://www.flickr.com/photos/malikdhadha) has been shot by the camera at BASIC
default setting. I only shoot high quality on when needed.
Applying Image Effects Using DigiKam

Digikam can apply various image effects to images as a batch process. To do this go to tools menu and
select apply image effects.




It gives you a few option for an example on the above screen shot the specified image effect to be
applied is “charcoal”, however that is not the only effect that is available. The screen shot below shows
several effects which can be applied.




Choose any image effect from the list. If you want to adjust the settings press the options button on the
left. I have chosen “paint”. When you are done press the preview button which give a glint of what you
will get after the process is done. Example see screen shot below. If you click “remove original” option in
the window your original files will be deleted. It is a better option to leave this off, since digiKam will
create a new modified file, thereby leaving your original files untouched.
Creating Calendars Using Digikam

Did you know that you could create calendars using digiKam. It is very simple and easy to do this. First
you need to select some photos, most preferably 12 photos so that those 12 photos corresponds to 12
months in the calendar.




After selecting the picture go to Tools> Create Calendar.

When you do this this window will appear.




Here you can alter your settings.
Paper size : you have two choices standard A4 and US Letter size.
Image position : set which position in which the images appear in the calendar.
Draw law on calendar : meaning that you can either disable or enable the lines which appear/
Image to text ration : Increase the size of the image or decrease them according to the ratio, move the
slider and the preview will change as you adjust it.
Set your font : choose a default font to be used.
When you have completed this click next in the wizard and you will be greeted with this window.




The website http://www.icalshare.com has many great templates that can be used. It is free to use and
download all you need to do is register and account with them. It includes templates which contain
many information on public holidays and events of many countries. I searched this website for Maldives,
however I didn’t find anything about my country here so I skipped this.

If you are using Korganizer to organise your daily work and if you have marked special days like birthdays
of friends and relatives you could really use this feature. And it is a very simple process. Open up
korganizer go to file> export>calendar and save the calendar file on to your computer. Then select the
folder button on the current screen-shot and show it to the file manager and select open. This will add
that to your calendar. Then press next in the wizard. And you will see this window.
Here you need to select the year and images. Since this is 2011 I have chosen 2011 and if you still want
to change any images you still have the option to do it. Left click to change the image and the file
manager will pop up show it the new image and press open. If you need to clear an image give it a right
click and the image will be cleared. And you can add any other image that you may prefer. When you are
done press next.

You can either send it directly to your printer or print to a PDF file. However according to my personal
opinion it will be a wise decision to print to PDF first so that you can see what you have created. If you
need to change the printer properties press “properties” here you will be able to change the page
layout ( portrait, landscape) and the units of measurements( cm, inches px etc). By default the output
file will be made in your home folder. If you need to change the location press the button on the right
and specify manually.




When you are done press print and it will generate a 12 page PDF file exactly like a calendar.
Remove Red Eyes From Your Pictures Using DigiKam




Take a look at the picture above the eyes are blood red and the eyes look like one of those vampires,
that we see in the movie twilight and it needs to be corrected. Most of the red eyes occur into pictures
while using the flash. Most camera’s come with an option to correct red eyes by default however even
that fails to work some times. In either case you have nothing to worry about, digiKam has you covered.

Select the pictures that you want to remove red eyes from and then go to Tools>Red-Eye Removal

From there you will see this window. Here you have two tabs one is the file list.




And the other is settings, remember it is very important to take a look at this window and understand it
before proceeding.
It gives you many options on the left hand-side

Slower…. removes red eyes better but process is slower

Standard….the standard setting are applied

Faster…means the process is faster…..i personally didn’t get good results with this option

On the right hand side

It gives you the option about how to rename the files. When red eye reduction is applied to a file it
creates a new file. You can add a prefix or a suffice or choose from the other options that are available.



Example : if you choose prefix...

If the original had a file name “malik.jpg” then the corrected file will have the following name “
malikcorrected.jpg” if you choose suffix then the vice versa.

If an image cannot be processed, which basically means that, red eyes cannot be removed it gives the
user a few options, first one being ask the user then keep the file in the list or remove the file in the list.
I have processed many files and no such thing has occurred to me so I leave it at ask the user.

On the right hand side you can see a button named “advanced mode” click this if you want to go
advanced and you will be presented with the following window. You can use these setting to make more
adjustments. When you are done adjusting click correct photos.




This is not the only way to remove red eyes using digiKam…this option is very useful when you want red
eyes to be removed from many pictures at once. However if you think you should do them individually
select the image and press f4 and this will take you to editor view. From there select the part where the
eyes are red and got to enhance>red eye

Remember the picture in the top of the article here is the corrected photo…..hmm the eyes no longer
look like the ones we see it twilight!!
Before..




After..
Batch Rename Photos In DigiKam

I am someone who is very serious when it comes to file management issues. Many of my friends keep
there entire data on the desktop, i have advised them many times to do use the file-manager effectively.
I keep my pictures in a folder named ” my pictures” in a separate partition and within that folder i have
several subfolders like this..

Friends, Family, College etc…

Within each sub folder i create new sub folders can create the name related with this. For Example :
Yesterday I shot our college six a side foot ball tournament..so the name of the folder within college
folder goes like this…

College – Feb 19th 2011 Faculty Of Education Football…

When i do this it becomes easy to find when needed. And i also rename the files too rather than keeping
files like DSC0215 or something like that. Basically means that keep the file names related to the event
as well to keep it better organised. If we dont organise these files then what is the need of file-
managers and picture managers. The sole purpose of these is to keep your files organized.

If you want to batch rename pictures in digikam, it is very simple, digiKam’s main user interface has this
button by default. see screen capture below. Select the images you need to rename and click it.




then you will see this window…




Choose from the options when you are done…click ok.
Batch Convert Your RAW Files Using Digikam

Do you have a lot of RAW files that need to be converted?

If you do Digikam has got you covered and this saves a lot of time. As for me i don’t have time to process
each and every image separately. Here is how to convert them seamlessly and easily.

Select the RAW files and go to Tools> Batch RAW Converter and the this wizard will pop-up.



The wizard gives you to choose from the following settings..




—8 bits or 16bits

–White balance

–Exposure correction, brightness

–Noise reduction, chromatic abberation correction

–colour management

–various out put file formats such has PNG, JPEG, TIFF & PPM

Remember you can alter each and every one of those settings.. when you are done applying your
personal touches to the images just click convert on the menu and digiKam will do the rest.
Adding Textures To Your Images Using DigiKam

Many people add textures to there images which produces very good results most of the time. If you
want to apply textures to your image it is simple and easy. Select the image you want to add texture to
and press F4 on the keyboard this will take you to editor view.

From the editor view go to Decorate> Apply Texture




On the right hand side you will see the texture options available, and another option called “relief”, you
can using that option to control the amount of texture that you are applying for the texture that you
choose.
Generating aspect ratio crops in digiKam

Each and every monitor has an aspect ratio, which the ratio of the width versus the height, digiKam can
produce these crops very easily. This is very useful if you are creating wallpapers and images to fit a
certain ratio, i use this feature when i upload my wallpapers to kde-look.org

Here is how to create them..

Choose the image and click f4 or right click on the image and go to edit. In the editor view to the menu
bar and click transform> aspect ratio crop and this window will appear.




The tool has the following predefined ratios, they are

1:1

3:2

4:3

5:4

7:5

10:7 & 5:8

It also has an option named golden aspect ratio… i still haven't figured out what it does or what it
means!

It also give the option of custom aspect ratio. Therefore you can choose any ratio that you may prefer.

After choosing an aspect ratio hold the tiny square that you see on the edges of the highlighted area
and move to the area of the image that you want to crop any area you select will have the aspect that
you specified.
Optimise DigiKam’s Performance

There are a few things that you can do inorder to optimise the performance of digiKam when you are
using it for the first time.

1. Rebuild All Thumbnails... When digiKam starts it loads the thumbnails when ever an album is opened,
most of the time this takes sometime, however you can solve this issue by generating thumbnails. To do
this go to Tools> Rebuild All Thumbnails. Depending on the amount of images on your collection this
will take sometime.

2. Rebuild All Finger Prints…..This option is a must if you want to search your images for duplicates or if
you want to enable fuzzy searches. To do this go to Tools> Rebuild Finger Prints.

3. Disable Scanning For New Images At Start up… By default digiKam scans your collections for new
images. If you feel digiKam is slow when starting up disable this option.

To do this go to Setting>Configure digiKam, when the window opens go to the last option named
miscellaneous and disable it. See screen capture below..




These options will definitely improve performance and will give you a much more pleasant experience
with digiKam…
Using The Time-Line View In DigiKam

DigiKam comes with some useful features and among them is the time-line view. Where it shows the
images according to days, weeks, months and year. This is useful when you are trying to find a picture
that was taken at a certain date.

Click on the time-line view and the following window will appear.




In the screen capture I’m asking digiKam to display my images according to the month. So it displays the
months. If you take a closer look you can see that below the bar graph it has some letter “J” and “F”,
here J stands for January and F for February. Meaning that it will display images taken during the month
selected. Here the year is divided into months within the time line. When you are done selecting the
month click on the red dotted square that you see surrounding the month. It will display all the images
taken during January 2011. And it also gives you the total number of pictures taken in January 2011. It
shows that i have taken 2947 picture in that month.

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Digikam

  • 1. DigiKam Tutorials & How to... By : Mohamed Malik i@mohamedmalik.com www.mohamedmalik.com These tutorials are dedicated to the digiKam team, the digiKam users and most importantly everyone who reads my blog. All these tutorials are materials that I have published on my blog. Since I have written many I thought it was time that I make a PDF book. Enjoy! Please note that as I write more articles I will update this book as necessary from time to time. Permission is here by granted to share and modify any texts and screen captures that I have used. Special Thanks A very special thanks to the following people, without whom this book will not exist The Digikam Team Gilles Caulier Dmitri Popov Introduction: Over the past few years I have been using many image managements applications, these applications include Google Picasa, DigiKam, Shotwell, F-spot and many other. At least about few months back my favorite image management application was Google Picasa, even though I still was using digiKam at the same time, however I never really played much with it. However when Picasa released version number 3.5 they dropped support from the Linux platform, and if I was to continue to use Picasa I had to run it under wine. This made the change for me, I never liked the idea of running applications under wine, I only do it when there is no alternative. Nevertheless in the place of Picasa we have a perfect alternative that has a lot more features than Picasa. So here is my user guide and tutorials about DigiKam. I have arranged the tutorials in order that I have published on my blog.
  • 2. Contents Digikam : Manage your photographs like a professional with the power of open source-------------------3 Reducing Noise Using Digikam-------------------------------------------------------------------------------------------------------4 How to enable fast thumbnail loading in DigiKam---------------------------------------------------------------------------6 How to find duplicate images on Digikam---------------------------------------------------------------------------------------7 Geotag Photos With Digikam---------------------------------------------------------------------------------------------------------9 How to geotag photos in digiKam using Google maps in digiKam 2.0 beta 2------------------------------------11 How to export and import pictures to picasa web using digiKam---------------------------------------------------- 13 How to upload pictures to facebook using digiKam------------------------------------------------------------------------ 15 How to download facebook albums by using digiKam-------------------------------------------------------------------15, 16 Straighten Your Pictures Using Digikam-----------------------------------------------------------------------------------------17 Re-compress Images Using Digikam-----------------------------------------------------------------------------------------------19 Applying Image Effects Using DigiKam------------------------------------------------------------------------------------------21 Creating Calendars Using Digikam------------------------------------------------------------------------------------------------22 Remove Red Eyes From Your Pictures Using DigiKam----------------------------------------------------------------------25 Batch Rename Photos In DigiKam--------------------------------------------------------------------------------------------------28 Batch Convert Your RAW Files Using Digikam---------------------------------------------------------------------------------29 Adding Textures To Your Images Using DigiKam------------------------------------------------------------------------------30 Generating aspect ratio crops in digiKam----------------------------------------------------------------------------------------31 Optimise DigiKam’s Performance---------------------------------------------------------------------------------------------------32 Using The Time-Line View In DigiKam---------------------------------------------------------------------------------------------33
  • 3. Digikam : Manage your photographs like a professional with the power of open source Digikam is definitely the best image management tool that is available to Linux users. It support all major image formats, even RAW files from all major DSLR camera manufactures Canon, Nikon etc.. Nevertheless it can organize collections of photographs in directory-based albums, or dynamic albums by date, timeline, or by tags. Users can also add captions and ratings to their images, search through them and save searches for later use. With the plugins they can also export albums to 23hq, Facebook, Flickr, Gallery2, Google Earth’s KML files, SmugMug, Simpleviewer, burn them on CD, or create web galleries. Features Digikam provides functions for organizing, previewing, downloading and/or deleting images from digital cameras. Basic auto-transformations can also be deployed on the fly during picture downloading. In addition, Digikam offers image enhancement tools through its KIPI (KDE Image Plugins Interface) framework and its own plugins, like red-eye removal, color management, image filters, or special effects. Digikam is the only free photo management application on Linux that can handle 16 bit/channel images. Digital Asset Management is the mainstay of digiKam. The 0.10 version is a hallmark in development as it integrates digiKam in the KDE4/Qt4 desktop environment, which is now available on all major platforms as Unix-like, OS X and Windows (XP and Vista). New features are: XMP metadata, DNG format read and write, database file is independent of photo libraries, enabling remote paths, multiple roots and offline archives, improved database with many more metadata that can be searched, e.g. camera or lens, Marble integration for geolocation, non- modal image editor, live search boxes in both sidebars and main window, and many more. Due to these high end features that are available on Digikam it can even satisfy the most serious photographers or people who have tons of pictures there collection. Digikam has two views, one is the default viewer and the other is the editor view. In editor view, users can edit the picture by using various tools which are available. In this regard, many filter such as artistic, color paint and emboss are available. By using the editor view users can apply various effects to their pictures as well.In this manner it can be regarded as a fully fledged replacement for proprietary photo management tools like Apple’s Aperture and Adobe’s Lightroom Due to its usefulness and popularity it has been awarded the TUX 2005 and 2008 Readers’ Choice Award in the category Favorite Digital Photo Management Tool.
  • 4. Reducing Noise Using Digikam All DSLR camera’s noise up to some extent, this is most true for entry level and consumer level DSLR camera’s. Even these cameras have very good ISO performance up to something like ISO 800. I use a nikon D3000 and its ISO performance is good upto ISO 800. ISO 1600 is good and it can be used in smaller sizes. However ISO 3200 images are very grainy and noise reduction has to be applied. If you using digiKam, digiKam has a great noise reduction tool. Double click the image that you want to reduce images and give a right click > edit, you can even press f4 on the keyboard and it will do the same thing. After this you will be presented with the editor view. From here go to enhance and noise reduction and you will be presented with this window. Choose from the settings or either you can choose your own settings. Here is a picture of before and after from my tests. They are much more usable and better looking after the noise reduction has been applied.
  • 5. Before Noise Reduction Was Applied After Noise Reduction Was Applied….
  • 6. How to enable fast thumbnail loading in DigiKam One of the things that bothered me during the first few days of using Digikam is that the thumbnail loading speed was slow. Given that i have been a Picasa user for a long time. Picasa has a thumbnail loading speed like no other image management software. However this is due to the fact that Picasa is developed by Google, A multibillion dollar company who has all the money in the world. Neverthless Digikam can also load thumbnails quite fast, but still not as fast as Picasa. When you install Digikam for the first time it creates two databases, one for images which carries all the information about the images in your library and the second for thumbnails. By default thumbnails are generated as the folders are being accessed. However you can generate the thumbails by using a few clicks with your mouse. After installing Digikam and showing it the root folder where you have kept your images it is very simple. What you need to do is, go to tools and select the option ” Rebuild All Thumbails” and it will give you two options. 1. Scan –this option will scan for missing thumbnails in your library and generate them.. this process is fast 2. Rebuild all — this option scans all the images in your collection and generates the thumbnails– this process is slow and time consuming. After running one of the above… you will feel that the thumbnails are now loaded almost instantly when using Digikam. Doing this is great and it increases the performance of Digikam.
  • 7. How to find duplicate images on Digikam! At the moment i'm unlocking digiKam’s features one by one and as i'm doing it i would like to share them with you. Here is how to filter and locate duplicate images and look alikes on your library. If you are like me and if you have a huge amounts of pictures in your database then this feature is definitely worth it. However in order to use them you need to do something first. I tried and tried to find duplicates but couldn't do it due to this. First go to tools on digikams tools bar and from there go to “rebuild fingerprints”, just like the thumbnail generating option that i wrote last night this has two options. 1. Scan… this options scan your library for missing fingerprints… fast. 2. Rebuild all… this options scan all of your images for fingerprints and rebuild them…slow… When you have done that it is easy to identify duplicates from there. In the left side bar click the the ico like the wand and you will get 3 options. Here i will talk about the last option “duplicates”. When you do to the duplicates section you will get a menu like below.. where you will be asked which folder to search.. choose a folder
  • 8. Then click the button find duplicates. When the folder is scanned it will show you pictures on the left hand side that might be duplicates. And When you select a particular image it will show you the duplicates and look alikes. Here is an example
  • 9. Geotag Photos With Digikam.. In digiKam, select the photo you want to geotag and choose Image -> Geolocation This opens the Edit Geographical Coordinates window containing a map. Drag the map with the mouse and zoom on a specific area to locate the exact place where the photo was taken. Alternatively, you can use the Search field to enter the address, for example: botanic garden, berlin, germany. Hit then the Search button, and you should see a list of found places that are marked with pins on the map. To add geographical coordinates to the photo, click on the exact spot on the map to add a pin to the place where the photo was taken. You can then drag the pin with the mouse to adjust the pin’s position. Hit then OK, and you are done. If you use a GPS device to record your track when shooting photos, you can use digiKam’s Correlator tool to geotag the images (mapping photos using a GPX file is often called geocorrelation). To do this, you have to export the recorded track from your GPS unit as a GPX file. In digiKam, select the photos
  • 10. you want to correlate, choose Image -> Geolocation -> Correlator, then press the Load GPX File button and select the GPX file. Hit then the Correlate button, and digiKam does the rest. Keep in mind that for this feature to work properly, the time on your GPS device and digital camera must be in sync. If the time on both devices differs, you can specify the time gap in the Difference in min[utes] field. Once you’ve geotagged your photos, you can view them on the map without leaving the convenience of digiKam. To do this, click on the Geolocation sidebar to expand it, select the photo you want, and you should see it on the map. digiKam even lets you choose between different map providers, including Google Maps, OpenStreetMap, and MSN Maps. To switch to the desired map, choose it from the drop- down list at the bottom of the Geolocation sidebar. Adapted From : scribblesandsnaps.wordpress.com/2009/11/03/geotagging-photos-with-digikam/
  • 11. How to geotag photos in digiKam using Google maps in digiKam 2.0 beta 2 I have been unlocking digiKam’s features for sometime now and I am sharing these features with you, and today i would like to share how to geotag photos in digiKam using Google maps. At first google maps is on of the most accurate and precise maps that are available to use by the general public. Digikam has two options when using maps. The first option (default) is the marble virtual globe which uses the open street map and google maps. Open street map is good and it has many good features, however it is not just powerful enough compared to google maps, here an understanding is necessary, it is the fact that google maps is designed by google which is a multi billion dollar company which has many and resources that openstreetmaps do not have. The only reason that i prefer google maps over open street map is that the Map of the Maldives is much more complete. In my case my home town of inguraidhoo and many other places are not included in the open map. And this goes true for most of the places in remote areas like Maldives. However Google maps contains these remote areas. Thereby using google maps i can pin point the exact location of my pictures and geotag them more accurately. Here is how to use it. On the right hand side of digiKam click the tool maps and change it to google maps. See screen shot below.
  • 12. Now go to album view..choose some pictures and go to image> geolocation and the goetag tool will appear. If that window still contains the marble virtual globe, then change it to google maps. See screen shot below. When the map loads drag and drop the images on to the exact location where you want them. Since this map uses Google maps i believe that in-order to use this feature you have to be connected to the internet.
  • 13. How to export and import pictures to picasa web using digiKam I have been a long time user of Google Picasa…when they released picasa 3.0 for Linux..however since the release of picasa 3.5 they have officially stopped support for Linux systems saying that due to low adoption, even in those day i have been using digiKam as well. However ever since then digiKam has been my first choice of image managers. If you have a activated your picasa web albums using your google account then you can export and import pictures to picasa web using digiKam..the processes is very simple. Exporting Images. In order to export images to picasa web select the images that you want to export and then go to export menu on digiKam and the select “Export To Picasaweb”, when you select this option you will be asked to enter your google account password and username. Once you enter your credentials you will see a window like this… see below You can choose to create new albums or either upload into an existing album. You can also select the the sizes of the files that you want to upload. When you are ready press start upload. Importing Images… Importing pictures is also a simple process. Go to import>import from picasa web. If you have already entered your account information before when you were trying to export the images digiKam will not ask you for any account information it will be seamless and automatic and you will see this window.
  • 14. Select the album you want to download…choose where that album goes to give it a name and click start download
  • 15. How to upload pictures to facebook using digiKam In my recent article i wrote about how to download pictures from facebook using digiKam. Now let us learn how to upload pictures to facebook using digiKam. It is simple….select the images that you want to upload and export>export to facebook and you will be greeted with a new window where you will be asked to log on to facebook. Follow the on-screen instructions and you will see this window. As you can see the process is very easy and straight forward. You can create a new album give it a name. And choose to resize the pictures into the size that you prefer and can even alter the JPG quality settings. When you are done just press start upload. How to download facebook albums by using digiKam Need to download facebook albums of you or your friends. You dont need so save each and every image individually. Well in that case digiKam has got you covered. It is easy and fast here is how to do it. Go to import and select import from facebook. When you press it you will be asked to log in to your facebook acount or either link your facebook account with Digikam. Your webbrowser will pop up and give it permission to connect. Then you will be greeted with this window.
  • 16. Here you can choose to download your own album or your friends album. If you choose your album then when you click the menu named album you will see all the albums uploaded by you. If you choose to download a friends album, then choose the name of your friend and then select the album you want to download. As you can see on the screen shot.. you need to specify where you want to download the photos. Select the location on your albums and and select “new album” and give it a name. And press “start download” it will download the pictures that you have selected.
  • 17. Straighten Your Pictures Using Digikam Do you have any images where the horizon is is not straight. In my case i have many. In that case you can straighten them using digiKam. Here is how to do it. Take a look at this picture….in definitely needs it… From the view picture either press f4 or right click on the picture and press edit to go to the editor view From the editor view go to transform>free rotation
  • 18. The you will see this window…take a look at the right… On the right you can see the menu… as main angle and fine angle…change these and you will see effects in real time…alter these values until you have straighten your image. Here is what i got.
  • 19. Re-compress Images Using Digikam Many people argue that pictures should always be taken using the highest JPEG setting available, however I am someone who doesn’t believe it due to many reasons. When im shooting pictures of friends and family and other normal occasions I always keep the JPEG setting at the basic level. In this case we have several factors that has to be taken into account. I’m not an expert in the field of photography, however this is just my personal opinion. Most cameras has JPEG settings FINE, NORMAL & BASIC. JPEG is a lossy format meaning it is compressed. However the main difference between JPEG FINE and all other options is that each compression eliminates colors which are not visible to the human eye. If I’m shooting JPEG fine then I can only shoot 2300 pictures into my 16GB memory card, however at the basic setting I can shoot 8200 pictures in the same card. For me storage matters and there is no need to shoot that high quality images when they all look the same on the computer. We only need that quality if we are printing each and every image to a canvas, other than that I see no need. Digikam gives you the option to re-compress your images. This is useful if you have many JPEG pictures with JPEG setting fine ( on scale 0-100). Changing the scale from 100 to 85 can significantly reduce the file-size & look the same. Example : A 3.1 MB file at JPEG setting 100. When this image was re-compressed to a quality of 85 the image size came just 1MB. Meaning hundred similar file will have a total of 310MB, when these hundred pictures are re- compressed to a scale of 85 you will get approximately 100Mb, in the meantime saving 210MB of hard drive space. If you have many images like I do and if you need to convert these images it will saves GB’s of hard-drive space. To re-compress your files using digiKam go to Tools>Recompress Images and a wizard will pop up.
  • 20. Then click options. By default digiKam has a compression level of 75, change this setting as you wish. Please bear in mind that when you move the scale beyond 75 it will show degrade in image quality. In my personal opinion a value of 75-85 is most adequate. The same has JPEG files it can do the same for other file formats such as TIFF and PNG’s as well. Choose either to remove the original or to keep it. If you are doing this for the first time, I advice you to keep your original and later take a look yourself and delete them if you wish. Note : This is just my personal opinion regarding image compression and quality. 75% of the images in my flickr photostream ( http://www.flickr.com/photos/malikdhadha) has been shot by the camera at BASIC default setting. I only shoot high quality on when needed.
  • 21. Applying Image Effects Using DigiKam Digikam can apply various image effects to images as a batch process. To do this go to tools menu and select apply image effects. It gives you a few option for an example on the above screen shot the specified image effect to be applied is “charcoal”, however that is not the only effect that is available. The screen shot below shows several effects which can be applied. Choose any image effect from the list. If you want to adjust the settings press the options button on the left. I have chosen “paint”. When you are done press the preview button which give a glint of what you will get after the process is done. Example see screen shot below. If you click “remove original” option in the window your original files will be deleted. It is a better option to leave this off, since digiKam will create a new modified file, thereby leaving your original files untouched.
  • 22. Creating Calendars Using Digikam Did you know that you could create calendars using digiKam. It is very simple and easy to do this. First you need to select some photos, most preferably 12 photos so that those 12 photos corresponds to 12 months in the calendar. After selecting the picture go to Tools> Create Calendar. When you do this this window will appear. Here you can alter your settings. Paper size : you have two choices standard A4 and US Letter size. Image position : set which position in which the images appear in the calendar. Draw law on calendar : meaning that you can either disable or enable the lines which appear/ Image to text ration : Increase the size of the image or decrease them according to the ratio, move the slider and the preview will change as you adjust it. Set your font : choose a default font to be used.
  • 23. When you have completed this click next in the wizard and you will be greeted with this window. The website http://www.icalshare.com has many great templates that can be used. It is free to use and download all you need to do is register and account with them. It includes templates which contain many information on public holidays and events of many countries. I searched this website for Maldives, however I didn’t find anything about my country here so I skipped this. If you are using Korganizer to organise your daily work and if you have marked special days like birthdays of friends and relatives you could really use this feature. And it is a very simple process. Open up korganizer go to file> export>calendar and save the calendar file on to your computer. Then select the folder button on the current screen-shot and show it to the file manager and select open. This will add that to your calendar. Then press next in the wizard. And you will see this window.
  • 24. Here you need to select the year and images. Since this is 2011 I have chosen 2011 and if you still want to change any images you still have the option to do it. Left click to change the image and the file manager will pop up show it the new image and press open. If you need to clear an image give it a right click and the image will be cleared. And you can add any other image that you may prefer. When you are done press next. You can either send it directly to your printer or print to a PDF file. However according to my personal opinion it will be a wise decision to print to PDF first so that you can see what you have created. If you need to change the printer properties press “properties” here you will be able to change the page layout ( portrait, landscape) and the units of measurements( cm, inches px etc). By default the output file will be made in your home folder. If you need to change the location press the button on the right and specify manually. When you are done press print and it will generate a 12 page PDF file exactly like a calendar.
  • 25. Remove Red Eyes From Your Pictures Using DigiKam Take a look at the picture above the eyes are blood red and the eyes look like one of those vampires, that we see in the movie twilight and it needs to be corrected. Most of the red eyes occur into pictures while using the flash. Most camera’s come with an option to correct red eyes by default however even that fails to work some times. In either case you have nothing to worry about, digiKam has you covered. Select the pictures that you want to remove red eyes from and then go to Tools>Red-Eye Removal From there you will see this window. Here you have two tabs one is the file list. And the other is settings, remember it is very important to take a look at this window and understand it before proceeding.
  • 26. It gives you many options on the left hand-side Slower…. removes red eyes better but process is slower Standard….the standard setting are applied Faster…means the process is faster…..i personally didn’t get good results with this option On the right hand side It gives you the option about how to rename the files. When red eye reduction is applied to a file it creates a new file. You can add a prefix or a suffice or choose from the other options that are available. Example : if you choose prefix... If the original had a file name “malik.jpg” then the corrected file will have the following name “ malikcorrected.jpg” if you choose suffix then the vice versa. If an image cannot be processed, which basically means that, red eyes cannot be removed it gives the user a few options, first one being ask the user then keep the file in the list or remove the file in the list. I have processed many files and no such thing has occurred to me so I leave it at ask the user. On the right hand side you can see a button named “advanced mode” click this if you want to go advanced and you will be presented with the following window. You can use these setting to make more adjustments. When you are done adjusting click correct photos. This is not the only way to remove red eyes using digiKam…this option is very useful when you want red eyes to be removed from many pictures at once. However if you think you should do them individually select the image and press f4 and this will take you to editor view. From there select the part where the eyes are red and got to enhance>red eye Remember the picture in the top of the article here is the corrected photo…..hmm the eyes no longer look like the ones we see it twilight!!
  • 28. Batch Rename Photos In DigiKam I am someone who is very serious when it comes to file management issues. Many of my friends keep there entire data on the desktop, i have advised them many times to do use the file-manager effectively. I keep my pictures in a folder named ” my pictures” in a separate partition and within that folder i have several subfolders like this.. Friends, Family, College etc… Within each sub folder i create new sub folders can create the name related with this. For Example : Yesterday I shot our college six a side foot ball tournament..so the name of the folder within college folder goes like this… College – Feb 19th 2011 Faculty Of Education Football… When i do this it becomes easy to find when needed. And i also rename the files too rather than keeping files like DSC0215 or something like that. Basically means that keep the file names related to the event as well to keep it better organised. If we dont organise these files then what is the need of file- managers and picture managers. The sole purpose of these is to keep your files organized. If you want to batch rename pictures in digikam, it is very simple, digiKam’s main user interface has this button by default. see screen capture below. Select the images you need to rename and click it. then you will see this window… Choose from the options when you are done…click ok.
  • 29. Batch Convert Your RAW Files Using Digikam Do you have a lot of RAW files that need to be converted? If you do Digikam has got you covered and this saves a lot of time. As for me i don’t have time to process each and every image separately. Here is how to convert them seamlessly and easily. Select the RAW files and go to Tools> Batch RAW Converter and the this wizard will pop-up. The wizard gives you to choose from the following settings.. —8 bits or 16bits –White balance –Exposure correction, brightness –Noise reduction, chromatic abberation correction –colour management –various out put file formats such has PNG, JPEG, TIFF & PPM Remember you can alter each and every one of those settings.. when you are done applying your personal touches to the images just click convert on the menu and digiKam will do the rest.
  • 30. Adding Textures To Your Images Using DigiKam Many people add textures to there images which produces very good results most of the time. If you want to apply textures to your image it is simple and easy. Select the image you want to add texture to and press F4 on the keyboard this will take you to editor view. From the editor view go to Decorate> Apply Texture On the right hand side you will see the texture options available, and another option called “relief”, you can using that option to control the amount of texture that you are applying for the texture that you choose.
  • 31. Generating aspect ratio crops in digiKam Each and every monitor has an aspect ratio, which the ratio of the width versus the height, digiKam can produce these crops very easily. This is very useful if you are creating wallpapers and images to fit a certain ratio, i use this feature when i upload my wallpapers to kde-look.org Here is how to create them.. Choose the image and click f4 or right click on the image and go to edit. In the editor view to the menu bar and click transform> aspect ratio crop and this window will appear. The tool has the following predefined ratios, they are 1:1 3:2 4:3 5:4 7:5 10:7 & 5:8 It also has an option named golden aspect ratio… i still haven't figured out what it does or what it means! It also give the option of custom aspect ratio. Therefore you can choose any ratio that you may prefer. After choosing an aspect ratio hold the tiny square that you see on the edges of the highlighted area and move to the area of the image that you want to crop any area you select will have the aspect that you specified.
  • 32. Optimise DigiKam’s Performance There are a few things that you can do inorder to optimise the performance of digiKam when you are using it for the first time. 1. Rebuild All Thumbnails... When digiKam starts it loads the thumbnails when ever an album is opened, most of the time this takes sometime, however you can solve this issue by generating thumbnails. To do this go to Tools> Rebuild All Thumbnails. Depending on the amount of images on your collection this will take sometime. 2. Rebuild All Finger Prints…..This option is a must if you want to search your images for duplicates or if you want to enable fuzzy searches. To do this go to Tools> Rebuild Finger Prints. 3. Disable Scanning For New Images At Start up… By default digiKam scans your collections for new images. If you feel digiKam is slow when starting up disable this option. To do this go to Setting>Configure digiKam, when the window opens go to the last option named miscellaneous and disable it. See screen capture below.. These options will definitely improve performance and will give you a much more pleasant experience with digiKam…
  • 33. Using The Time-Line View In DigiKam DigiKam comes with some useful features and among them is the time-line view. Where it shows the images according to days, weeks, months and year. This is useful when you are trying to find a picture that was taken at a certain date. Click on the time-line view and the following window will appear. In the screen capture I’m asking digiKam to display my images according to the month. So it displays the months. If you take a closer look you can see that below the bar graph it has some letter “J” and “F”, here J stands for January and F for February. Meaning that it will display images taken during the month selected. Here the year is divided into months within the time line. When you are done selecting the month click on the red dotted square that you see surrounding the month. It will display all the images taken during January 2011. And it also gives you the total number of pictures taken in January 2011. It shows that i have taken 2947 picture in that month.