ASD

1. ADOBE Photoshop Software
 It is the most comprehensive and popular
photo editor/image editor.
 It’s primary purpose is to make changes to
photographic images that you somehow
managed to get on disk, CD graphic
collections, internet or other sources.

2. Images, Pixels and Resolutions
 Image is made up of a grid of colored
squares called pixels.
 Each pixel in a computer image is perfectly
square, arranged on a perfect grid, and
colored uniformly.
 Each pixel is one color and one color only.

3. Screen Pixels and Image Pixels
 If you view an image in a zoom ration of
100%, this means that you can see one pixel in
your image for every pixel displayed by your
monitor.
 At 200% zoom factor magnifies the image pixels
twice their previous size so that one image pixel
measures two screen pixels tall and two screen
pixels wide.
 The zoom factor has nothing to do with the size
at which your image will print – it affects only
how your image looks on screen. If you want to
see your image on-screen at its approximate print
size, choose Actual Pixels.

4. Three primary attributes of a
Photoshop image related to Pixels:
 File Size (Pixel dimension)– It is a measure of how
many pixels the image contains. If an image has 256
pixels wide and 384 pixels, the total is 98,304 pixels.
 Resolution – It refers to the number of pixels that
print per inch. Usually an image has a resolution of
180 pixels per inch (ppi). It determines how tightly
the pixels are packed when printed
 Dimension – It is the physical width and height when
printed, as measured in inches, centimeters and your
unit of choice. You can calculate the dimension by
dividing the number of pixels by the resolution. (256
pixels/180 pixels per inch = 1 3/8 inches wide.)

5. Remember that, . . . .
 Lowering pixel dimensions values can be
dangerous because what you’re really doing is
throwing way pixels and deleting pixels means
removing details in the image.
 When you raise the Pixel Dimensions
values, Photoshop adds pixels by averaging the
preexisting pixels (process called interpolation).
Image resulting to softening and never results in
the miraculous reconstruction of detail.
 Ideally, more pixels you have, the greater image
detail and more disk space the image consumes.

6. Ideal and Acceptable Settings
Type of Job Ideal Resolution Acceptable Setting

7. Image Formats
 Images refer to a whole range of picture
elements, including scanned picture and
photographs, icons, illustrations, drawings
and simple animation.
 It is also important to consider how quickly
or slowly an image can be downloaded form
the Internet by the browser. The more
pictures, the downloading is slower.

8. Types of Image Formats
 JPEG stands for Joint Photographs
Experts Group. It is very popular image
format because it can support 8-bit or 24-
bit color. JPEG files are smaller in size
than other image files, because JPEG uses
a higher compression ratio. Most image
files downloadable from the Internet are in
JPEG format

9. Types of Image Formats
 PNG stands for Portable Network
Graphics and is a new format that supports
both 8-bit and 24-bit color. PNG is open
standard, which means that anyone is free
to use it. The PNG file is recognize by the
.png

10. Types of Image Formats
 GIF stands for Graphics Interchange
Format. It supports 8-bit color and it is a
common image format. There are three
forms of GIF. (plain GIF, Transparent GIF
and Animated GIF)
 TIFF stands for Tagged Image File Format,
which is commonly used to exchange
documents between different computer
platforms. TIFF has an extension name.tif
TIFF supports 1,4,8,24 bits per pixel.

11. Types of Image Formats
 BMP is Bit Mapped Picture. It is a
standard Microsoft Windows image format
that uses the extension name.bmp. It can
support 1, 4, 8, 24 bits per pixel. These
files are usually created using Microsoft
Paint and Paintbrush programs and are used
for the wallpaper in Windows. The
standard browsers do not currently support
this file type.