1. Unit 13 Assignment 1
In this report I will be listing a range of considerations relating to digital graphics
technology and I will be describing features of digital graphics technology with
reference to examples.
Digital Imagers are images that are displayed on a range of devices such as
computers, tablets, laptops, game consoles and iPad etc.
There are two kind of digital images which are:
2. Bitmap (raster)
Vector graphics are made up of points, lines, curves, shapes and polygons. They are
all based on mathematical expressions so images are represented in computer
graphics. These images are scalable, so if I resize the picture, the good quality and
clearness of the image will stay the same. There is no background on vector images.
These images can be printed at any resolution, they are resolution independent.
Vector images are inappropriate for photo-realistic images. The most common file
formats that are used are: .ai, .cdr, .ps, .pdfs. The most common vector graphic
programmes that are used are: Adobe Illustrator, CorelDraw and FreeHand. Vector
graphics are mainly used for illustrations, drawings and cartoons.
Bitmap images are made up of pixels in a grid. The tiny coloured dots gather together
to form the image. Bitmap images are resolution dependant; the images cannot be
scaled up without losing the quality and the clearness of the picture, resizing the
picture reduces quality. If you try to reduce the size of the file (compression) so it’s
easier to send to someone else, you lose date, which means you lose quality. They
are restricted to rectangles, they are easily converted and there is minimal support
for transparency. The most common file formats are: .bmp, .tiff, .tif, .png, .gif, .jpeg,
.jpg. The most common bitmap programmes are: Paint and Photoshop. Bitmap
graphics are mainly used for Photographs and paintings.
The smallest part of a Bitmap (Raster) image is the pixel which has a single colour. If
you zoom in on a Bitmap image or if you scale up a bitmap image the pixels will start
2. to become visible. Each pixel on a screen emits red, blue and green light. By changing
the levels of each of these colours, the screen is able to produce any possible colour.
Image capturing is when an image has been scanned after being drawn.
Here is an example of what Vector and Bitmap images would look like if they were
In these images you can see that they are showing what bitmap and vector images
actually look like. The pictures and fonts have been resized so you can see the
difference between bitmap and vector images. The vector images have the same
clarity as the previous image. The picture is clear, not blurry and very easy to read.
However the bitmap images have changed, they have become blurry, pixelated and
really hard to read.
An output is when an image is outputted. When you output a picture it often
determines the kind of image it needs to be.
Screen: using pixels to display an image. Uses the RGB colour pallet (Green, Red and
Print: printing uses the CYMK pallet (Cyan, Yellow, Magenta, and Black)
Outputs: prints (paper), screen & online.
Storage determines the size of the storage, so how big or small it is and if there is
space for any other files.
3. Naming conventions: It is extremely important to save the work with appropriate
names. Names that are suitable. The reason it is important is because it’s much
easier for you to find your work. You need to back up your work on a USB or a cloud.
If you don’t, and you lose your work then you will not be able to get it back. However
if it’s backed up, you still have your work.
Asset management: It’s best to keep your work organized at all times so you don’t
get confused or anything, and you know exactly where everything is. Make sure the
work is put into the correct folder because it’s much easier to access.
File size: The larger the file, the harder it becomes to email. It takes much longer to
download, and it takes up a lot of space in the computers memory.