1. In this report I will I will be explaining digital graphics technology, bitmap, and vector, factors that
affect quality, output, organisation, and output and capturing images.
Bitmap images are made up of very small and tiny pixels. Bitmap images are one of the two types of
digital graphic images. One advantage is that it is extremely quick and easy to use. One disadvantage
of a bitmap image is that it can’t be enlarged or scaled; if it is then it will lose quality. If scaled or
enlarged the picture will turn out to be unclear. This means that Bitmap images are resolution
dependent.Pixels are the smallest part of a bitmap (raster) image. This pixel will have a single colour.
If you zoom in far enough, or scale a bitmap image up, you can see its pixels. Also it is the smallest
controlled element of a screen. Each pixel on a screen emits red, green and blue light. By changing
the levels of each colour (red, green and blue) your screen is able to produce every possible colour,
this applies to all screens such as your laptop, television and phone screens.
Common bitmap files: .jpg, .jpeg, .gif, .png, .tif, .tiff, .bmp.
Common bitmap programmes: paint, Photoshop
Common bitmap images: photographs and paintings
Vector images are the second type of digital graphic images. Vector is made of points, lines and
curves- the image is built and displayed through mathematical expressions. One Advantage of Vector
images are that it can be scaled (re-sized) and will not lose clarity or quality. One disadvantage is
that it takes way too long to create. Also the file sizes mostly are too big; this is due to the higher
resolution of the images. Because of this it may be difficult to send the pictures via email.Also storing
online would take up a lot of space.
Common file formats: .ai, .cdr, .ps, .pdfs
Common vector graphic programmes:
Adobe illustrator, CorelDraw, freehand
Common used of vector graphics:
Drawing, illustrations, cartoons
Factors which impact image quality:
Compression: this is when you try to reduce the size of a file, perhaps to make it easier to send to
someone else.
By compressing the image you lose data, this means you lose quality.
Resolution: this is the size of an image. It is how many pixels tall, and wide, an image is.
The higher the resolution, the better the quality.
However this means the file size is larger.
Output

2. How an image will be outputted often determines the kind of mage it needs to be.
Outputs: print (paper), screen and online
Print: printing uses the CYMK colour pallet (cyan, yellow, and magenta, black)
Screen: use pixels to display and image, so uses the RGB colour pallet (red, green, blue)
Image capturing
People generally think that there is only one way of image capturing, via using a digital camera. This
however is not the only way, there are 2 other ways such as;
1.
2.
3.
Scanning an image which has been drawn. This image cannot be resized without losing
quality.
Digitally drawing an image in Photoshop with a sketchpad and stylus. This image can be
resized, providing it is being drawn as a vector image.
Using a digital camera. Simply takes a photo which is saved digitally. Stored as a bitmap
image, so will lose quality if re-sized.
Storage
File size- the larger an image is, or the higher its resolution, the larger the file. This causes it to be
harder to email, longer to download and Takes up more space in a computer’s memory.