UNIT 2

Question 1

Explain the lossy compression and an example

Answer 1

It discards some information of the original image. JPEG is an example.

Question 2

Explain the lossless compression and an example

Answer 2

Discards NO information of the original file. Uses algorithms.GIF, TIFF, PNG

Question 3

High compression leads to a ___ quality image

Answer 3

lower

Question 4

Low compression leads to a ___ quality image

Answer 4

higher

Question 5

Considerations when selecting graphics

Answer 5

1. File size (reduce number of colors and image size)
2. Colour depth (number of colours used in an iamge)
3. Image resolution (number of pixels contained within an image)
4. Anti-aliasing: to make the edges appear smooth.

Question 6

Types of graphics (2)

Answer 6

1. Bitmap

2. Vector