1
Q
What does compression do?
A
Reduces file size and changes various attributes of an image file. (eg. file type and resolution)
2
Q
What are the two types of compression?
A
Lossless and lossy
3
Q
What is specific about lossless compression?
A
It allows the data to be perfectly reconstructed! (eg. zip)
4
Q
What is specific about lossy compression?
A
Reduces a file permanently, eliminates certain information (especially unnecessary information) eg. JPG!
5
Q
Which compression is better for saving memory?
A
Lossy
6
Q
Which compression is better for overall quality?
A
Lossless
IGCSE COMPUTER SCIENCE MATS
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