image file formats

Question 1

Graphic Interchange Format

Answer 1

Pixel-based
256 colours - 8 bit - not good for photos - old
lossless compression - good for drawings - LZW
options for transparency and animation

Question 2

Portable Network Format (PNG)

Answer 2

pixel-based
upto 24 bit colour
lossless compression

Question 3

Joint Photographic Experts Group

Answer 3

lossy compression
quality depends on the level of compression
suitable for photos, not drawings
meant for photos

Question 4

Scalable Vector Graphics

Answer 4

newer standard
recommended
describes lines and curves not pixels - no loss of quality when scaling