3 Sep 2003
CS 6210: Module 4
7/24
GIF / PNG
¡GIF (‘jiff’, Graphics Interchange Format)
lStable, lossless color format
lCompression achieved by:
¡8-bit format (256 colors)
¡LZW encoding (Unisys patent)
l_______________________________
lInterlacing options for low-bandwidth accessibility
¡PNG (‘ping’, Portable Network Graphics)
lUses public-domain variant of LZW, gzip
lUp to 48 bits of color (compared to 8 in GIF)
lSupport for ____________________ and _______________________