17 Aug 2004
CS 5244: Multimedia
27/44
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 ____________________________
lUp to 48 bits of color (compared to 8 in GIF)
lSupport for alpha channels (transparency) and gamma correction (white balancing)