patmec@attc.UUCP (Pat Mecheski) (03/13/91)
Color Raster Compression Hello, I am looking for a good format for color raster compression. The format should compress 8-bit color reasonably well and have good compression/decompression performance. The LZW compression format seems to compress well, but I am concerned about performance. Does anyone have any info on LZW's compression/decompression performance? I also heard that there could be legal issues with using LZW, does anyone know anything about this? What other lossless color compression formats are available? Thanks very much for any help!!!!!!!!!!!! Pat Mecheski email: patmec@auto-trol.com
bame@hpfcbig.SDE.HP.COM (Paul Bame) (03/15/91)
If you ever have to compress 24-bit color images with LZW, separate each color plane into a separate file and compress each separately. If you compress the RGBRGBRGBRGB... data it doesn't work as well as when you compress RRRRR then GGGGG then BBBBBB - at least for semi-realistic images. -Paul Bame bame@fc.sde.hp.com N0KCL