Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!hplabs!hpfcso!hpfcbig!bame
From: bame@hpfcbig.SDE.HP.COM (Paul Bame)
Newsgroups: comp.graphics
Subject: Re: Color Raster Compression
Message-ID: <7090003@hpfcbig.SDE.HP.COM>
Date: 14 Mar 91 22:50:42 GMT
References: <1235@attc.UUCP>
Organization: HP SESD, Fort Collins, CO
Lines: 8

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