AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2001.03.30 14:23 "RLE compression", by Raphael MARC
2001.03.30 16:58 "Re: RLE compression", by Daniel McCoy
2001.03.31 02:35 "RE: RLE compression", by Gavin Gee
2001.04.02 07:05 "AW: RLE compression", by Bartz, Klaus

2001.03.31 02:35 "RE: RLE compression", by Gavin Gee

Packbits is definitely in this category. However, if you mean "run length encoding" in a generic sense, CCITTFAX Huffman RLE (K=0), G3 (K>=1) & G4 (K<0) do have encoded horizontal runs of white & black pixels internally. The bits used to represent the runs, however, is completely different. The TIFF spec has details on how the horizontal runs are encoded if you're interested.

-----Original Message-----
From: Daniel McCoy [mailto:mccoy@pixar.com]
Sent: Friday, March 30, 2001 8:58 AM
To: tiff; Raphael MARC
Subject: Re: RLE compression