LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
September 2006
Previous Thread
Next Thread
Previous by Thread
Next by Thread
Previous by Date
Next by Date
Contact
The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems
Thread
2006.09.18 14:17 "Flate/RLE compression in TIFF", by Thierry Pierron
Hello, I wonder if libtiff support that kind of compression (as far as I've seen in tiff.h, it seems that not, but who knows ...). Actually this compression scheme consists first to compress data line by line using RLE (packbits) algorithm, then compress the whole stream (not line by line) using zlib (flate algorithm), thus its name : Flate/RLE. I found such compression into some EPS file. I would like to extract data part and put it inside a TIFF body, so that I can use libtiff to read them (without having to unpack them manually first, and then repack them using libtiff). Actually, I'm doing a similar job to read EPS file, compressed using COMPRESSION_CCITT_T6 (Group4) and it works rather well. I see that there is a function TIFFRegisterCODEC() that should interrest me, but as far as I've seen, it seems rather under documented. Maybe someone can point to an example using this function ? Regards, -- Thierry Pierron