LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
November 1999
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
1999.12.01 16:17 "Re: libtiff 3.5.3 release.", by Peter Smith
Bruce In my experience, CCITT G3 and G4 perform well only for certain kinds of images. I can't define for you exactly what will and will not work well (maybe somebody else knows this?), but I do know that images with a lot of small, randomly placed features (like noise) will not compress well at all. Peter > -----Original Message----- > From: Bruce Cameron [mailto:cameron@petris.com] > Sent: Wednesday, December 01, 1999 6:09 AM > To: Martin Bailey > Cc: tiff@olympiakos.com > Subject: Re: libtiff 3.5.3 release. > > > Most of the image I handle use CCITT compression, which I > have presumed > is lossless. It may be that the reason I get good small > images is that > for the most part I am operating on greyscale or binary images. Is > CCITT not lossless, or is it that it is a 'non-standard' compression? > > Martin Bailey wrote: > > > > At 17:23 30/11/99 -0500, Michael L. Welles wrote: > > > > >Unfortunatly, the compression removal means that saved > image size has > > >grown dramatically. Without a change in the TIFF spec to support > > >another lossless compression format, this is unavoidable. >