AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2007.09.23 16:42 "[Tiff] G3 fax: EOL needed at the beginning of each strip?", by ComSquare Martin Osieka
2007.09.24 01:27 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Bob Friesenhahn
2007.09.24 05:56 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Joris
2007.09.24 07:24 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by ComSquare Martin Osieka
2007.09.24 07:51 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Joris
2007.09.24 08:01 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Andy Cave
2007.09.24 08:32 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Joris
2007.09.24 08:45 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Andy Cave
2007.09.24 09:03 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Joris
2007.09.24 08:52 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by ComSquare Martin Osieka
2007.09.24 08:58 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Andy Cave

2007.09.24 01:27 "Re: [Tiff] G3 fax: EOL needed at the beginning of each strip?", by Bob Friesenhahn

I'm using libtiff 3.8.2 to decode tiffs containing fax images.

Recently I received TIFFs showing white lines in the image.

I decoded them and detected that only the first strip started with an EOL but not the others.

The decoding of a strip always starts with SYNC_EOL() which eats up the first line of the strip if there's no EOL.

The result is that at the end of the strip one line is missing, which is filled up with white pixels.

Are you able to make one of these problem images available for download from somewhere or send it in an email?

Libtiff is widely used, and while it definitely has bugs, a problem with image data access is usually quickly reported (as you have done) and fixed.

If you do believe that libtiff is doing something wrong, then you should post a formal bug report via the libtiff bug tracker.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/