AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2004.05.18 17:47 "[Tiff] Recovering tiff faxes corrupted with 3.6.0", by Andrew McGill
2004.05.19 13:54 "[Tiff] Re: Recovering tiff faxes corrupted with 3.6.0", by Frank Warmerdam
2004.05.20 13:38 "Re: [Tiff] Re: Recovering tiff faxes corrupted with 3.6.0", by Thomas J. Kacvinsky

2004.05.18 17:47 "[Tiff] Recovering tiff faxes corrupted with 3.6.0", by Andrew McGill

Hi there

I have attached two files, representative of a problem I currently have, following a software upgrade to libtiff 3.6.0 as included with SuSE Linux 9.0. I hope it is not inappropriate to post data files to this particular list:

I have tried a number of approaches to correcting the error, which I am guessing is the bit ordering in the header not matching the bit ordering in the data file.

I tried this...
  tiffset fillorder msb-to-lsb fax01492.tif

Which is clearly not right, because it complains...

  fax01492.tif: Can't open a compressed TIFF file with compression for update..

My problem here is I don't understand the nature of the corruption in the files, which makes it rather difficult to fix. I'm going to spend the evening hacking at tiffset, but I have a feeling it's going to be an uphill battle, since the program is not supposed to deal with corrupt file (or, for that matter generate them).

I have 50 of these files from we-are-not-quite-sure-who, but we know that half of them did not set their fax number on their sending system. Any help would be appreciated.

&:-)