LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
January 2003
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
2003.02.07 03:55 "Re: tiffset.exe instructions (was Re: tiffcp problems)", by Peter Montgomery
Ray,
> But some that were OK are becoming white letters on a black background
> in MS Imaging, yet still display OK in MS Photo >Editor. What happens
> when they are "saved as" by either application is a whole 'nother
> story! I'm no quite sure yet why this behavior is occurring, but as I
> get more clues and hints from this list, I'm sure it'll be figured it
> out.
What are you using tiffcp to do? Are you performing some additional
conversions such as compression type? My app is pretty simple in that
it just searches for the appropriate tag, checks the value, and then
converts it if it isn't what was passed on the commandline. It's super
quick because I don't re-write the file, I just tweak the value of the
tag in place so I only have to write a few bytes. I am curious if all
your files are the same endian. If not, can you tell if the files that
work are one endian versus the weird files being a different endian?
I'm just trying to think of what might be causing the problem on my end.
BTW, if you simply need to change the photometric interpretation, then
you don't need tiffcp. If you're concerned about my program screwing
up, you can always copy the files and then tweak the copies. Once you
have verified they are good, then just delete the originals. It'll save
a ton of time since you don't have to decode and re-encode the files.
Thanks,
PeterM
PS - Have you tried taking a problem file and just running it only
through my tweaker program? You should then perform the same experiment
and just use tiffcp. See if you can isolate the odd behavior to either
of the two apps separately.