LibTiff Mailing List

Thomas Sharpless wrote:
>
> My scanning camera app writes tiled tiff images using libtiff under Win32.  The
> images are readable by PhotoShop (6.01) but not by PaintShop Pro 7 or libtiff
> itself.  The problem seems to be that all the tile offsets and bytecounts in the
> file are zero (their number is correct).  Can anyone tell me why?

It's hard to image that such a file would be readable by Photoshop (unless it
applies some heuristics when it encounters a nonconforming TIFF file).

Your code looks good at first sight. Maybe you can make a TIFF that you created
this way available by FTP or HTTP, or at least post the output of tiffdump? Also,
you could try to reduce your code to a short, self-contained program that writes
a TIFF, so we can reproduce your problem.

					Gerben Vos.


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive May 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 2006.05.25 17:24 "libtiff writes zero valued tile offsets and byte counts", by Thomas Sharpless 2006.05.30 08:42 "Re: libtiff writes zero valued tile offsets and byte counts", by Gerben Vos 2006.05.30 18:04 "Re: libtiff writes zero valued tile offsets and byte counts", by Chris Cox 2006.06.01 03:42 "Re: libtiff writes zero valued tile offsets and byte counts", by Joris Van Damme 2006.06.01 04:09 "Re: libtiff writes zero valued tile offsets and byte counts", by Chris Cox 2006.06.08 22:27 "Re: libtiff writes zero valued tile offsets and byte counts", by Mark R Olin 2006.06.08 23:22 "Re: libtiff writes zero valued tile offsets and byte counts", by Joris Van Damme 2006.06.08 18:44 "Re: libtiff writes zero valued tile offsets and byte counts", by Frank Warmerdam 2006.05.30 08:42 "Re: libtiff writes zero valued tile offsets and byte counts", by Gerben Vos Thomas Sharpless wrote: > > My scanning camera app writes tiled tiff images using libtiff under Win32. The > images are readable by PhotoShop (6.01) but not by PaintShop Pro 7 or libtiff > itself. The problem seems to be that all the tile offsets and bytecounts in the > file are zero (their number is correct). Can anyone tell me why? It's hard to image that such a file would be readable by Photoshop (unless it applies some heuristics when it encounters a nonconforming TIFF file). Your code looks good at first sight. Maybe you can make a TIFF that you created this way available by FTP or HTTP, or at least post the output of tiffdump? Also, you could try to reduce your code to a short, self-contained program that writes a TIFF, so we can reproduce your problem. Gerben Vos.

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2006.05.30 08:42 "Re: libtiff writes zero valued tile offsets and byte counts", by Gerben Vos