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May 2006

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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 18:04 "Re: libtiff writes zero valued tile offsets and byte counts", by Chris Cox

On 5/30/06 1:42 AM, "Gerben Vos" wrote:
>
> 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).

Yes, Photoshop does try to read a lot of non-conforming TIFF images.

For the case given, it should only work if compression == none (so we can
compute the tile size).


Chris