Harry -
On May 13, 11:47 pm, Harry van der Wolf <[email protected]> wrote:
> For the others in this list, the repeated warnings are:
> "TIFF library warning tiff module: TIFFReadDirectory"
It would be terribly helpful to know
which program issues this message, wouldn't it?
> I'm sure that your tiffs are created from a DSLR (a canon or nikon?) either
> directly, or via the RAW convertor delivered with your camera. If you open
> such a tiff in OSX Preview you will see that it has 2 images. A full
> resolution 16bit tiff, most probably with an alpha-mask, and a small preview
> tiff.
Again some definitive answer would be
appropriate, e.g., what does tiffinfo(1) say
about the image files?
> If have seen this also with enfuse often. Enfuse can't handle these tiffs
> and crashes on it. I had to write a patch for my ImageFuser(1) program to
> overcome that behavior from enfuse.
Enfuse (and Enblend) ought to process
multi-directory TIFF files. In particular they
should not crash. If fact, there never has been
any failure reported on multi-layer images.
Of course it is utter nonsense to feed a
2-directory TIFF image as described above (full
quality image plus thumbnail) into Enfuse (or
Enblend for that matter), because the different
layers are not meant to be fused (or blended),
whereas both Enblend and Enfuse process all
directories. This behavior is documented in
Section 1, "Overview", of the Enblend and the
Enfuse manual.
> Even more: I think that the only reason that hugin does not crash (on all
> platforms) when having to handle these kind of tiffs in stacked panos, is
> because nona (and align_image_stack) are not that intelligent and just grab
> the first image in the tiff that they encounter. And then they deliver a
> single (cropped) tiff to enfuse and enblend which than can handle these new
> intermediate "single tiff" images.
>
> Please let me know whether I'm correct in my analysis of the tiff behavior.
Many applications ignore all but the
first directory in a TIFF file.
However, the true support of multi-directory
TIFFs implies quite an extra effort. We have
not even reached a conclusion on the syntax to
process multi-layer images for Enblend and
Enfuse! See, e.g. the brief "discussions" at
http://sourceforge.net/tracker/?func=detail&aid=2885858&group_id=123407&atid=696409
http://sourceforge.net/tracker/?func=detail&aid=2977905&group_id=123407&atid=696412
/Chris
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