2 Jun
2005
2 Jun
'05
9:16 p.m.
- Ran identify again on the resulting TIFF file, and
the comment's now
changed to: "Image generated by ESP Ghostscript (device=pnmraw)"
... so it looks like any TIFF 'metadata'
isn't getting preserved.
Worse, it is probably re-rendering the pixels, so unless it's quite
careful, it's introduced blur due to mismatches between the original's
pixel boundaries and the output's pixel boundaries. Did you compare
the pixel contents bit-for-bit?
Looking at the PDF file, I'm not convinced
there's any TIFF data in
there to be honest. It looks more like the image is re-encoded from
the input TIFF to PDFs own way of storing bitmap data - in other
words it's not simply a wrapper for a bunch of TIFF images, but
merely a wrapper for bitmap data in PDF's own format.
It's not *quite* that simple. I've seen PDFs containing JPEGs which I
could pick the JPEGs out of simply by looking for the
\xff\xd8\xff\xe0..JFIF marker.
Unless of course the "PDF's own format" *is* JPEG, which would be both
surprising and disappointing.
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