[Poppler-bugs] [Bug 92449] pdftohtml ignore png format option and extract inverted jpg images

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92449

--- Comment #1 from Francisco <francisco.dossantos at fia-net.com> ---
I've stumble upon the same bug, recent version (september 2016) compiled from
git master (poppler 0.47).

pdfimages -j test.pdf out
Produce an inverted grayscale jpeg.

pdfimages -png test.pdf out
Produce a normal grayscale image.

pdfimages -list test.pdf
page   num  type   width height color comp bpc  enc interp  object ID x-ppi
y-ppi size ratio
--------------------------------------------------------------------------------------------
   1     0 image    2817  1981  sep     1   8  jpeg   no        16  0   343  
170  112K 2.1%


I've tested several PDF (sorry can't share it) and I found that only the jpeg
with a colorspace 'sep' (csSeparation) produce an inverted grayscale image.

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