Public bug reported:
Binary package hint: inkscape
A JPEG image is already compressed using /DCTDecode and can be embedded
straight into an output PDF without altering or recompressing the
content.
In the example given, I used Inkscape for composition, placing an
affine-transformed semi-transparent PNG image of a narwhale over a large
JPEG background showing Big Ben and the London Eye. The input files
were 1.2 MB and and 33 kB and the total output size of the PDF should
ideally have been the same. Instead, the PDF output file was 8 MB and
the inspecting it shows that /FlateDecode was being inefficiently used
for the JPEG stream.
Ideally JPEG streams should be output using /DCTDecode to retain the
original compression efficiency and avoid any recompression.
** Affects: inkscape
Importance: Undecided
Status: New
** Affects: inkscape (Ubuntu)
Importance: Undecided
Status: New
** Tags: exporting pdf
** Also affects: inkscape
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/747111
Title:
Save to PDF: embeds JPEGs using /FlateDecode instead of /DCTDecode
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