[Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution

[Pantxo Diribarne]

Follow-up Comment #1, bug #55486 (project octave):

The fact that imread can import PDF (vector) files is not documented, so not
officially supported. I'll change the item group into a "feature request" to
add options for importing vector formats.

I am not in favor of adding such capability (and I'll let devs other
developpers give their opinion):
* options like "PixelRegion" will become complicated since the resolution of
the rasterizer engine will come into play.
* it is very easy to do what graphicsmagick does: use ghostscript to first
convert the PDF file to raster format and use whatever option you want.


system ("gs -sDEVICE=png16m -dTextAlphaBits=4 -r300 -o output.png input.pdf")
im = imread ("output.png")


On windows, you'll have to find the ghostcript binary (in the bin folder) and
replace "gs" in this example.

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