Converting vector PDFs

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whugemann
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Converting vector PDFs

Post by whugemann »

I also encounter problems with transparency when converting vector PDFs to raster images. I put a test PDF generated from a CAD drawing by means of the Adobe Acrobat printer driver at http://www.unfallrekonstruktion.de/imagemagick/norm.pdf. When converting to
  • JPG: I get a white background
  • GIF or TIFF: I get a black background
  • PNG: I get a transparent background
and I cannot influence this behaviour by the "-background" option.
I believe this behaviour to be new, as I have done this before without such problems.
Wolfgang Hugemann
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fmw42
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Location: Sunnyvale, California, USA

Re: Converting vector PDFs

Post by fmw42 »

As you probably know, jpg does not support transparency. However, the gif and tif are puzzling if the png works?

So I tried,

convert norm.pdf norm.png

convert norm.pdf norm.gif

convert norm.pdf norm.tif

They all show transparency for me on IM 6.7.0.10 Q16 Mac OSX Tiger when viewing in Mac PREVIEW and IM display.
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