[Pkg-gmagick-im-team] Bug#1115346: Acknowledgement (magick's conversion from a scanned and processed PNG to PDF adds additional stripes to the top and right)

[Peter Müller]

It turned out that the caNv chunk in the PNG file is the culprit. No idea which tools exactly introduced it, but it's likely to be scanimage, GIMP, or pngcrush. Attached is a slightly smaller input.png file (I removed the gAMA chunk) and the corresponding output.pdf resulting from `convert input.png output.pdf`.
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