ImageMagic renders image with black background

Question

I'm converting pdf files to images with ImageMagic, everything is ok until I use -resize option, then I get image with black background. I use this command:

convert -density 400 image.pdf -resize 25% image.png

I need to use -resize option otherwise I get really large image. Is there any other option which I can use to resize image or is there option to set background in white.

score 0 · Answer 1 · answered Sep 17 '13 at 07:45

0

That's not a Ghostscript command, You will need to find out what convert is sending to Ghostscript. As it stands I can't even be sure that your problem is with Ghostscript ,since it could easily be something that convert is doing.

answered Sep 17 '13 at 07:45

KenS

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I'm sorry I thought it's ghostscript, can you tell me how to check what convert is sending to ghostscript – Alen Sep 17 '13 at 08:27
I updatated my question, I'm using imagemagic not ghostscript – Alen Sep 17 '13 at 08:33

score 0 · Accepted Answer · answered Sep 17 '13 at 08:42

Solved it by removing alpha from image, it seems imagemagic tries to apply some opacity but since jpeg doesn't allow transperency result was black background. So I found example on imagemagic website and it helped me:

convert a.pdf   -background skyblue  -alpha remove -alpha off a_remove.jpg

ImageMagic renders image with black background

2 Answers2