how to convert height and width by percentage separately

[incendie22]

So I have an a lot of images with different height and width. I want to resize the image by percentage, with height at a different percentage and width at a different percentage.

So an image of 200 x 100 pixel i want to convert it by 50% height and 30% width. how would I do that with imagemagick?

[fmw42]

I have moved this message here from Fred's Scripts, since it has nothing to do with my script.

Please always provide your IM version and platform, since syntax may vary.

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convert image -resize 50%x30% resultimage

If on IM 7 use "magick" rather than "convert"

If you want to process multiple images in one folder all at one time, then use mogrify or magick mogrify. See http://www.imagemagick.org/Usage/basics/#mogrify

[incendie22]

doesn't work. the result image is 50x25. it didn't even register the 30% width.

[snibgo]

You should tell us the IM version you are using, and the platform.

For example, if your code is in a Windows BAT file, "%" has a special meaning (about script parameters). When you don't want that special meaning, you need to double them:

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50%%x30%%

[fmw42]

What was your exact command line and your IM version and platform? As I said above, syntax may differ. Did you enter your image in the command as imagename.suffix?

What do you get from

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convert -version

That will tell us your IM version and your delegates.

[incendie22]

Double %% works. Thank you very much.