Legacy ImageMagick Discussions Archive

How can I use the command line 'convert' tool to resize an image with a maximum size and keep proportion. For example: I have a 1024x768 image ("test.jpg") that I want to make a thumbnail of ("thumb-test.jpg"). I say the thumbnail can be (at most) 320x320. The resulting image should then have the size of 320x240. And same thing if the image was 768x1024 - to result in 240x320. Thanks in advance!

ImageMagick, by default, scales an image while maintaining the original aspect ratio of the image as you require.

Could you give me an example of how I would specify that on the command line?

See http://www.imagemagick.org/Usage/resize/ for examples on resizing an image.

Thanks