ImageMagick create scaled thumbnail - command line -

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I'm trying to get an image for me to convert image (command line Linux): < / P>

  • User Upload Image
  • I can convert this image to jpg

Next step

  • Eventually I have to add effects to the user controls without losing the ratio

Now However Whatever I have to do, it takes an image of any size and increases it to 320 x 320, which makes it a black background - or ultimately a background of choice Good!

Thanks for any advice / help - it's impossible to try to know what I need! Great examples under

Convert --Finance JPEG: Size = 320x320 source_file.jpg \ -Theme '320x320 & gt;' \ -Background Black - Gravity Center - North 320x320 outfile.gif

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