CODEWITHSUNDEEP
imageimage-processingimage-manipulationimagemagick
StackOverflowNewbie
StackOverflowNewbie

Reputation: 40653

Commands for ImageMagick to create thumbnails

Given an photograph uploaded by a user, what is best approach to creating a number various sized thumbnails Using ImageMagick (or GraphicsMagick)? My guess to the steps:

  1. Create a super sample of the image, maintaining original aspect ratio
  2. Apply watermark to super sample
  3. Create the various sized thumbnails using the watermarked super sampled image

Additional requirements:

  1. Best quality possible (does this mean PNG over JPG?)
  2. Smallest file size possible (does this mean JPG over PNG?)
  3. Use density of 72x72, units is ppi

Since I am not that familiar with the intricacies of IM (or GM), some guidance to the best commands that meet my objectives would be highly appreciated. Thanks.

Upvotes: 7

Views: 18383

Answers (1)

John Percival Hackworth
John Percival Hackworth

Reputation: 11531

Check out the ImageMagick documentation:

The best quality possible is complicated since difference images compress differently. I'm partial to PNG since it has a variety if compression techniques available to allow for experimentation.

Upvotes: 1

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