Allowing users to crop and resize images Ruby on Rails

ruby-on-rails image-processing crop rmagick
Tom Pinchen picture Tom Pinchen · Mar 8, 2013 · Viewed 11.2k times · Source

Sorry for the fairly generic question but I was wondering whether anyone had any recommendations on how to best allow users to crop and edit their own images.

What I would like to happen is that when a user uploads their image on my app for the app to show a copy of the image with an overlay that only allows a fixed aspect ratio (perhaps 4:3), the user would then be able to select the area of the image they would like to crop and save as their image.

The best example I can think of this is when cropping cover photos on Facebook.

I have looked into the various Gems and elements that I believe would be needed as below:

Carrierwave - For file uploading (and I think cropping - correct me if I am wrong) ImageMagick/Mini-Magick/Rmagick - to handle processing the image.

However I am still a little unsure how these fit together.

Any advice people have on the best combination of gems and how they work together to achieve this cropping feature would be much appreciated.

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