FlexImage is a plugin that allows you to put image data in your database and retrieve at any size, quality or cropping you like. It evens supports some ineteresting effects with overlays, borders, shadows, and more.

Combine this with page caching and you have a fast and easy way to manage large numbers of uploaded images that are always just the right size for your needs.

Prerequisites

RMagick must be installed http://rmagick.rubyforge.org

Effects supported

Effect examples: http://beautifulpixel.com/articles/2006/10/26/flex-image-now-has-special-effects

• resize: resizes an image, with or without cropping.
• overlay: adds a semi transparent image on top of the base image.
• border: adds a border around your image of any color you wish.
• shadow: adds a drop shadow with configurable color, background color, blurriness and offset.
• crop: to extract a small section of a larger image.