SVG images are a great way to display vector images online; however some older web browsers do not support this format. The compass-svg-polyfill gem generates fallback PNG images for these browsers.

Generate an image containing your GitHub contribution calendar.

A dangerous Ruby blog engine, with a photographic memory.

Credo detector

Manage your model images with RMagick and CarrierWave

crop the captured profile image of 'Doubutsu-No-Mori Pocket Camp' and divide it to 'face', 'name' and 'id' images

Crops images based on entropy: leaving the most interesting part intact. Don't expect this to be a replacement for human cropping, it is an algorythm and not an extremely smart one at that :). Best results achieved in combination with scaling: the cropping is then only used to square the image, cutting off the least interesting part. The trimming simply chops off te edge that is least interesting, and continues doing so, untill it reached the requested size.

Merges many PNG images into a single image and generates a CSS stylesheet

A simple and custom captcha for Rails3.

Generate an artistic QR codes.

356 Projects for Sinatra/Sequel

A library for zoomifying images

This is a perceptual image hash calculation and comparison tool. This can be used to match compressed or resized images to each other.

CLI for Dealwithify

Provides a method to retrieve the image most similar to the specified image from the array.

A tool for processing cave photos for DeSoto Caverns.

A gem that grab the signature from Despatch Master which is in Vector Array format and convert it into an image

Calculate the DHash of an image file

Lagrangian dHash in Ruby.

Toolkit for working with DICOM image sequences