OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision.

Classier solution for file uploads in Ruby for Rack, Rails, Merb and Sinatra

Pure ruby library for read/write, chunk-level access to PNG files

The original fashion plates collected by Blanche Payne and others have been cataloged and carefully stored for preservation purposes in archival housing. Many of these plates are from some of the leading French, British, American, and other continental fashion journals of the 19th century and early 20th century

Scanned Images, Engravings and Pictures From Old Books

Thumbnails an image to the requested size.

Docsplit is a command-line utility and Ruby library for splitting apart documents into their component parts: searchable UTF-8 plain text, page images or thumbnails in any format, PDFs, single pages, and document metadata (title, author, number of pages...)

You probably experience this on a regular basis: a client sends you an illustration or a logo they’d like to use in a project, but it’s a low-res bitmap or a flat image file with a background texture. Or both, if you’re really lucky. Sure, you can try and ask for a vector version, but more often than not what they originally sent was the best copy they had on hand.

Get a static Google map by calling the maps API in an img tag

Using the attachment_fu plugin for uploading files

Free images of patterns for web design