Discrete cosine transform library for .NET, written in C#. Optimised for use with bitmaps.
DCTFun is a test application for using the DCT library. When input an image, it will output both the reconstructed image and the underlying coefficient table in bitmap form.
This is an example of what the coefficient table output can look like. Original: http://kr0npr1nz.deviantart.com/art/Blade-Runner-Rachel-431108876