Deformation and Viewpoint Invariant Color Histograms:
http://www.cs.umd.edu/~domke/histograms/
From MATLAB-central
(Thread Subject: Image histogram and difference between color bins, Author: ImageAnalyst)
Here's a nice web site with a big list of color-related links:
http://www.efg2.com/Lab/Library/Color/index.html
Here you can find the color and gamma FAQ's:
http://www.poynton.com/
The Rochester Institute of Technology Munsell Color FAQ:
http://www.cis.rit.edu/mcsl/faq/
A list of hundreds of colors with their names:
http://web.njit.edu/~kevin/rgb.txt.html
A way to visualize the 3D color gamut of your image with this plug-in for free software ImageJ (very, very cool plug-in!!):
http://rsb.info.nih.gov/ij/plugins/color-inspector.html
Macbeth ColorChecker chart
http://www.xrite.com/product_overview.aspx?ID=824
Paper (CCH):
Object Recognition with Color Cooccurrence Histogram
Logo and trademark detection in images using Color Wavelet Co-occurrence Histograms
Image Retrieval Using Colour Co-occurrence Histograms
Modified Color Co-occurrence Matrix for Image Retrieval
Discussion Board:
Matlab Central
Matlab DSP Discussion