Online Image Processing Tools  
   This demo allows you to process your own images via the web. Tools include Stereo images, Segmentation, Zerocrossings, Contourlines, Histogram-Transformations, Color-Separations, Anaglyph Creation, Principal Components.
   http://axon.physik.uni-bremen.de/online_calc

Pic2segment image segmentation demo  
   Image segmentation demo from Isis (Intelligent Sensory Information Systems) research group at University of Amsterdam.
   http://zomax.wins.uva.nl:5345/seg_fixed/

CIS: Semantics-based Categorical Image Search and Retrieval  
   CIS is a semantics-based image search engine developed at Vision Research Lab at UCSB. Instead of using a bottom up method, CIS utilizes a top-down approach to categorize images semantically.
   http://nayana.ece.ucsb.edu/imsearch/imsearch.html

SIMPLIcity  
   Large-scale content-based image retrieval by James Wang, Jia Li, and Gio Wiederhold. Uses wavelets to Classify web sites and web images.
   http://www-db.stanford.edu/IMAGE

CIRES: Content-based Image Retrieval System  
   This system employs texture analysis via a Gabor filter bank, CIE Lab space color histogram, and structural analysis using perceptual grouping principles.
   http://amazon.ece.utexas.edu/~qasim/qdialog.htm