Image Recognition System (still buggy) which determines "example-ness" by clustering based on responses to filters. Includes Pattern (responses to filters used for clustering), Cluster (combination of Patterns), ClusTree (clustering using nearest-neighbor trees), Image (ppm file reader), GausImage (image on multiple scales for multidimensional pattern recognition), Histogram (a collection of clusters for statistical analysis; contains multiple clustering algorithms), Model (multiple histograms describe a class of images), and System (a combination of models for classifying an image), and Cluster data file I/O.