Image primitive signatures

Image signatures are generated from the comparison of segments contained within an image to a database of segments collected over a large variety of images. It is impossible to retain all of the segments from all of the images so the segments are clustered becomes an image primitive as each cluster contains a unique set of similar segments. The size of the image signature is NK where N is the number of segments and K is the number of clusters. These numbers are significantly smaller than the dimensions of the image and so a signature is a condensed representation of the contents of the image.