Invariant shape description and measure of object similarity

One of the most important problems in computer graphics and image processing is to find rotational, translational and scale invariant description of planar shapes. In the paper, a new invariant shape description by a binary shape matrix is presented. Properties of the shape matrix are discussed and a measure of the shape similarity is introduced. The problem of image matching is also addressed. It is shown that the shape matrix can be successfully used as the feature for object recognition.