1. A defect analysis system for examining a part to determine whether defects are present, said system comprising: first means for obtaining electrical signals representative of the condition of a plurality of discrete picture elements in a field of view of the part presented for analysis; thresholding means coupled to said first means for generating a set of electrical signals indicative of picture elements of an anomalous type distinct from the other picture elements; region growing means for associating contiguous picture elements of the anomalous type to define multiple regions of anomalous picture elements in a single raster scan of the field of view being analyzed; region statistics generation means for generating statistics relative to the size, shape and orientation of the anomalous regions during the same single raster scan; and region analysis means for comparing the region statistics with predetermined rejection parameters to determine whether a rejectable defect exists in the part.