1. An apparatus for finding dimensions of an object in an image, in an image processing system having a binary boundary tracker comprising: a threshold selection tool for analyzing an element of said object, said element having known dimensions, to obtain a threshold grey value; said binary boundary tracer coupled to said threshold selection tool for generating signals representative of the coordinates of the boundary of said object using said threshold grey value to self-calibrate; and an angle finder for obtaining angles of selected segments of said boundary of said object and generating histogram data therefrom, said angle finder including a feature analyzer for obtaining candidate corners of said object having changing angles from a first segment to a second segment in excess of an angle threshold, and for analyzing the geometric properties of said candidate corners for correspondence to features being sought so that the dimensions of said candidate corners in said image can be determined, measured and reported to a host controller.