Decomposition of Measured Contours Into Geometric Features Available to Purchase

In dimensional measurement applications where the object boundary data is indiscriminately collected, the need for detecting transition points from one feature to another arises. In addition, measured features must be matched with their corresponding nominal counterparts. In this paper, a solution to this problem is presented for planar contours which are composed of straight and circular edges. Two algorithms are presented, the first algorithm detects the transition points involving straight edges and the second algorithm finds the transition points between circular edges. The performance of these algorithms are demonstrated by simulated as well as actual part measurements.