RECOGNITION !ETHOD OF SHAPE DISTORTED OBJECTS USING HIERARCHICAL FEATURE
Descr Ipt I Oms, Jitao Yang, PR China · 1988
In this paper, ne present a recognition method which is developed boundaries, boundaritsbecome the polygons. In this case, the for recognizing shape distorted and partially overlapped flat objects. recognition problem of flat parts is equivalent to the recognition Several features which are invariant or insensitive to the shape problen of polygons. distortions caused by position, stalling and 3-0 rotation are proposed. A hierarchical description and matching technique of the 1.1 Basic Definitions and Characters features make the recognition method powerful. As we have pointed that the concavity and convexity of curves are invariant