Survey on Polygonal Approximation Techniques for Digita planar curves

Polygon approximation plays a vital role in abquitious applications like multimedia, geographic and object recognition.An extensive number of polygonal approximation techniques for digital planar curves have been proposed over the last decade, but there are no survey papers on recently proposed techniques.Polygon is a collection of edges and vertices.Objects are represented using edges and vertices or contour points (ie.polygon).Polygonal approximation is representing the object with less number of dominant points (less number of edges and vertices).Polygon approximation results in less computational speed and memory usage.This paper deals with comparative study on polygonal approximation techniques for digital planar curves with respect to their computation and efficiency.