A Demonstration on Initial Segmentation Step on Closed Digital Planar Curve

Abstract

Polygonal approximation technique is used to represent boundary of a digital image, where the boundary is approximated using piece line segments to present the shape of the original boundary of a digital image. This paper uses the value of the turn angle between two line segments multiplied with the length of those line segments as a measure to detect good curvature points. The boundary acquisition technique produces boundary with many duplicate points. To expedite the process of obtaining final polygon, an initial segmentation step is mandatory. This paper demonstrates the contribution of initial segmentation by freeman chain code on the digital planar curves. The experimental results too support the same.