Engineering and Technology Journal

Abstract

This paper presents new approach in the edge detection of 3D images (for nonphotorealistic
rendering). This new approach uses curvature estimations with lighting
effect on triangle mesh as a new factor in edge detection process. New algorithm to
detect edges on 3D curved surface with results is presented. In the proposed technique,
the curved surface is generated by using Bezier curves and those generated curves are
connected together using a special fashion to generate triangle mesh. Depending on
those generated curves, the direction of surface becomes defined. The curvature is then
calculated at defined points on each curve. The estimated curvature and lighting effect
determine if there is edge can be detected or not. The size of the step of jumping
between two defined areas determines the accuracy of detecting edge. The algorithm is
tested on curved-surface which on it the edges are hardly to detect.
Keywords: Triangle Mesh, Curvature, Edge detection.