Edge Detection

In this paper, first, I will give a brief concept about what the edge and corner is, and for what purpose of catching that information. Then I introduce several popular methods to detect edges and corners and give some experimental results. In early researches, usually the edge enhancement operators have been derived heuristically. We will see that an analytic approach to the design of these operators, and recent algorithms to detect the corners, edges, ridges, valleys, isolated dots, saddles, and plains. These are important physical features for the intensity distribution of an natural image. Besides, the accuracy in detecting these discontinuities and efficiency in implementing these operations are also quite important criteria for using an algotithm in the patch of computer vision.