关键词: 图像处理, 边缘检测, 信噪比, 定位精度, 边缘响应

Abstract: Edge detection is a key process in the field of image processing and machine vision, which can be used to the evaluation of product appearance quality and the improvement of technical route. Improving the traditional algorithm and designing new algorithm has become the research focus of image edge detection technology. This paper summarizes the basic principle of 2D image edge detection and the latest research progress of all kinds of edge detection algorithm. The first and second order differential operators are compared in terms of signal-to-noise ratio, location accuracy, and the advantages and disadvantages of each algorithm are analyzed. At the same time, it also summarizes the new progress of the modern edge detection algorithm in digital image processing, and points out the advantages and application features of the new algorithm in modern digital image processing.

Key words: image process, edge detection, signal-to-noise ratio, localization accuracy, edge response