中图分类号：TP391.4 文献标志码：A DOI: 10.16157/j.issn.0258-7998.245903 中文引用格式： 何志勇，李祎，闫松，等. 数字图像边缘检测算法研究[J]. 电子技术应用，2025，51(8)：70-73. 英文引用格式： He Zhiyong，Li Yi，Yan Song，et al. Research on digital image edge detection algorithm[J]. Application of Electronic Technique，2025，51(8)：70-73.
Research on digital image edge detection algorithm
He Zhiyong，Li Yi，Yan Song，Zhang Zhiwei
Xi’an Aerospace Propulsion Institute
Abstract： The conventional methods of digital image edge detection include Canny algorithm, Sobel algorithm, Prewitt algorithm, etc. On the basis of studying the calculation principle of the conventional methods of image edge detection, a digital image edge detection algorithm is proposed, which includes the preliminary extreme edge matrix calculation of the image, the suppression calculation of the Otsu threshold and the extension calculation of the edge. The feasibility of the proposed algorithm is verified by comparing the image edges extracted by the proposed algorithm with the image edges extracted by the conventional algorithms. The proosed algorithm and the corrventional methods are used to detect the edge of the engine nozzle burning flame image. The results show that the Sobel algorithm and the Prewitt algorithm the edge of a small amount of flame, the Canny algorithm provides the large outline of the flame, and the proposed algorithm provides a large amount of flame detail edge information. Because the edge of the combustion flame is an important feature of combustion, the proposed algorithm is more suitable for the depth analysis of the digital image edge of the nozzle burning flame, and provides a new method for the nozzle burning flame analysis.
Key words : digital image；edge detection algorithm；Otsu threshold；non-maximum value；burning flame
