基于相位一致性的煤矸边缘检测方法

摘要

煤矸识别以往常常采用对噪声敏感的梯度算子提取边缘,但工作场所粉尘较大,光线暗,图像清晰度差,识别效果往往不理想.为提高自动分选率,将相位一致性应用到煤矸边缘检测中,阐述了相位一致性的基本原理,并以现场图片处理效果表明,相位一致性检测图像特征的方法可以准确的提取煤块与矸石边缘,不受亮度与对比度影响.%In the past,gradient operator was widely used in edge extraction of coal and gangue. But it is noise-sensi?tive,and the workplace is dust,dark,then image is not clear,so the detection results are often unsatisfactory. In or?der to improve automatic sorting rate,the phase congruency is applied to the edge detection and it describe the ba?sic principles of phase congruency. The processing effects of live pictures shows that,this detection method can ac?curately extract edges of coal and gangue,and is invariant to changes in brightness or contrast.