The digital image processing technology and its application in infrared diagnosing of PCBs fault is studied, and the edge inspection of image is given by Roberts, Sobel, Prewitt, Laplacian, Canny methods.

• 研究了数字图像处理技术在红外诊断中的应用，并对PCBs红外图像运用Roberts、Sobel、Prewitt、Laplacian、Canny等方法进行了边缘检测;