利用各种算子对图像进行边缘检测。如roberts算子、sobel算子、log算子、perwitt算子四种算子，利用这四种算子分别对图像进行边界的提取。-Using a variety of operators for image edge detection. Operators such as roberts, sobel operator, log operator, perwitt operator of four operators, the use of these four operators were extracting the image boundary.