说明：  1.选择3种边缘检测算子对一幅图像进行边缘检测，显示检测结果，对检测结果进行比较分析。 2.对混有高斯噪声的图像进行边缘处理，比较各边缘检测算子对噪声的敏感性。
(1. Choice of three kinds of edge detection operator of an image edge detection, test results show that, on a comparative analysis of test results. 2. For a mixture of Gaussian noise the edge of the image processing, edge detection for each operator to noise sensitivity.)