中文说明：对写入图像进行边缘检测，有canny算子，soble算子，log算子，Robert算子等，读入图像后先对彩色图像进行彩色变灰度处理，然后分别用几种边缘检测算子对灰度图像进行处理，显示在同一张图片里，有清晰的对比！
English Description：
Write image edge detection, a canny operator, soble operator log operator, Robert operator, reads in the image to color change the color image to grayscale, then used several edge detection operators for image processing, and appear in the same picture, there is a clear contrast!