中文说明：Canny边缘检测的第一步是发现在水平和垂直方向的一阶导数和除去我用高斯核噪声。在下一步中，它发现梯度大小和方向来检测边缘。小于阈值的边缘将被抑制使用双阈值。最后的滞后分析，给出了输出图像的边缘；
English Description：
Canny edge detection first step involves finding first derivatives in horizontal and vertical direction and to remove noise i used Gaussian kernel. In the next step it finds gradient magnitude and direction to detect edges. edges that are less than the threshold will be suppressed using double thresholding. Finally hysteresis analysis gives you the output image with detected edges.