matlab程序求图像的梯度，获得图像的纹理信息丰富的点或边缘点、角点等。-to get the gradient of mage, the image texture information rich points or edge, corner, etc.

用kinect获取3D图像，并从3D图像中用OpenCV方法从深度图中获取梯度边缘，从而得到更多信息，做后续处理-Get with kinect 3D images, and get the edge gradient from the depth map from a 3D image using OpenCV method to obtain more information, do follow-up treatment