说明：  本代码是把二值图像转换成边缘检测图像国，是通过C语言和M语言混编的。
(This code converts a BW image to an Edge Detected image in C with MEX. This code implements convolution with Sobel kernels to do the edge detection. I put this together for a school project and I couldn t find any good examples of MEX with image processing. One note the code is currently hard coded to handle only UINT8, however it should be trivial to convert that data type. Enjoy.)