边沿算法

下面是matlab自带的edge函数的全部算法，只要调用就可以了，你没有要求，所以要代码是没有意义的。

BW = edge(I, sobel )
BW = edge(I, sobel ,thresh)
BW = edge(I, sobel ,thresh,direction)
[BW,thresh] = edge(I, sobel ,...)
BW = edge(I, prewitt )
BW = edge(I, prewitt ,thresh)
BW = edge(I, prewitt ,thresh,direction)
[BW,thresh] = edge(I, prewitt ,...)
BW = edge(I, roberts )
BW = edge(I, roberts ,thresh)
[BW,thresh] = edge(I, roberts ,...)
BW = edge(I, log )
BW = edge(I, log ,thresh)
BW = edge(I, log ,thresh,sigma)
[BW,threshold] = edge(I, log ,...)
BW = edge(I, zerocross ,thresh,h)
[BW,thresh] = edge(I, zerocross ,...)
BW = edge(I, canny )
BW = edge(I, canny ,thresh)
BW = edge(I, canny ,thresh,sigma)

在matlab里倒是提供了许多边缘处理的算法，可找不到源码，如果需要源码，需要根据各种算法自己编写