[Learning OpenCV] Image Sobel, Laplacian, canny edge detection

Http://www.cnblogs.com/tiandsp/archive/2013/04/20/3032860.html

Three kinds of common edge detection operators.

#include "cv.h"
#include "highgui.h"

using namespace CV;

int main (int argc, char* argv[])
{
        Mat src = imread ("misaka.jpg");
        Mat DST;
    
        Input image
        //output image
        //input Image Color channel number
        //x direction order number
        //y Direction order
        Sobel (Src,dst,src.depth (), n);
        Imwrite ("Sobel.jpg", DST);

        Input image
        //output image
        //input Image Color channel number
        Laplacian (src,dst,src.depth ());
        Imwrite ("Laplacian.jpg", DST);

        Input image
        //output image
        //color turn grayscale
        cvtcolor (src,src,cv_bgr2gray);  Canny processing only grayscale image

        //input image//
        output image
        //Low threshold
        //High threshold value, OPENCV recommended is low threshold value of 3 times times
        //Internal Sobel filter size
        Canny (src , dst,50,150,3);    
        Imwrite ("Canny.jpg", DST);

        Imshow ("DST", DST);
        Waitkey ();

        return 0;
}