（21）Laplance

这个算法还是用来进行边缘检测的

===============================

#include <opencv2/opencv.hpp>
#include <iostream>
using namespace std;
using namespace cv;

Mat src, dst, gray_src;

int main(int agrc, char** agrv) {

    src = imread("C:\Users\32829\Desktop\aa.jpg");
    if (!src.data) {
        printf("no load..
");
        return -1;
    }
    const char* input_win = "input";
    const char* out_put = "out_put";
    namedWindow(input_win, CV_WINDOW_AUTOSIZE);
    namedWindow(out_put, CV_WINDOW_AUTOSIZE);
    imshow(input_win, src);
    GaussianBlur(src, dst, Size(3, 3), 0, 0);
    cvtColor(dst, gray_src, CV_BGR2GRAY);
    Mat edge_image;
    Laplacian(gray_src, edge_image, CV_16S, 3);
    convertScaleAbs(edge_image, edge_image);
    threshold(edge_image, edge_image, 0, 255, THRESH_OTSU | THRESH_BINARY);
    imshow(out_put, edge_image);

    waitKey(0);
    return 0;
}

=============================