学习c++版opencv3.4之19-Laplance算子

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Laplance算子：求图像二阶导数图像。

#include <opencv2/opencv.hpp>
#include <iostream>
#include <math.h>using namespace std;
using namespace cv;int threshold_value = 100, threshold_max = 255;
int threshold_type = 0, threshold_type_max = 4;
string outwindow = "threshold img";
Mat src, dst;
void mythreshold(int, void*);
int main(){Mat src1;src1 = imread("/Users/ming/Documents/test.jpg");resize(src1, src, Size(src1.cols/2, src1.rows/2));if (!src.data){printf("cannot load image ...");return -1;}namedWindow("src img", CV_WINDOW_AUTOSIZE);imshow("src img", src);GaussianBlur(src, dst, Size(3,3), 0);Mat src_gray;cvtColor(src, src_gray, CV_BGR2GRAY);imshow("gaussian+gray", src_gray);//laplance算子Laplacian(src_gray, dst, -1);imshow("laplance", dst);threshold(dst, dst, 0, 255, THRESH_OTSU | THRESH_BINARY);imshow("threshold", dst);
//    Mat dst_final;
//    convertScaleAbs(dst, dst_final);
//    imshow("laplance final", dst_final);waitKey(0);return 0;
}

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