opencv 拉普拉斯算子例子

1.源码实现

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main()
{
    string file = "./1.jpg";

    Mat img = imread(file.c_str(), -1);

    pyrDown(img, img, Size(img.cols/2, img.rows/2));

    Mat gray, laplaci, final;

    //高斯模糊
    GaussianBlur(img, img, Size(5,5), 0, 0);

    //转灰度图
    cvtColor(img, gray, CV_BGR2GRAY);

    //拉普拉斯处理
    Laplacian(gray, laplaci, CV_16S, 3, 1, 0);

    //绝对值处理
    convertScaleAbs(laplaci, laplaci);

    imwrite("laplaci.jpg", laplaci);

    return 0;
}

2.编译源码

$ g++ -o test test.cpp -std=c++11 -I/usr/local/include -L/usr/local/lib -lopencv_core -lopencv_highgui -lopencv_imgproc -Wl,-rpath=/usr/local/lib

3.运行结果

1.jpg
laplaci.jpg