opencv_laplacian.cpp

//============================================================================
// Name        : Sample243_01.cpp
// Author      : 
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <cv.h>
#include <highgui.h>

using namespace cv;

int main(int argc, char** argv){
  Mat jpeg, gray, tmp_img;

	jpeg = imread("your file path", 1);
	cvtColor(jpeg, gray, CV_BGR2GRAY);

	Mat laplacian_img;
	Laplacian(jpeg, tmp_img, CV_32F, 3);
	convertScaleAbs(tmp_img, laplacian_img, 1, 0);

	namedWindow("Display Image", CV_WINDOW_AUTOSIZE);
	imshow("Display Image", laplacian_img);

	waitKey(0);

	return 0;
}