. Laplace Operator

#include “opencv2/imgproc.hpp”
#include “opencv2/imgcodecs.hpp”
#include “opencv2/highgui.hpp”

using namespace cv;

int main( int argc, char** argv )
{
// Declare the variables we are going to use
Mat src, src_gray, dst;
int kernel_size = 3;
int scale = 1;
int delta = 0;
int ddepth = CV_16S;
const char* window_name = “Laplace Demo”;
const char* imageName = “…/test.jpg”;
src = imread( samples::findFile( imageName ), IMREAD_COLOR ); // Load an image
// Check if image is loaded fine
if(src.empty()){
printf(" Error opening image\n");
return -1;
}
// Reduce noise by blurring with a Gaussian filter ( kernel size = 3 )
GaussianBlur( src, src, Size(3, 3), 0, 0, BORDER_DEFAULT );
cvtColor( src, src_gray, COLOR_BGR2GRAY ); // Convert the image to grayscale
Mat abs_dst;
Laplacian( src_gray, dst, ddepth, kernel_size, scale, delta, BORDER_DEFAULT );
// converting back to CV_8U
convertScaleAbs( dst, abs_dst );
imshow( window_name, abs_dst );
waitKey(0);
return 0;
}