/** * @file Laplace_Demo.cpp * @brief Sample code showing how to detect edges using the Laplace operator * @author OpenCV team */ #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/imgcodecs.hpp" #include "opencv2/highgui/highgui.hpp" #include <stdlib.h> #include <stdio.h> using namespace cv; /** * @function main */ int main( int, char** argv ) { 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"; /// Load an image src = imread( argv[1] ); if( src.empty() ) { return -1; } /// Remove noise by blurring with a Gaussian filter GaussianBlur( src, src, Size(3,3), 0, 0, BORDER_DEFAULT ); /// Convert the image to grayscale cvtColor( src, src_gray, COLOR_RGB2GRAY ); /// Create window namedWindow( window_name, WINDOW_AUTOSIZE ); /// Apply Laplace function Mat abs_dst; Laplacian( src_gray, dst, ddepth, kernel_size, scale, delta, BORDER_DEFAULT ); convertScaleAbs( dst, abs_dst ); /// Show what you got imshow( window_name, abs_dst ); waitKey(0); return 0; }