1 /** 2 * @file Laplace_Demo.cpp 3 * @brief Sample code showing how to detect edges using the Laplace operator 4 * @author OpenCV team 5 */ 6 7 #include "opencv2/imgproc/imgproc.hpp" 8 #include "opencv2/imgcodecs.hpp" 9 #include "opencv2/highgui/highgui.hpp" 10 #include <stdlib.h> 11 #include <stdio.h> 12 13 using namespace cv; 14 15 /** 16 * @function main 17 */ 18 int main( int, char** argv ) 19 { 20 21 Mat src, src_gray, dst; 22 int kernel_size = 3; 23 int scale = 1; 24 int delta = 0; 25 int ddepth = CV_16S; 26 const char* window_name = "Laplace Demo"; 27 28 /// Load an image 29 src = imread( argv[1] ); 30 31 if( src.empty() ) 32 { return -1; } 33 34 /// Remove noise by blurring with a Gaussian filter 35 GaussianBlur( src, src, Size(3,3), 0, 0, BORDER_DEFAULT ); 36 37 /// Convert the image to grayscale 38 cvtColor( src, src_gray, COLOR_RGB2GRAY ); 39 40 /// Create window 41 namedWindow( window_name, WINDOW_AUTOSIZE ); 42 43 /// Apply Laplace function 44 Mat abs_dst; 45 46 Laplacian( src_gray, dst, ddepth, kernel_size, scale, delta, BORDER_DEFAULT ); 47 convertScaleAbs( dst, abs_dst ); 48 49 /// Show what you got 50 imshow( window_name, abs_dst ); 51 52 waitKey(0); 53 54 return 0; 55 } 56
