1 /** 2 * @file copyMakeBorder_demo.cpp 3 * @brief Sample code that shows the functionality of copyMakeBorder 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 /// Global Variables 16 Mat src, dst; 17 int top, bottom, left, right; 18 int borderType; 19 const char* window_name = "copyMakeBorder Demo"; 20 RNG rng(12345); 21 22 /** 23 * @function main 24 */ 25 int main( int, char** argv ) 26 { 27 28 int c; 29 30 /// Load an image 31 src = imread( argv[1] ); 32 33 if( src.empty() ) 34 { 35 printf(" No data entered, please enter the path to an image file \n"); 36 return -1; 37 } 38 39 /// Brief how-to for this program 40 printf( "\n \t copyMakeBorder Demo: \n" ); 41 printf( "\t -------------------- \n" ); 42 printf( " ** Press 'c' to set the border to a random constant value \n"); 43 printf( " ** Press 'r' to set the border to be replicated \n"); 44 printf( " ** Press 'ESC' to exit the program \n"); 45 46 /// Create window 47 namedWindow( window_name, WINDOW_AUTOSIZE ); 48 49 /// Initialize arguments for the filter 50 top = (int) (0.05*src.rows); bottom = (int) (0.05*src.rows); 51 left = (int) (0.05*src.cols); right = (int) (0.05*src.cols); 52 dst = src; 53 54 imshow( window_name, dst ); 55 56 for(;;) 57 { 58 c = waitKey(500); 59 60 if( (char)c == 27 ) 61 { break; } 62 else if( (char)c == 'c' ) 63 { borderType = BORDER_CONSTANT; } 64 else if( (char)c == 'r' ) 65 { borderType = BORDER_REPLICATE; } 66 67 Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) ); 68 copyMakeBorder( src, dst, top, bottom, left, right, borderType, value ); 69 70 imshow( window_name, dst ); 71 } 72 73 return 0; 74 } 75
