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 */
main(int,char ** argv)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