mirror of
https://github.com/opencv/opencv.git
synced 2024-12-11 22:59:16 +08:00
67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
/**
|
|
* @file Pyramids.cpp
|
|
* @brief Sample code of image pyramids (pyrDown and pyrUp)
|
|
* @author OpenCV team
|
|
*/
|
|
|
|
#include "opencv2/imgproc.hpp"
|
|
#include "opencv2/imgcodecs.hpp"
|
|
#include "opencv2/highgui.hpp"
|
|
|
|
using namespace cv;
|
|
|
|
/// Global variables
|
|
Mat src, dst, tmp;
|
|
|
|
const char* window_name = "Pyramids Demo";
|
|
|
|
|
|
/**
|
|
* @function main
|
|
*/
|
|
int main( void )
|
|
{
|
|
/// General instructions
|
|
printf( "\n Zoom In-Out demo \n " );
|
|
printf( "------------------ \n" );
|
|
printf( " * [u] -> Zoom in \n" );
|
|
printf( " * [d] -> Zoom out \n" );
|
|
printf( " * [ESC] -> Close program \n \n" );
|
|
|
|
/// Test image - Make sure it s divisible by 2^{n}
|
|
src = imread( "../data/chicky_512.png" );
|
|
if( src.empty() )
|
|
{ printf(" No data! -- Exiting the program \n");
|
|
return -1; }
|
|
|
|
tmp = src;
|
|
dst = tmp;
|
|
|
|
/// Create window
|
|
namedWindow( window_name, WINDOW_AUTOSIZE );
|
|
imshow( window_name, dst );
|
|
|
|
/// Loop
|
|
for(;;)
|
|
{
|
|
int c;
|
|
c = waitKey(10);
|
|
|
|
if( (char)c == 27 )
|
|
{ break; }
|
|
if( (char)c == 'u' )
|
|
{ pyrUp( tmp, dst, Size( tmp.cols*2, tmp.rows*2 ) );
|
|
printf( "** Zoom In: Image x 2 \n" );
|
|
}
|
|
else if( (char)c == 'd' )
|
|
{ pyrDown( tmp, dst, Size( tmp.cols/2, tmp.rows/2 ) );
|
|
printf( "** Zoom Out: Image / 2 \n" );
|
|
}
|
|
|
|
imshow( window_name, dst );
|
|
tmp = dst;
|
|
}
|
|
|
|
return 0;
|
|
}
|