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/**
* @file Pyramids.cpp
* @brief Sample code of image pyramids (pyrDown and pyrUp)
* @author OpenCV team
*/
#include "iostream"
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
using namespace std;
using namespace cv;
const char* window_name = "Pyramids Demo";
/**
* @function main
*/
int main( int argc, char** argv )
{
/// General instructions
cout << "\n Zoom In-Out demo \n "
"------------------ \n"
" * [i] -> Zoom in \n"
" * [o] -> Zoom out \n"
" * [ESC] -> Close program \n" << endl;
//![load]
const char* filename = argc >=2 ? argv[1] : "chicky_512.png";
// Loads an image
Mat src = imread( samples::findFile( filename ) );
// Check if image is loaded fine
if(src.empty()){
printf(" Error opening image\n");
printf(" Program Arguments: [image_name -- default chicky_512.png] \n");
return EXIT_FAILURE;
}
//![load]
//![loop]
for(;;)
{
//![show_image]
imshow( window_name, src );
//![show_image]
char c = (char)waitKey(0);
if( c == 27 )
{ break; }
//![pyrup]
else if( c == 'i' )
{ pyrUp( src, src, Size( src.cols*2, src.rows*2 ) );
printf( "** Zoom In: Image x 2 \n" );
}
//![pyrup]
//![pyrdown]
else if( c == 'o' )
{ pyrDown( src, src, Size( src.cols/2, src.rows/2 ) );
printf( "** Zoom Out: Image / 2 \n" );
}
//![pyrdown]
}
//![loop]
return EXIT_SUCCESS;
}
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