8a4a1bb018
1. someMatrix.data -> someMatrix.prt() 2. someMatrix.data + someMatrix.step * lineIndex -> someMatrix.ptr( lineIndex ) 3. (SomeType*) someMatrix.data -> someMatrix.ptr<SomeType>() 4. someMatrix.data -> !someMatrix.empty() ( or !someMatrix.data -> someMatrix.empty() ) in logical expressions
70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
/**
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* @file Pyramids.cpp
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* @brief Sample code of image pyramids (pyrDown and pyrUp)
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* @author OpenCV team
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*/
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#include "opencv2/imgproc/imgproc.hpp"
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#include "opencv2/imgcodecs.hpp"
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#include "opencv2/highgui/highgui.hpp"
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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using namespace cv;
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/// Global variables
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Mat src, dst, tmp;
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const char* window_name = "Pyramids Demo";
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/**
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* @function main
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*/
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int main( void )
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{
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/// General instructions
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printf( "\n Zoom In-Out demo \n " );
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printf( "------------------ \n" );
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printf( " * [u] -> Zoom in \n" );
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printf( " * [d] -> Zoom out \n" );
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printf( " * [ESC] -> Close program \n \n" );
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/// Test image - Make sure it s divisible by 2^{n}
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src = imread( "../images/chicky_512.png" );
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if( src.empty() )
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{ printf(" No data! -- Exiting the program \n");
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return -1; }
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tmp = src;
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dst = tmp;
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/// Create window
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namedWindow( window_name, WINDOW_AUTOSIZE );
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imshow( window_name, dst );
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/// Loop
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for(;;)
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{
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int c;
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c = waitKey(10);
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if( (char)c == 27 )
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{ break; }
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if( (char)c == 'u' )
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{ pyrUp( tmp, dst, Size( tmp.cols*2, tmp.rows*2 ) );
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printf( "** Zoom In: Image x 2 \n" );
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}
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else if( (char)c == 'd' )
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{ pyrDown( tmp, dst, Size( tmp.cols/2, tmp.rows/2 ) );
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printf( "** Zoom Out: Image / 2 \n" );
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}
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imshow( window_name, dst );
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tmp = dst;
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}
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return 0;
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}
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