99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
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/**
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* @function Remap_Demo.cpp
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* @brief Demo code for Remap
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* @author Ana Huaman
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*/
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#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/imgproc/imgproc.hpp"
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#include <iostream>
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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;
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Mat map_x, map_y;
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char* remap_window = "Remap demo";
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int ind = 0;
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/// Function Headers
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void update_map( void );
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/**
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* @function main
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*/
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int main( int argc, char** argv )
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{
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/// Load the image
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src = imread( argv[1], 1 );
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/// Create dst, map_x and map_y with the same size as src:
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dst.create( src.size(), src.type() );
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map_x.create( src.size(), CV_32FC1 );
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map_y.create( src.size(), CV_32FC1 );
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/// Create window
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namedWindow( remap_window, CV_WINDOW_AUTOSIZE );
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/// Loop
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while( true )
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{
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/// Each 1 sec. Press ESC to exit the program
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int c = waitKey( 1000 );
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if( (char)c == 27 )
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{ break; }
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/// Update map_x & map_y. Then apply remap
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update_map();
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remap( src, dst, map_x, map_y, CV_INTER_LINEAR, BORDER_CONSTANT, Scalar(0, 0, 0) );
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// Display results
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imshow( remap_window, dst );
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}
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return 0;
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}
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/**
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* @function update_map
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* @brief Fill the map_x and map_y matrices with 4 types of mappings
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*/
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void update_map( void )
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{
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ind = ind%4;
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for( int j = 0; j < src.rows; j++ )
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{ for( int i = 0; i < src.cols; i++ )
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{
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switch( ind )
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{
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case 0:
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if( i > src.cols*0.25 && i < src.cols*0.75 && j > src.rows*0.25 && j < src.rows*0.75 )
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{
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map_x.at<float>(j,i) = 2*( i - src.cols*0.25 ) + 0.5 ;
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map_y.at<float>(j,i) = 2*( j - src.rows*0.25 ) + 0.5 ;
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}
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else
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{ map_x.at<float>(j,i) = 0 ;
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map_y.at<float>(j,i) = 0 ;
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}
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break;
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case 1:
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map_x.at<float>(j,i) = i ;
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map_y.at<float>(j,i) = src.rows - j ;
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break;
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case 2:
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map_x.at<float>(j,i) = src.cols - i ;
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map_y.at<float>(j,i) = j ;
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break;
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case 3:
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map_x.at<float>(j,i) = src.cols - i ;
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map_y.at<float>(j,i) = src.rows - j ;
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break;
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} // end of switch
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}
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}
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ind++;
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}
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