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
75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
/**
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* @file copyMakeBorder_demo.cpp
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* @brief Sample code that shows the functionality of copyMakeBorder
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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 <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;
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int top, bottom, left, right;
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int borderType;
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const char* window_name = "copyMakeBorder Demo";
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RNG rng(12345);
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/**
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* @function main
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*/
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int main( int, char** argv )
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{
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int c;
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/// Load an image
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src = imread( argv[1] );
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if( src.empty() )
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{
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printf(" No data entered, please enter the path to an image file \n");
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return -1;
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}
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/// Brief how-to for this program
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printf( "\n \t copyMakeBorder Demo: \n" );
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printf( "\t -------------------- \n" );
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printf( " ** Press 'c' to set the border to a random constant value \n");
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printf( " ** Press 'r' to set the border to be replicated \n");
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printf( " ** Press 'ESC' to exit the program \n");
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/// Create window
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namedWindow( window_name, WINDOW_AUTOSIZE );
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/// Initialize arguments for the filter
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top = (int) (0.05*src.rows); bottom = (int) (0.05*src.rows);
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left = (int) (0.05*src.cols); right = (int) (0.05*src.cols);
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dst = src;
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imshow( window_name, dst );
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for(;;)
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{
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c = waitKey(500);
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if( (char)c == 27 )
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{ break; }
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else if( (char)c == 'c' )
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{ borderType = BORDER_CONSTANT; }
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else if( (char)c == 'r' )
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{ borderType = BORDER_REPLICATE; }
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Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) );
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copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
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imshow( window_name, dst );
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}
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return 0;
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}
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