samples/cpp/tutorial_code/ImgProc/Pyramids/Pyramids.cpp

一個使用 pyrDown 和 pyrUp 函式的例子

 
#include "iostream"
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
 
using namespace std;
using namespace cv;
 
const char* window_name = "金字塔演示";
 
int main( int argc, char** argv )
{
cout << "\n 放大縮小演示 \n "
            "------------------ \n"
            " * [i] -> 放大 \n"
            " * [o] -> 縮小 \n"
            " * [ESC] -> 關閉程式 \n" << endl;
 
    const char* filename = argc >=2 ? argv[1] : "chicky_512.png";
 
    // 載入影像
    Mat src = imread( samples::findFile( filename ) );
 
    // 檢查影像是否載入成功
    if(src.empty()){
printf(" 錯誤：無法開啟影像\n");
printf(" 程式引數: [image_name -- 預設 chicky_512.png] \n");
        return EXIT_FAILURE;
    }
 
    for(;;)
    {
imshow( window_name, src );
        char c = (char)waitKey(0);
 
        if( c == 27 )
{ break; }
        else if( c == 'i' )
{ pyrUp( src, src, Size( src.cols*2, src.rows*2 ) );
printf( "** 放大：影像 x 2 \n" );
        }
        else if( c == 'o' )
{ pyrDown( src, src, Size( src.cols/2, src.rows/2 ) );
printf( "** 縮小：影像 / 2 \n" );
        }
    }
 
    return EXIT_SUCCESS;
}