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

使用pyrDown和pyrUp函数的示例

 
#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 放大缩小演示 \n "
            "------------------ \n"
            " * [i] -> 放大 \n"
            " * [o] -> 缩小 \n"
            " * [ESC] -> 关闭程序 \n" << endl;
 
    const char* filename = argc >=2 ? argv[1] : "chicky_512.png";
 
    // 加载图像
    Mat src = imread( samples::findFile( filename ) );
 
    // 检查图像是否加载成功
    if(src.empty()){
printf(" 打开图像出错\n");
printf(" 程序参数：[图像名称 -- 默认 chicky_512.png] \n");
        return EXIT_FAILURE;
    }
 
    }(;;)
    {
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：图像 x 2 \n" );
        }
        else if( c == 'o' )
{ pyrDown( src, src, Size( src.cols/2, src.rows/2 ) );
printf( "** 缩小：图像 / 2 \n" );
        }
    }
 
    return EXIT_SUCCESS;
}