1、得到一个尺寸是原图1/2的图像
2、代码
#include <opencv2/opencv.hpp>
void help(char** argv ) {
std::cout << "\n"
<< "2-06: AUsing cv::pyrDown() to create a new image that is half the width and"
<< " height of the input image\n"
<< argv[0] <<" <path/image>\n"
<< "For example:\n"
<< argv[0] << " ../faces.png\n"
<< std::endl;
}
int main( int argc, char** argv ) {
if (argc != 2) {
help(argv);
return 0;
}
cv::Mat img1,img2;
cv::namedWindow( "Example 2-6-in", cv::WINDOW_AUTOSIZE );
cv::namedWindow( "Example 2-6-out", cv::WINDOW_AUTOSIZE );
img1 = cv::imread( argv[1] );
cv::imshow( "Example 2-6-in", img1 );
cv::pyrDown( img1, img2); //降采样
cv::imshow( "Example 2-6-out", img2 );
cv::waitKey(0);
return 0;
};
