OpenCV 图像金字塔的实现示例

c++ void cv::pyrDown(cv::InputArray src, cv::OutputArray dst, 
                     const cv::Size &dstsize = cv::Size(), int borderType = 4)

C++ void cv::pyrUp(cv::InputArray src, cv::OutputArray dst, 
                   const cv::Size &dstsize = cv::Size(), int borderType = 4)

#include<opencv2/opencv.hpp>
#include<iOStream>
#include<imgproc.hpp>
using namespace cv;
using namespace std;
 
int main(int arGC, char** argv) {
	Mat image = imread("C:/Users/YY/Pictures/Saved Pictures/1.jpg");
	Mat out;
	imshow("原图", image);
	pyrDown(image, out);
	imshow("降采样", out);
	pyrUp(out, out);
	imshow("上采样", out);
	subtract(image, out, out);
	imshow("拉普拉斯金字塔", out);
	waiTKEy(0);
	destroyAllwindows();
	return 0;
}