c++

#include"all.h"
using namespace std;
using namespace cv;
void pyramid_up(Mat &image, vector<Mat> &pyramid_images, int level);
void pyramid_down(vector<Mat> pyramid_images);
void MyClass::day037() {
    Mat img = read(PATH + "images\\test.jpg");
    imshow("input", img);
    vector<Mat> vec;
    pyramid_up(img, vec, 3);
    pyramid_down(vec);
    waitKey(0);
}
void pyramid_up(Mat &image, vector<Mat> &pyramid_images, int level) {
    Mat temp = image.clone();
    Mat dst;
    for (int i = 0; i < level; i++) {
        pyrDown(temp, dst);
        temp = dst.clone();
        pyramid_images.push_back(temp);
    }
}
void pyramid_down(vector<Mat> pyramid_images) {
    Mat dst;
    for (int i = pyramid_images.size() - 1; i >= 0; i--) {
        pyrUp(pyramid_images[i], dst);
        imshow(format("pyramid_down_%d", i), dst);
    }
}

c++中的新知识点
pyrUp:从小到大回复金字塔中的图像
pyrDown:从大到小构造金字塔，原图不在金字塔内