c++
#include"all.h"
using namespace std;
using namespace cv;
void pyramid_up1(Mat &image, vector<Mat> &pyramid_images, int level);
void laplaian_demo(vector<Mat> &pyramid_images, Mat &image);
void MyClass::day038() {
Mat img = read(PATH + "images\\test.jpg");
vector<Mat> vec;
pyramid_up1(img, vec, 3);
laplaian_demo(vec, img);
waitKey(0);
}
void pyramid_up1(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 laplaian_demo(vector<Mat> &pyramid_images, Mat &image) {
//laplaian金字塔每层都比gaussian金字塔大一倍
Mat dst;
for (int i = pyramid_images.size() - 1; i >= 0; i--) {
if (i - 1 >= 0) {
pyrUp(pyramid_images[i], dst, pyramid_images[i - 1].size());
subtract(pyramid_images[i - 1], dst, dst);
dst = dst + Scalar(127, 127, 127);
imshow(format("laplaian_layer_%d", i), dst);
}
else {
pyrUp(pyramid_images[i], dst, image.size());
subtract(image, dst, dst);
dst = dst + Scalar(127, 127, 127);
imshow(format("laplaian_layer_%d", i), dst);
}
}
}
c++中的新知识点：
由高斯金字塔构造拉普拉斯金字塔：高斯金字塔中，从第i层开始，Laplacian金字塔中的第i层为：高斯金字塔第i - 1层减去高斯金字塔中第i层放大到第i - 1层大小的图片
