c++

#include"all.h"
using namespace std;
using namespace cv;

void MyClass::day039() {
    Mat origin = read(PATH + "images\\origin.jpg");
    Mat temp = read(PATH + "images\\template.jpg");
    int r_row = origin.rows - temp.rows + 1; int r_col = origin.cols - temp.cols + 1;
    Mat result = Mat::zeros(Size(r_col, r_row), CV_32FC1);
    matchTemplate(origin, temp, result, TM_CCOEFF_NORMED);
    imshow("result", result);
    const float t = 0.95;
    int h = result.rows; int w = result.cols;
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            float v = result.at<float>(i, j);
            if (v > t) {
                rectangle(origin, Point(j, i), Point(j + temp.cols, i + temp.rows), Scalar(255, 0, 0),
                    1, 8, 0);
            }
        }
    }
    imshow("template matched result", origin);
    waitKey(0);
}

c++中的新知识点
matchTemplate()：用于在某图片中寻找temp图片的匹配，实际上是个卷积操作，结果为某位置领域图片和temp匹配的概率
rectangle()：给出左上角和右下角坐标后，在该位置画指定大小的框