img2 = cv2.blur(img, (9, 9))将这句python转换成C++

以下是将Python中的`cv2.blur(img, (9, 9))`转换为C++的代码：

cv::Mat img2;
cv::blur(img, img2, cv::Size(9, 9));

需要注意的是，C++中的`cv::Mat`和Python中的`img`可能有不同的数据类型和通道数。因此，在使用前需要先确认两者的数据类型和通道数是否一致。

相关问题

def find_center(img): h, w = img.shape roi_h = int(h * 2 / 3) roi_img = img[roi_h:, :] img_blur = cv2.GaussianBlur(roi_img, (15, 15), 0) # 高斯模糊 ret, th2 = cv2.threshold(img_blur, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU) g2 = cv2.getStructuringElement(cv2.MORPH_RECT, (3, 3)) open_img = cv2.morphologyEx(th2, cv2.MORPH_OPEN, g2, iterations=3) x_sum = np.sum(open_img, axis=0) x_point = np.where(x_sum > 0) point_x = int((x_point[0][0] + x_point[0][-1]) / 2) # print(roi_h, w) # np.savetxt('reshape_data.txt', x_point, delimiter=' ', fmt='%i') return point_x c++ opencv实现

以下是使用C++和OpenCV实现该函数的代码：

#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>

int find_center(cv::Mat img) {
    int h = img.rows;
    int w = img.cols;
    int roi_h = static_cast<int>(h * 2 / 3);
    cv::Mat roi_img = img(cv::Rect(0, roi_h, w, h - roi_h));
    cv::GaussianBlur(roi_img, roi_img, cv::Size(15, 15), 0);
    cv::Mat th2;
    cv::threshold(roi_img, th2, 0, 255, cv::THRESH_BINARY + cv::THRESH_OTSU);
    cv::Mat g2 = cv::getStructuringElement(cv::MORPH_RECT, cv::Size(3, 3));
    cv::morphologyEx(th2, th2, cv::MORPH_OPEN, g2, cv::Point(-1, -1), 3);
    cv::Mat x_sum = cv::Mat::zeros(1, w, CV_32FC1);
    for (int i = 0; i < w; i++) {
        for (int j = 0; j < h - roi_h; j++) {
            if (th2.at<uchar>(j, i) > 0) {
                x_sum.at<float>(0, i)++;
            }
        }
    }
    int min_idx, max_idx;
    cv::minMaxIdx(x_sum, nullptr, nullptr, &min_idx, &max_idx);
    int point_x = (min_idx + max_idx) / 2;
    return point_x;
}

注意，由于C++和Python的数值类型不同，因此我们需要使用`cv::Mat`类来处理图像数据，而不是使用`np.array`。此外，还需要使用`cv::Rect`类来裁剪图像，并使用`cv::Point`类来指定卷积核中心的位置。

将以下的python程序转化为c++版本，并在vs2022上实现。import cv2 import numpy as np from skimage.transform import radon import os thre1=10 thre2=-10 r=60 maxVal = 0 index = 0 sequence_path = "./images/" for file in os.listdir(sequence_path): filename=os.path.join(sequence_path, file) image=cv2.imread(filename, 0) image=cv2.blur(image,(3,3)) img=np.zeros((len(image), len(image[0])),np.uint8) maxVal = 0 index = 0 retval, labels, stats, centroids = cv2.connectedComponentsWithStats(img, connectivity=8) for i in range(1, len(stats)): if stats[i][4] > maxVal: maxVal = stats[i][4] index = i #x,y,h,w s for i in range(len(labels)): for j in range(len(labels[0])): if labels[i][j]==index: labels[i][j]=255 else: labels[i][j] = 0 cv2.imwrite('./4-max_region.jpg',labels) img2=cv2.imread('./4-max_region.jpg',0) img3=cv2.Canny(img2,15,200) # theta = np.linspace(0, 180, endpoint=False) img4 = radon(img3) max_angel=0 for i in range(len(img4)): for j in range(len(img4[0])): if img4[i][j]>max_angel: max_angel=img4[i][j] angel=j print("{}方向为：{} °".format(filename,angel))

在VS2022上实现这段Python代码的C++版本，你可以使用以下代码作为参考：

#include <iostream>
#include <opencv2/opencv.hpp>
#include <opencv2/core.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/ml.hpp>
#include <opencv2/imgcodecs.hpp>
#include <vector>
#include <cmath>
#include <algorithm>

using namespace std;
using namespace cv;

int main() {
    int thre1 = 10;
    int thre2 = -10;
    int r = 60;
    int maxVal = 0;
    int index = 0;
    string sequence_path = "./images/";

    for (const auto &entry : filesystem::directory_iterator(sequence_path)) {
        string filename = entry.path().string();
        Mat image = imread(filename, IMREAD_GRAYSCALE);
        blur(image, image, Size(3,3));
        Mat img(image.rows, image.cols, CV_8U, Scalar(0));

        maxVal = 0;
        index = 0;

        Mat labels, stats, centroids;
        int retval = connectedComponentsWithStats(img, labels, stats, centroids, 8);

        for (int i = 1; i < stats.rows; i++) {
            if (stats.at<int>(i, CC_STAT_AREA) > maxVal) {
                maxVal = stats.at<int>(i, CC_STAT_AREA);
                index = i;
            }
        }

        for (int i = 0; i < labels.rows; i++) {
            for (int j = 0; j < labels.cols; j++) {
                if (labels.at<int>(i, j) == index)
                    labels.at<int>(i, j) = 255;
                else
                    labels.at<int>(i, j) = 0;
            }
        }

        imwrite("./4-max_region.jpg", labels);
        Mat img2 = imread("./4-max_region.jpg", IMREAD_GRAYSCALE);
        Mat img3;
        Canny(img2, img3, 15, 200);

        Mat img4;
        radon(img3, img4);

        int max_angel = 0;
        int angel = 0;

        for (int i = 0; i < img4.rows; i++) {
            for (int j = 0; j < img4.cols; j++) {
                if (img4.at<float>(i, j) > max_angel) {
                    max_angel = img4.at<float>(i, j);
                    angel = j;
                }
            }
        }

        cout << filename << " 方向为：" << angel << " °" << endl;
    }

    return 0;
}

请注意，你需要在项目中添加OpenCV库的链接。此外，代码中使用了C++17的filesystem库进行文件遍历，因此你需要在编译时启用C++17标准。