C++如何使用OpenCV处理图像_C++计算机视觉库OpenCV的图像读取、处理与保存

#include <opencv2/opencv.hpp>
#include <iostream>

int main() {
    cv::Mat image = cv::imread("input.jpg");

    if (image.empty()) {
        std::cout << "无法加载图像，请检查路径！" << std::endl;
        return -1;
    }

    std::cout << "图像尺寸：" << image.cols << "x" << image.rows << std::endl;
    return 0;
}

cv::Mat gray;
cv::cvtColor(image, gray, cv::COLOR_BGR2GRAY);

cv::Mat blurred;
cv::GaussianBlur(gray, blurred, cv::Size(5, 5), 1.5);

cv::Mat edges;
cv::Canny(blurred, edges, 50, 150);

bool success = cv::imwrite("output_edges.jpg", edges);
if (success) {
    std::cout << "图像已保存！" << std::endl;
} else {
    std::cout << "保存失败！" << std::endl;
}

#include <opencv2/opencv.hpp>
#include <iostream>

int main() {
    cv::Mat img = cv::imread("input.jpg");
    if (img.empty()) {
        std::cout << "读取失败" << std::endl;
        return -1;
    }

    cv::Mat gray, blur, edge;
    cv::cvtColor(img, gray, cv::COLOR_BGR2GRAY);
    cv::GaussianBlur(gray, blur, cv::Size(5,5), 1.5);
    cv::Canny(blur, edge, 50, 150);

    cv::imwrite("result.png", edge);
    std::cout << "处理完成，结果已保存。" << std::endl;
    return 0;
}

g++ main.cpp -o process `pkg-config --cflags --libs opencv4`