C++OpenCV实现像素画的示例代码

find_package(OpenCV 4 REQUIRED)

include_directories(
        ${OPENCV_INCLUDE_DIRS}
)

target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBRARIES})

std::string path = "/path/to/img/";
cv::Mat img = cv::imread(path +"meinv.jpeg");

int height = img.size().height;
int width = img.size().width;

int pixel_size = 10;

int new_width = width / pixel_size;
int new_height = height / pixel_size;

cv::Mat imgTmp;
cv::resize(img, imgTmp, cv::Size(new_width, new_height), 0, 0, cv::INTER_LINEAR);

cv::resize(imgTmp, imgTmp, cv::Size(width/2, height/2),0, 0, cv::INTER_LINEAR);

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

int main() {

    std::string path = "/Users/wbf/Desktop/";
    cv::Mat img = cv::imread(path +"meinv.jpeg");
    cv::imshow("meinv", img);
    int height = img.size().height;
    int width = img.size().width;

    int pixel_size = 10;

    int new_width = width / pixel_size;
    int new_height = height / pixel_size;

    std::cout << new_height << "," << new_width << std::endl;
    cv::Mat imgTmp;
    cv::resize(img, imgTmp, cv::Size(new_width, new_height), 0, 0, cv::INTER_LINEAR);

    cv::resize(imgTmp, imgTmp, cv::Size(width/2, height/2),0, 0, cv::INTER_LINEAR);

//    std::vector<cv::Mat> v_mat ;
//    v_mat.push_back(img);
//    v_mat.push_back(imgTmp);
    cv::imshow("meinv2" , imgTmp);
    cv::waiTKEy(0);
}