在openCV中逐像素复制

Question

我有一个代码可以将一个视频复制到另一个视频当我以某种方式复制它时，角度会发生变化

这是一张link的图片

http://i24.photobucket.com/albums/c22/Klifford_Kho/wrongpixel_zpsloshtqqy.png

 Mat frame;
Mat processedImage;





void copy()
{


for (int i = 0; i<400; i++)
{
    for (int j = 0; j<200; j++)
    {

        int b = frame.at<cv::Vec3b>(i, j)[0];
        int g = frame.at<cv::Vec3b>(i, j)[1];
        int r = frame.at<cv::Vec3b>(i, j)[2];


        processedImage.at<cv::Vec3b>(i, j)[0] = b;
        processedImage.at<cv::Vec3b>(i, j)[1] = g;
        processedImage.at<cv::Vec3b>(i, j)[2] = r;


    }
}



int main()
{
VideoCapture cap(0); // get first cam
while (cap.isOpened())
{

    if (!cap.read(frame)) // cam might need some warmup
        continue;
    processedImage = cv::Mat(frame.size().height, frame.size().width, CV_8UC1);
    processedImage.setTo(cv::Scalar::all(0));

    copy();




    imshow("Original", frame);
    imshow("Processed", processedImage);
    if (waitKey(10) == 27)
        break;
}
return 0;

}

P.S。我没有在条件中使用 frame.cols 和 frame.rows 因为它产生了一个错误这是错误的图片 http://i24.photobucket.com/albums/c22/Klifford_Kho/wrongpixel_zpswze5qjrr.png

Answer 1

这是因为您创建了单通道目标图像。

processedImage = cv::Mat(frame.size().height, frame.size().width, CV_8UC1);

将CV_8UC1更改为CV_8UC3，它应该也有助于解决问题末尾提到的错误。

在openCV中逐像素复制

copying pixel by pixel in openCV

opencv

visual-c++