c++ - 如何保存灰度图像的黑色像素并将其绘制到另一个相同大小的灰度图像？

Question

我正在尝试保存原始灰度图像的黑色像素位置，然后想将其绘制到灰度图像的修改版本中。我的代码在这里：

std::vector< std::vector <cv::Point> > Black_Pixel;
    for(int y = 0; y < Original_Image.rows; y++)
        {
            for(int x = 0; x < Original_Image.cols; x++)
                {               
                    if (Original_Image.at<unsigned char>(x,y) == 0 )
                        {
                             Black_Pixel[0].push_back(cv::Point(x,y));
                             Black_Pixel.push_back( std::vector <cv::Point>());
                         }                                      
                }
        }

    for( unsigned int idx = 0; idx < Black_Pixel.size(); idx++ )
        {
            New_image.at<unsigned char>(Black_Pixel[0][idx].x,Black_Pixel[0][idx].y) = 0;
            cv::waitKey();
        }

Answer 1

试试这个： row.push_back(cv::Point(x,y));

实际上，带走行，而是有这个：

Black_Pixel[0].push_back(cv::Point(x,y)); 

当然你首先需要初始化 Black_Pixel 中的第 0 个元素：

Black_Pixel.push_back(std::vector<cv::Point>);

Answer 2

std::vector <cv::Point> Black_Pixel;
for(int y = 0; y < Original_Image.cols; y++)
    {
        for(int x = 0; x < Original_Image.rows; x++)
            {               
                if (Original_Image.at<unsigned char>(x,y) == 0 )
                    {
                         Black_Pixel.push_back(cv::Point(x,y));
                    }                                      
            }
    }

for( unsigned int idx = 0; idx < Black_Pixel.size(); idx++ )
    {
        New_image.at<unsigned char>(Black_Pixel[idx]) = 0;           
    }

cv::imshow("New Image", New_image);