EmguCV C++ 转换 C# EmguCV答案

【问题标题】：EmguCV C++ to convert C# EmguCVEmguCV C++ 转换 C# EmguCV
【发布时间】：2014-09-09 23:17:09
【问题描述】：

我正在尝试使用 EmguCV 在通道 H 中进行像素计数，大多数在 C ++ 中都有此代码，并且希望将 EmguCV c ++ 的部分转换为 C#，尤其是部分 uchartone = comp [ 0] .at (i, j);这让我很头疼，如果你能帮助我，非常感谢？

这是代码：

ProcessadorImagem::calculaHistograma(cv::Mat imagem, DadosImagem* dadosImagem) {

cv::Mat hls;
cv::cvtColor(imagem, hls, CV_RGB2HLS_FULL);     
cv::Mat* comp = new cv::Mat[3];
cv::split(hls, comp);

for (int i = 0; i < imagem.rows; i++)
    for (int j = 0; j < imagem.cols; j++) {
        uchar tom = comp[0].at<uchar>(i, j);

        for (int k = 0; k < dadosImagem->getHistograma().size(); k++) {
            uchar min = dadosImagem->getHistograma()[k]->getLimiteInicial();
            uchar max = dadosImagem->getHistograma()[k]->getLimiteFinal();

            if (tom >= min && tom <= max) {

                int contagem = dadosImagem->getHistograma()[k]->getContagemPixels();
                dadosImagem->getHistograma()[k]->setContagemPixels(contagem + 1);

                break;
            }
        }
    }

}

【问题讨论】：

这行“uchar tom = comp[0].at(i, j);”有什么问题？你想知道如何计算 (i,j) 处的像素值吗？
是的，它甚至知道使用带有 emgucv 的 C# 来做到这一点的更好方法

标签： c# c++ c opencv

【解决方案1】：

public class ColorDetails
{
    public Hsv hueLowerLimit { get; set; }
    public Hsv hueUpperLimit { get; set; }

}

        hueLowerLimit = new Hsv(hueLow, satLow, valLow);
        hueUpperLimit = new Hsv(hueHigh, satHigh, valHigh);

====================

ColorDetails element = // add hue upperlimit and lower limit here
Image<Gray, byte> filteredImage = null;

//function to filter out a specified hue range 
if (element.hueLowerLimit.Hue > element.hueUpperLimit.Hue)
{
    filteredImage = hsvImage.InRange(element.hueLowerLimit, new Hsv(180, element.hueUpperLimit.Satuation, element.hueUpperLimit.Value))
    .Add(hsvImage.InRange(new Hsv(0, element.hueLowerLimit.Satuation, element.hueLowerLimit.Value), element.hueUpperLimit));
}
else
{
    filteredImage = hsvImage.InRange(element.hueLowerLimit, element.hueUpperLimit);
}

/*                        
//for debugging
Image<Bgr, Byte> masked = new Image<Bgr, byte>(image.Size);
image.Copy(masked, filteredImage);
Console.WriteLine("Color Count : " + filteredImage.CountNonzero()[0]);
CvInvoke.Imshow("out", masked);
CvInvoke.WaitKey(0);
*/

//this is the pixel count of a particular hue range
filteredImage.CountNonzero()[0]

【讨论】：