PROSAGA码农传奇-图像索引-OpenCV cv :: dnn :: Net :: getBlob返回dnn :: Blob

OpenCV cv :: dnn :: Net :: getBlob返回dnn :: Blob :: matRefConst有行== -1和cols == -1

作者: 逆转的风
发布时间: 2025-03-10 05:38:17 (1天前)
转自：

<div class =“post-text”itemprop =“text”>
  <P>
    我认为这是因为你处理4D blob，而不是矩阵，大小存储在size数组中（见下面的例子）。
尝试使用此代码段提取平面：
  </p>
   <pre>
    <code>
      //-------------------------------------------------------
// Extract plane with defined n and c from nchw blob
//-------------------------------------------------------
void mtcnn::extractPlane(Mat &src, int n, int ch, Mat &dst)
{
    const int rows = src.size[2];
    const int cols = src.size[3];
    dst = cv::Mat::zeros(rows, cols, CV_32FC1);

for (int row = 0; row < rows; row++)
    {
        const float *ptrsrc = src.ptr<float>(n, ch, row);
        float *ptrdst = dst.ptr<float>(row);
        for (int col = 0; col < cols; col++)
        {
            ptrdst[col] = ptrsrc[col];
        }
    }
}

</code>
  </pre>
  <P>
    希望你使用这样的东西来设置输入数据：
  </p>
   <pre>
    <code>
              inputBlob = blobFromImage(img, 0.0078125, Size(ws, hs), Scalar(127.5, 127.5, 127.5)); //Convert Mat to batch of images
        p_net.setInput(inputBlob, "data"); //set the network input

</code>
  </pre>
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