c++ - OpenCV帮助-错误: no match for ‘operator[]’ (operand types are ‘cv::Mat’ and ‘int’ )

在OpenCV 2.4.10中，我要将行矩阵转换为矩阵12x12:

//Extraction SIFT
  SiftDescriptorExtractor extractor;
  Mat descriptors_1, descriptors_2;
  extractor.compute( img_1, keypoints_1, descriptors_1);
  extractor.compute( img_2, keypoints_2, descriptors_2);

  Mat matrix(12,12, CV_8UC3, Scalar(0));
  int j = 0;
  for (int x = 0; x<12; x++)
  {
     for (int y = 0; y<12; y++)
     {
      matrix [x][y] = descriptors_2[x][j];
      j++

     }

  }

第67行no match for ‘operator[]’ (operand types are ‘cv::Mat’ and ‘int’)上的错误。
谁能帮我？谢谢。

最佳答案

试试这个也许会有所帮助；

Vec3f intensity = descriptors_2.at<Vec3f>(j, i);
matrix.at<unsigned char>(j,i)[0] = internsity.val[0];
matrix.at<unsigned char>(j,i)[1] = internsity.val[1];
matrix.at<unsigned char>(j,i)[2] = internsity.val[2];

关于c++ - OpenCV帮助-错误: no match for ‘operator[]’ (operand types are ‘cv::Mat’ and ‘int’ )，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40676556/