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参考网址：访问像素并检查是否为inf像素-腾讯云开发者社区-腾讯云 (tencent.com)

using namespace cv;
cv::Mat replaceInvalidDisparities(const cv::Mat &original_disp)
{
  cv::Mat output = orignal_disp.clone();

  //access pixel

  for(int i = 0; i< output.rows; i++)
  {
    for(int j=0; j<output.cols; j++)
   {
      //now here i want to check if the actual pixel is inf
      cvIsInf(output.at<double>(i,j));
   }
  }
}