white balancing of opencv_extra module












0
















if I use UMat , it is giving exception




error terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(3.4.2) /home/u-16i/softwares/opencv/opencv/modules/core/src/matrix_wrap.cpp:1731: error: (-215:Assertion failed) k == MAT in function 'getMatRef',



but with Mat type, the code is having no issues. Any reason??



Mat src_mat;
UMat src_umat,resized,res;

float inputMIN= 0.1f;
float inputMAX= 0.1f;
float outputMIN= 0.1f;
float outputMAX= 0.1f;
float pcent_topbybottom =0.01f;
src_mat = imread("/home/u-16i/Pictures/wp/beach_flowers-wallpaper-1440x900.jpg");
if (src_mat.empty())
{
printf("Cannot read image file");
return -1;
}
src_mat.copyTo(src_umat);
resize(src_umat, resized, Size(), 0.29, 0.29, CV_INTER_AREA);
imshow("b4 white balance", resized);

Ptr<xphoto::SimpleWB> wb =xphoto::createSimpleWB();
inputMAX=wb->getInputMax();
cout<<"inputMAX-->t"<<inputMAX<<endl;
inputMIN=wb->getInputMin();
cout<<"inputMIN-->t"<<inputMIN<<endl;
outputMIN=wb->getOutputMin();
cout<<"outputMIN-->t"<<outputMIN<<endl;
outputMAX=wb->getOutputMax();
wb->setP(4.2);
cout<<"outputMAX-->t"<<outputMAX<<endl;
pcent_topbybottom =wb->getP();
cout<<"pcent_topbybottom-->t"<<pcent_topbybottom<<endl;

wb->balanceWhite(resized, res);
imshow("after white balance", res);

waitKey(0);
return 0;









share|improve this question



























    0
















    if I use UMat , it is giving exception




    error terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(3.4.2) /home/u-16i/softwares/opencv/opencv/modules/core/src/matrix_wrap.cpp:1731: error: (-215:Assertion failed) k == MAT in function 'getMatRef',



    but with Mat type, the code is having no issues. Any reason??



    Mat src_mat;
    UMat src_umat,resized,res;

    float inputMIN= 0.1f;
    float inputMAX= 0.1f;
    float outputMIN= 0.1f;
    float outputMAX= 0.1f;
    float pcent_topbybottom =0.01f;
    src_mat = imread("/home/u-16i/Pictures/wp/beach_flowers-wallpaper-1440x900.jpg");
    if (src_mat.empty())
    {
    printf("Cannot read image file");
    return -1;
    }
    src_mat.copyTo(src_umat);
    resize(src_umat, resized, Size(), 0.29, 0.29, CV_INTER_AREA);
    imshow("b4 white balance", resized);

    Ptr<xphoto::SimpleWB> wb =xphoto::createSimpleWB();
    inputMAX=wb->getInputMax();
    cout<<"inputMAX-->t"<<inputMAX<<endl;
    inputMIN=wb->getInputMin();
    cout<<"inputMIN-->t"<<inputMIN<<endl;
    outputMIN=wb->getOutputMin();
    cout<<"outputMIN-->t"<<outputMIN<<endl;
    outputMAX=wb->getOutputMax();
    wb->setP(4.2);
    cout<<"outputMAX-->t"<<outputMAX<<endl;
    pcent_topbybottom =wb->getP();
    cout<<"pcent_topbybottom-->t"<<pcent_topbybottom<<endl;

    wb->balanceWhite(resized, res);
    imshow("after white balance", res);

    waitKey(0);
    return 0;









    share|improve this question

























      0












      0








      0









      if I use UMat , it is giving exception




      error terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(3.4.2) /home/u-16i/softwares/opencv/opencv/modules/core/src/matrix_wrap.cpp:1731: error: (-215:Assertion failed) k == MAT in function 'getMatRef',



      but with Mat type, the code is having no issues. Any reason??



      Mat src_mat;
      UMat src_umat,resized,res;

      float inputMIN= 0.1f;
      float inputMAX= 0.1f;
      float outputMIN= 0.1f;
      float outputMAX= 0.1f;
      float pcent_topbybottom =0.01f;
      src_mat = imread("/home/u-16i/Pictures/wp/beach_flowers-wallpaper-1440x900.jpg");
      if (src_mat.empty())
      {
      printf("Cannot read image file");
      return -1;
      }
      src_mat.copyTo(src_umat);
      resize(src_umat, resized, Size(), 0.29, 0.29, CV_INTER_AREA);
      imshow("b4 white balance", resized);

      Ptr<xphoto::SimpleWB> wb =xphoto::createSimpleWB();
      inputMAX=wb->getInputMax();
      cout<<"inputMAX-->t"<<inputMAX<<endl;
      inputMIN=wb->getInputMin();
      cout<<"inputMIN-->t"<<inputMIN<<endl;
      outputMIN=wb->getOutputMin();
      cout<<"outputMIN-->t"<<outputMIN<<endl;
      outputMAX=wb->getOutputMax();
      wb->setP(4.2);
      cout<<"outputMAX-->t"<<outputMAX<<endl;
      pcent_topbybottom =wb->getP();
      cout<<"pcent_topbybottom-->t"<<pcent_topbybottom<<endl;

      wb->balanceWhite(resized, res);
      imshow("after white balance", res);

      waitKey(0);
      return 0;









      share|improve this question















      if I use UMat , it is giving exception




      error terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(3.4.2) /home/u-16i/softwares/opencv/opencv/modules/core/src/matrix_wrap.cpp:1731: error: (-215:Assertion failed) k == MAT in function 'getMatRef',



      but with Mat type, the code is having no issues. Any reason??



      Mat src_mat;
      UMat src_umat,resized,res;

      float inputMIN= 0.1f;
      float inputMAX= 0.1f;
      float outputMIN= 0.1f;
      float outputMAX= 0.1f;
      float pcent_topbybottom =0.01f;
      src_mat = imread("/home/u-16i/Pictures/wp/beach_flowers-wallpaper-1440x900.jpg");
      if (src_mat.empty())
      {
      printf("Cannot read image file");
      return -1;
      }
      src_mat.copyTo(src_umat);
      resize(src_umat, resized, Size(), 0.29, 0.29, CV_INTER_AREA);
      imshow("b4 white balance", resized);

      Ptr<xphoto::SimpleWB> wb =xphoto::createSimpleWB();
      inputMAX=wb->getInputMax();
      cout<<"inputMAX-->t"<<inputMAX<<endl;
      inputMIN=wb->getInputMin();
      cout<<"inputMIN-->t"<<inputMIN<<endl;
      outputMIN=wb->getOutputMin();
      cout<<"outputMIN-->t"<<outputMIN<<endl;
      outputMAX=wb->getOutputMax();
      wb->setP(4.2);
      cout<<"outputMAX-->t"<<outputMAX<<endl;
      pcent_topbybottom =wb->getP();
      cout<<"pcent_topbybottom-->t"<<pcent_topbybottom<<endl;

      wb->balanceWhite(resized, res);
      imshow("after white balance", res);

      waitKey(0);
      return 0;






      opencv3.0 mat






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      asked Jan 1 at 4:54









      indr0indr0

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