Opencv float array to Mat

you can input float array data to Mat through this way.

float H[9]={1,2,3,4,5,6,7,8,9};
Mat TT = Mat(3,3,CV_32FC1, &H);

But becareful, if H value is changed, TT value is also changed.

See the example source code.

float H[9];
 for(int i=0; i< 9; ++i)
  H[i] = i;
 
 for(int i=0; i< 9; ++i)
  cout << i << " : " << H[i] << endl;

 Mat TT = Mat(3,3,CV_32FC1, &H);
 cout << TT << endl; 

 for(int i=0; i< 9; ++i)
  H[i] = i*10;

 cout << "TT values are chaned.." << endl;
 cout << TT << endl;

 cout << endl;

 

 

If we modify code like this..

 

Mat TT = Mat(3,3,CV_32FC1, &H);

-> Mat TT = Mat(3,3,CV_32FC1, &H).clone();

TT value is not affected by float array.