Hi all,
I wonder to know that is there a way to set a GpuMatrix elements to specified value?Just like CV_MAT_ELEM in cpu.I read the documentation,but cannot solve it.Can someone help me with it,Your help is much appreciated!
Best regards,
You can't access GpuMat element in cpu code. You should create Mat object first, fill it and upload it to gpu memory:
Mat host_mat(rows, cols, type);
// fill host_mat
GpuMat dev_mat;
dev_mat.upload(host_mat);
If you want to fill GpuMat with some value (ex. zero) you can use setTo method:
GpuMat dev_mat(rows, cols, type);
dev_mat.setTo(Scalar::all(0));
The code like this: for(...) { CV_MAT_ELEM(A0,float,0,0) = u1ProjectMatrixPara1[8] - ProjectMatrixPara1[0]; ....... CV_MAT_ELEM(B0,float,0,0) = ProjectMatrixPara1[3] - u1ProjectMatrixPara1[11]; ....... cvSolve(A0,B0,X0,CV_SVD); ResultPt3D.x = CV_MAT_ELEM( *X0, float, 0, 0 ) ; ..... Pts3D.push_back(ResultPt3D); }
I want put it into gpu,is there any way to solve it?
What if I have to access elements of GpuMat frequently? Upload Mat to GpuMat is too slow... I would appreciate if you could have a look at this question.
Asked: 2013-01-15 01:56:35 -0600
Seen: 3,870 times
Last updated: Jan 15 '13
