Question

I am using the C++ OpenCV interface but need to use a function that hasn’t been reimplemented for the interface so uses the old convention (function is cvFindExtrinsicCameraParams2 if it matters)

So I need to convert a vector<Point3f> to a CvMat* …how do I do this?

Answer 1

I’m not sure what the result should be, but if I read the documentation right, you can convert your type in a few steps:

First, create the new counterpart Mat to CvMat*:

std::vector<Point3f> myVec = ...;
//template<typename _Tp> explicit Mat(const vector<_Tp>& vec, bool copyData=false);
Mat m = Mat(myVec);

Then use Mat‘s cast operator:

//operator CvMat() const;
CvMat cvm = static_cast<CvMat>(m);

and finally call your function

cvFindExtrinsicCameraParams2(...,&cvm,...);

However, I’ve no experience with OpenMv, so I’m just citing the documentation. This may not reflect what you wanted it to do, in which case you may have to clarify your question.