OpenCV random forest: Setting a random seed

Question

Since there is randomness involved in the computation of a random forest classifier, it is necessary to define a random seed to get reproducible results. How does one do this for OpenCV CvRTrees? I do not see such a parameter in CvRTParams.

Update: The API change of OpenCV 3 removed CvRTParams. However, the title question remains.

Answer 1

it depends on the opencv version you are using.

• While 2.4.9 seems to use the global cv::theRNG() , where you can just set theRNG().state = something,

• This no longer seems to be possible in opencv3.0