NicholasH's profile - activity

I'm getting a strange result where it looks like BackgroundSubtractorKNN algorithm may still be learning when the learning rate parameter is set to zero in the apply function.

Looking at the source code for apply() I see that:

learningRate = learningRate >= 0 && nframes > 1 ? learningRate : 1./std::min( 2*nframes, history );

Kshort=(int)(log(0.7)/log(1-learningRate))+1;

Kmid=(int)(log(0.4)/log(1-learningRate))-Kshort+1;

Klong=(int)(log(0.1)/log(1-learningRate))-Kshort-Kmid+1;

This strikes me odd as the log of 1 being zero, therefore division by zero occurs. Can anyone confirm or correct me?

Does BackgroundSubtractorKNN respect a learning rate of 0 correctly? I'm getting a strange result where it looks like Ba

How can I list (or where can I find) the cmake options that were used to build the default OpenCV binary releases available for download? Or are the default binary releases published just built with the default options defined in the source.

For example I want to know if things like TBB and IPP are used or not used in these builds.

How to get cmake options used in default build? How can I list (or where can I find) the cmake options that were used to