How to sow randn opencv function

Question

I want to run the rand function, but I cannot do it.

srand(time(NULL));
Mat mymat = Mat::zeroes(1024,1024,CV_32F);
randn(mymat,0,1); 

Should not that give me a random mat with a name mymat, mean = 0which mean = 0, as well variance = 1? However, it gives the same one mymatat every start.

Here is a link for randn that claims srand works.

I tried to give different numbers instead of time (NULL), but everyone has the same output random numbers. I checked the same with another machine, it produces the same result with the first machine. So sowing does not work.

Thanks,

Answer 1

OpenCV, :

cv::theRNG().state = seed;

- OpenCV , () .