Pnp checkerboard covariance

i want to ask if there is a way to find the covariance of the retrieved position of the checkerboard in Opencv, when using the findchessboard function.

What do you mean by covariance?
findchessboard needs one image and retrieves corners

By covariance i meant a covariance matrix related to the probability of the position retrieved.
Even tough the image read is one, there sould be some uncertainty due to the spatial resolution of the camera.