def InverseHough(rhotheta, halfsemiaxes=(1.2, 0.6), centerofproj=(0.0, 0.0)):
    """ from rho and theta in hough space
    gives extreme points of a straight line where must lie all spots
    belonging to the same zone axis
    In a rigourous manner, we must find the intersection of the straight line with an ellipse.
    Here, we consider simply a rectangle!
    """
    pass
