transformations.py 文件源码

def transformPoint2D(pt, M):
    """
    Transform point in 2D coordinates
    :param pt: point coordinates
    :param M: transformation matrix
    :return: transformed point
    """
    pt2 = numpy.asmatrix(M.reshape((3, 3))) * numpy.matrix([pt[0], pt[1], 1]).T
    return numpy.array([pt2[0] / pt2[2], pt2[1] / pt2[2]])