Object that is able to take its own derivative with respect to the parametrisation.
The parametrisation of objects is typically defined by the menpo.base.Vectorizable interface. As a result,
DPis a mix-in that should be inherited along with menpo.base.Vectorizable.
The derivative of this spatial object with respect to the parametrisation changes evaluated at points.
(n_points, n_dims)ndarray) – The spatial points at which the derivative should be evaluated.
(n_points, n_parameters, n_dims)ndarray) – The Jacobian with respect to the parametrisation.
d_dp[i, j, k]is the scalar differential change that the
k’th dimension of the
i’th point experiences due to a first order change in the
j’th scalar in the parametrisation vector.