DL¶
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class
menpofit.differentiable.
DL
[source]¶ Bases:
object
Object that is able to take its own derivative with respect to landmark changes.
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abstract
d_dl
(points)[source]¶ The derivative of this spatial object with respect to spatial changes in anchor landmark points or centres, evaluated at points.
- Parameters
points (
(n_points, n_dims)
ndarray) – The spatial points at which the derivative should be evaluated.- Returns
d_dl (
(n_points, n_centres, n_dims)
ndarray) – The Jacobian wrt landmark changes.d_dl[i, k, m]
is the scalar differential change that the any dimension of thei
’th point experiences due to a first order change in them
’th dimension of thek
’th landmark point.Note that at present this assumes that the change in every dimension is equal.
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abstract