tick.prox.ProxTV¶

class tick.prox.ProxTV(strength: float, range: tuple = None, positive: bool = False)[source]¶

Proximal operator of the total-variation penalization

Parameters:

strength : float

Level of total-variation penalization

range : tuple of two int, default=`None`

Range on which the prox is applied. If None then the prox is applied on the whole vector

positive : bool, default=`False`

If True, apply L1 penalization together with a projection onto the set of vectors with non-negative entries

Attributes:

dtype : {'float64', 'float32'}

Type of the arrays used.

Notes

Uses the fast-TV algorithm described in:

• “A Direct Algorithm for 1D Total Variation Denoising” by Laurent Condat, Ieee Signal Proc. Letters

Examples using tick.prox.ProxTV¶