Scale

menpo.transform.Scale(scale_factor, n_dims=None)[source]

Factory function for producing Scale transforms. Zero scale factors are not permitted.

A UniformScale will be produced if:

  • A float scale_factor and a n_dims kwarg are provided

  • A ndarray scale_factor with shape (n_dims,) is provided with all elements being the same

A NonUniformScale will be provided if:

  • A ndarray scale_factor with shape (n_dims,) is provided with at least two differing scale factors.

Parameters

  • scale_factor (float or (n_dims,) ndarray) – Scale for each axis.

  • n_dims (int, optional) – The dimensionality of the output transform.

Returns

scale (UniformScale or NonUniformScale) – The correct type of scale

Raises

ValueError – If any of the scale factors is zero