Scale

menpo.transform.homogeneous.scale.Scale(scale_factor, n_dims=None)

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: double or (D,) ndarray :

Scale for each axis.

n_dims: int :

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