PowerStretch¶
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class
astropy.visualization.
PowerStretch
(a)[source] [edit on github]¶ Bases:
astropy.visualization.BaseStretch
A power stretch.
The stretch is given by:
Parameters: a : float
The power index (see the above formula).
Attributes Summary
inverse
A stretch object that performs the inverse operation. Methods Summary
__call__
(values[, clip, out])Transform values using this stretch. Attributes Documentation
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inverse
¶ A stretch object that performs the inverse operation.
Methods Documentation
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__call__
(values, clip=True, out=None)[source] [edit on github]¶ Transform values using this stretch.
Parameters: values : array-like
The input values, which should already be normalized to the [0:1] range.
clip : bool, optional
If
True
(default), values outside the [0:1] range are clipped to the [0:1] range.out :
ndarray
, optionalIf specified, the output values will be placed in this array (typically used for in-place calculations).
Returns: result :
ndarray
The transformed values.
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