BaseStretch¶
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class
astropy.visualization.
BaseStretch
[source] [edit on github]¶ Bases:
astropy.visualization.BaseTransform
Base class for the stretch classes, which, when called with an array of values in the range [0:1], return an transformed array of values, also in the range [0:1].
Attributes Summary
inverse
Return a stretch that performs the inverse operation. Methods Summary
__call__
(values[, out, clip])Transform values using this stretch. Attributes Documentation
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inverse
¶ Return a stretch that performs the inverse operation.
Methods Documentation
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__call__
(values, out=None, clip=True)[source] [edit on github]¶ Transform values using this stretch.
Parameters: values :
ndarray
or listThe input values, which should already be normalized to the [0:1] range.
out :
ndarray
, optionalIf specified, the output values will be placed in this array (typically used for in-place calculations).
clip : bool, optional
If
True
(default), values outside the [0:1] range are clipped to the [0:1] range.Returns: new_values :
ndarray
The transformed values.
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