ContrastBiasStretch¶
- class astropy.visualization.ContrastBiasStretch(contrast, bias)[source]¶
Bases:
BaseStretchA stretch that takes into account contrast and bias.
The stretch is given by:
\[y = (x - {\rm bias}) * {\rm contrast} + 0.5\]and the output values are clipped to the [0:1] range.
- Parameters:
- contrast
python:float The contrast parameter (see the above formula).
- bias
python:float The bias parameter (see the above formula).
- contrast
Attributes Summary
A stretch object that performs the inverse operation.
Methods Summary
__call__(values[, clip, out])Transform values using this stretch.
Attributes Documentation
- inverse¶
A stretch object that performs the inverse operation.
Methods Documentation
- __call__(values, clip=True, out=None)[source]¶
Transform values using this stretch.
- Parameters:
- valuesnumpy:array_like
The input values, which should already be normalized to the [0:1] range.
- clipbool, optional
If
True(default), values outside the [0:1] range are clipped to the [0:1] range.- out
ndarray, optional If specified, the output values will be placed in this array (typically used for in-place calculations).
- Returns:
- result
ndarray The transformed values.
- result