[AstroPy] zscale in astropy.visualization

[Thomas Robitaille]

Just to close the loop on this, this is now available in the latest
developer version of Astropy thanks to Simon Conseil:

https://github.com/astropy/astropy/pull/4776

http://docs.astropy.org/en/latest/visualization/normalization.html#intervals-and-normalization

The feature will also be present in the upcoming Astropy 1.2 release.

Cheers,
Tom

On 12 April 2016 at 17:55, ES.Enrique Perez <eperez at iaa.es> wrote:
> There is img_scale.py that implements zscale:
>
> # Written by Min-Su Shin
> # Department of Astronomy, University of Michigan (2009 - )
> # Department of Astrophysical Sciences, Princeton University (2005 - 2009)
> #
> # You can freely use the code.
> #
> # http://www.astrobetter.com/making-rgb-images-from-fits-files-with-pythonmatplotlib/
> #
>
>
>> El 12/4/2016, a las 15:11, Thomas Robitaille <thomas.robitaille at gmail.com> escribió:
>>
>> Hi John,
>>
>> As far as I know there is no implementation of zscale in
>> astropy.visualization, but it would be great to have one! I've opened
>> an issue here:
>>
>> https://github.com/astropy/astropy/issues/4773
>>
>> If anyone is interested in implementing this, just comment on the issue!
>>
>> Cheers,
>> Tom
>>
>>
>> On 11 April 2016 at 19:06, John K. Parejko <parejkoj at uw.edu> wrote:
>>> Is there something akin to the ds9-style zscaling algorithm in astropy.visualization (or elsewhere in astropy)? I don't see anything named as such, but maybe it is called differently?
>>>
>>> This is the algorithm described in this iraf.net email from Frank Valdes:
>>>
>>> http://iraf.net/forum/viewtopic.php?showtopic=134139
>>>
>>> Thanks,
>>> John
>>>
>>> --
>>> *************************
>>> John Parejko
>>> parejkoj at uw.edu
>>> http://staff.washington.edu/parejkoj/
>>> Department of Physics and Astronomy
>>> University of Washington
>>> Seattle, WA
>>> **************************
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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