Purple colour in NR on mono

[jimmy101]

Purple colour appearing in NR on mono images. StarTools_1_4_350_beta

[admin]

Hmmmm... sounds like a regression of a bug fixed some versions ago.
Thank you for reporting this.

[jimmy101]

Hmmmm... sounds like a regression of a bug fixed some versions ago.
Thank you for reporting this.

Yep... Still happening on StarTools_1_4_352_beta too. I just desaturated atm in layering module to fix.

[admin]

I just tried reproducing this with the steps that would successfully replicate the previous glitch.
This time, I'm not having much luck. Would you be able to recover the steps you took from the StarTools.log for me?
I'll keep trying in the meantime.
Thank you!

[jimmy101]

Ivo, I particularly see colour when brightness detail is increased. I also got colour artefacts in the middle of some medium sized stars. Going to check that the deconv mask was covering them but still why would colour appear on a mono file?

The source data is .fits files from Kstars/EKOS.

Log as below:

StarTools 1.4.352
Wed Jun 5 08:13:21 2019-----------------------------------------------------------
File loaded [/Storage/Share/Captures/NGC6357 -War & Peace Neb/RASA8 + ASI183mm/Red_120mins.fits].
Image size is 5496 x 3672
---
Type of Data: Linear, was not Bayered, or was Bayered + white balanced
--- Crop
Parameter [X1] set to [40 pixels]
Parameter [Y1] set to [100 pixels]
Parameter [X2] set to [5236 pixels (-260)]
Parameter [Y2] set to [3612 pixels (-60)]
Image size is 5196 x 3512
--- Wipe
Parameter [Mode] set to [Correct Brightness Only]
Parameter [Temporary AutoDev] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [2 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [70 %]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [95.00 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [2.0 pixels]
Mask used (BASE64 PNG encoded)
--- Wavelet De-Noise
Parameter [Filter Type] set to [Distance Weighted Outlier Rejection]
Parameter [Grain Size] set to [4.5 pixels]
--- Wavelet De-Noise
Parameter [Scale 1] set to [90 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [90 %]
Parameter [Scale 4] set to [90 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [5]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [13 %]
Parameter [Grain Size] set to [6.0 pixels]
Parameter [Read Noise Compensation] set to [5.80 %]
Parameter [Smoothness] set to [77 %]
Mask used (BASE64 PNG encoded)

[admin]

Thank you very much for this. I've been able to replicate this now. Now to figure out which step introduces the color...

StarTools does a fair bit of color space conversion, depending on a module's needs. This shouldn't impact a mono image, but is seems it does in this instance.

Let me investigate this and report back to you.

[admin]

Found the problem! (dumb and embarrassing copy & paste bug )
It will be fixed in the next release. Thanks again for reporting this and for your patience!