m35

[torsinadoc]

Process with PI (stack and crop and initial stretch) and Startools. No earthly idea how to process star clusters. Had a heck of a time not over processing and still getting color. Thoughts? Suggestions?

[admin]

Process with PI (stack and crop and initial stretch) and Startools. No earthly idea how to process star clusters. Had a heck of a time not over processing and still getting color. Thoughts? Suggestions?

Hi,

Any chance you could post your workflow (both PI and ST)?
Clusters should be pretty easy in StarTools (especially 1.3.5). Unfortunately PI (and other software) has a tendency to destroy colors in highlights (read more about that problem here, how 1.3.5 solves this, and to see an example of a star cluster rendered with 1.3.5's new color constancy model).

In StarTools, less is more, so you'd typically look at a very simplework flow for a cluster;
* Develop or AutoDev to inspect data.
* Remove artifacts.
* Remove gradients (Wipe).
* FInal stretch with Develop or AutoDev.
* Some HDR and/or Contrast optimisation (if you wish).
* Launch Color module.
* Switch Tracking Off / Noise Reduction.

[torsinadoc]

oh I wish I could remember. I can't find it in PI and I was jumping all over the place


I tried a simpler approach with double cluster (didn't try and heal stars just working on color). Being color blind makes that part pretty daunting.

--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Crop
Parameter [X1] set to [84 pixels]
Parameter [Y1] set to [75 pixels]
Parameter [X2] set to [5069 pixels (-133)]
Parameter [Y2] set to [3329 pixels (-136)]
--- Bin
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [2.4 pixels]
Parameter [Outside ROI Influence] set to [15 %]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
Undo.
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [0 %]
Parameter [Corner Aggressiveness] set to [165 %]
Parameter [Aggressiveness] set to [75 %]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [1.4 pixels]
Parameter [Outside ROI Influence] set to [15 %]
File loaded [/Users/alandiamond/Documents/Astronomy/Stacked need processing/DC.sig5.5.fit].
---
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Crop
Parameter [X1] set to [84 pixels]
Parameter [Y1] set to [75 pixels]
Parameter [X2] set to [5069 pixels (-133)]
Parameter [Y2] set to [3329 pixels (-136)]
--- Bin
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [2.8 pixels]
Parameter [Outside ROI Influence] set to [15 %]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [0.89]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [97.74 %]
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 [Off]
--- Contrast
Parameter [Expose Dark Areas] set to [No]
Parameter [Compensate Gamma] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Aggressiveness] set to [75 %]
Parameter [Dark Anomaly Headroom] set to [15 %]
--- Color
Parameter [Cap Green] set to [To Brown]
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [RGB Ratio, CIELab Luminance Retention]
Parameter [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [175 %]
Parameter [Blue Bias Reduce] set to [2.25]
Parameter [Green Bias Reduce] set to [2.37]
Parameter [Red Bias Reduce] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]
--- Wavelet De-Noise
Parameter [Scale 1] set to [96 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [84 %]
Parameter [Scale 4] set to [73 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [3]
Parameter [Color Detail Loss] set to [5 %]
Parameter [Brightness Detail Loss] set to [14 %]
Parameter [Redistribution Kernel] set to [4.5 pixels]
Parameter [Read Noise Compensation] set to [Off]
Parameter [Smoothness] set to [50 %]
--- Color
Parameter [Cap Green] set to [To Brown]
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
Parameter [Dark Saturation] set to [1.00]
Parameter [Bright Saturation] set to [9.90]
Parameter [Saturation Amount] set to [394 %]
Parameter [Blue Bias Reduce] set to [1.07]
Parameter [Green Bias Reduce] set to [1.06]
Parameter [Red Bias Reduce] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]

[admin]

(Please bear with me - I'm battling a wrist injury at the moment, so replies may take a bit longer than usual)

Thanks for that! It's odd - I'd think there'd be more color we could bring out. Any chance you could share some data with me. I'll have a look as soon as my wrists allow me.

Being color blind makes that part pretty daunting.

You might find the (MaxRGB view) useful in that case. It shows which channel is dominant for each pixel. It can help getting the color balance right without directly having to rely on actual color rendering.
E.g. if green pixels are dominant, ease off on the green. If red pixels are not dominant enough, add some red, etc.

[torsinadoc]

Sure what data? I use a cls filter
Which causes me some issues I think

[admin]

Sure what data? I use a cls filter
Which causes me some issues I think

The M35 data would be great if you have a stacked FITS or TIFF file for me.

[torsinadoc]

https://drive.google.com/file/d/0B1w8Ns ... sp=sharing

[torsinadoc]

https://docs.google.com/file/d/0B1w8Nsl ... cslist_api

[admin]

Hi,

I had a look at the data.
Your background appears to have some problems in that it contains anomalous data, blobs/areas... (incorrect flat frames or lack of bias/dark frames?)
Nevertheless, color recovery was pretty easy in 1.3.5. Just use the Color module as one of the last steps and you should be good!

Also have a look at the Lens module to ameliorate the field curvature in the data before you start processing.

This is what I came up with in 1.3.5. It's not great, but it shows (largely) correct color temperatures for the stars.

m35sig3.jpg (660.43 KiB) Viewed 9987 times

The log is as follows;

--- Bin
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
--- Auto Develop
Default.
--- Wipe
Parameter [Dark Anomaly Filter] set to [5 pixels]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [2.2 pixels]
--- Contrast
Parameter [Dark Anomaly Filter] set to [12 pixels]
--- Color
Parameter [Cap Green] set to [To Yellow]
Parameter [Green Bias Reduce] set to [1.15]
Parameter [Red Bias Reduce] set to [2.01]
--- Deconvolution
Parameter [Radius] set to [1.4 pixels]
--- Wavelet De-Noise
(switch Tracking off)
Parameter [Color Detail Loss] set to [18 %]
Parameter [Read Noise Compensation] set to [6.58 %]
--- Life
Isolate Preset.

[torsinadoc]

my attempt at dithering and did not use darks. Maybe I didn't do it correctly

I used flats and bias