StarTools

hi ivo im just experimenting with some data ,currently processing 3 nights data of M31 ,so i have data from one night just playing around to see whats in the image ,now i know you only use auto dev not manual dev ,so i have cropped image ,used auto dev ,wipe manual dark anomaly 6 pixels , manual dev, then screen shot image ,in the image you see the white areas i dont know what you describe it as, gradients ? how do i get rid of this before preceeding i sometimes see this when using auto dev wipe autodev ,so just trying to understand what it is and the best way to eradicate this ,it may be i started imaging whilst M31 was still to low down and maybe waited until it had risen higher or maybe i should restack omitting a few early subs.note bias frames loaded as darks and flats used ,dithered images

regards Dave

HI Dave,

I'd love to see your stacked tif or fit if that's possible.

Richard

Hi Dave,

This looks like a classic halo around a dust speck that wasn't masked out (or better yet - caught by your flats). This "halo" with a hole in the middle is caused by Wipe backing off locally so it doesn't clip the darker-than-the-rest-of-the-background-feature. You can see a very similar signature here;
https://www.startools.org/modules/wipe/ ... aring-data


Try masking out the black spot before running Wipe and see if the issue persists. Cheers!

Thanks ivo ,i have now processed three 3 nights data here comments welcome ,i changed dither setting to random in phd2 but i prefer spiral so next time i will change back ,there is about 5.50 hrs data stacked in regim i will try DSS now it has been updated to see if there is a difference in end stack , https://www.dropbox.com/s/nc3do1rcprflt ... s.tif?dl=0 and seemed to process better note i have cropped borders ,richard that file is here from the single night https://www.dropbox.com/s/3ynzrybez6azu ... s.tif?dl=0
https://flic.kr/p/2h676iC

upgraded to 1.5 tried on my M31 x3 combined data ,really struggling there is a red cast and getting lost trying to rid the red cast ,could someone have a look and be able to tell me what the issue is https://www.dropbox.com/s/nc3do1rcprflt ... s.tif?dl=0 so i tried auto dev ,wipe , autodev im lost how to get past this point what am i doing wrong compared to 1.4 there does seem better detail but i didn't have the red cast showing .

regards dave

Burly wrote:upgraded to 1.5 tried on my M31 x3 combined data ,really struggling there is a red cast and getting lost trying to rid the red cast ,could someone have a look and be able to tell me what the issue is https://www.dropbox.com/s/nc3do1rcprflt ... s.tif?dl=0 so i tried auto dev ,wipe , autodev im lost how to get past this point what am i doing wrong compared to 1.4 there does seem better detail but i didn't have the red cast showing .

regards dave

Hi Dave,

I'm a little unsure of what the problem might be you are experiencing; the dataset comes up nicely with a very standard workflow? File loaded [/home/ivojager/Downloads/M31x3CombinedFiles.tif].
--- Auto Develop
To see what we got.
We can see oversampling, heavy light pollution or bias.
--- Bin
To reduce oversampling.
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
Image size is 1905 x 1196
--- Wipe
Default parameters.
Severe stacking artifacts become visible.
--- Auto Develop
Default parameters.
--- Crop
Cropping away stacking artifacts.
Parameter [X1] set to [320 pixels]
Parameter [Y1] set to [238 pixels]
Parameter [X2] set to [1528 pixels (-342)]
Parameter [Y2] set to [952 pixels (-211)]
Image size is 1208 x 714
--- Restore
Original
--- Wipe
Default parameters.
Parameter [Dark Anomaly Filter] set to [4 pixels]
--- Auto Develop
Final global stretch
Parameter [Ignore Fine Detail <] set to [2.7 pixels]
Parameter [Outside RoI Influence] set to [50 %]
Parameter [RoI X1] set to [441 pixels]
Parameter [RoI Y1] set to [266 pixels]
Parameter [RoI X2] set to [753 pixels (-455)]
Parameter [RoI Y2] set to [507 pixels (-207)]
--- Deconvolution
Auto mask.
Parameter [Image Type] set to [Deep Space]
Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
Parameter [Radius] set to [1.5 pixels]
Parameter [Iterations] set to [6]
Parameter [Regularization] set to [1.00 (optimal noise and detail)]
Parameter [Mask Fuzz] set to [4.0 pixels]
--- HDR
To taste. M31's core is a perfect candidate for the Reveal preset.
--- Color
Parameter [Dark Saturation] set to [Full]
--- Wavelet De-Noise
Default.

Thank you ivo for taking the time I will have another play later I didn’t use crop as I had already cropped, obviously I had not cropped enough, I also see you used restore maybe this is the important part I have always failed to do , I take it this was causing me to have the red bias I couldn’t get rid of , I live in a town with led street lighting so lps a problem hence using a Idas D2 filter, I will post my result once processed.
Regards Dave

Burly wrote:Thank you ivo for taking the time I will have another play later I didn’t use crop as I had already cropped, obviously I had not cropped enough, I also see you used restore maybe this is the important part I have always failed to do , I take it this was causing me to have the red bias I couldn’t get rid of , I live in a town with led street lighting so lps a problem hence using a Idas D2 filter, I will post my result once processed.
Regards Dave

Let me know how you go Dave. Strabge thing is though, I never saw a red bias of any kind while processing your data...

Seems a better result this time ivo i think a lot of the problem has been caused by the first stack ,but never mind all a learning curve StarTools 1.5.364
Fri Aug 30 20:35:16 2019
-----------------------------------------------------------
File loaded [C:\APT_Images\Camera_1\2019-08-23\M31x3CombinedFiles.tif].
Image size is 3811 x 2392
---
Type of Data: Linear and was Bayered, but not whitebalanced
--- Bin
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
Image size is 1905 x 1196
--- Crop
Parameter [X1] set to [320 pixels]
Parameter [Y1] set to [238 pixels]
Parameter [X2] set to [1528 pixels (-377)]
Parameter [Y2] set to [952 pixels (-244)]
Image size is 1208 x 714
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [4 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [5.0 pixels]
Parameter [Outside RoI Influence] set to [50 %]
Parameter [RoI X1] set to [0 pixels]
Parameter [RoI Y1] set to [0 pixels]
Parameter [RoI X2] set to [1208 pixels (-0)]
Parameter [RoI Y2] set to [714 pixels (-0)]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [4 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [2.7 pixels]
Parameter [Outside RoI Influence] set to [50 %]
Parameter [RoI X1] set to [441 pixels]
Parameter [RoI Y1] set to [226 pixels]
Parameter [RoI X2] set to [753 pixels (-455)]
Parameter [RoI Y2] set to [507 pixels (-207)]
Mask used (BASE64 PNG encoded)


--- Deconvolution
Parameter [Image Type] set to [Deep Space]
Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
Parameter [Radius] set to [1.5 pixels]
Parameter [Iterations] set to [6]
Parameter [Regularization] set to [1.00 (optimal noise and detail)]
Parameter [Mask Fuzz] set to [4.0 pixels]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Reveal DSO Core]
Parameter [Dark/Bright Response] set to [Full]
Parameter [Detail Size Range] set to [1000 pixels]
Parameter [Strength] set to [1.2]
--- Color
Parameter [Cap Green] set to [Sliders Reduce Color Bias]
Parameter [Bias Slider Mode] set to [Scientific (Color Constancy)]
Parameter [Style] set to [Straight CIELab Luminance Retention]
Parameter [LRGB Method Emulation] set to [UNKNOWN]
Parameter [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [200 %]
Parameter [Blue Bias Reduce] set to [1.37]
Parameter [Green Bias Reduce] set to [2.66]
Parameter [Red Bias Reduce] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [UNKNOWN] set to [0 %]
--- Wavelet Sharpen
Parameter [Structure Size] set to [Large]
--- Wavelet Sharpen
Parameter [Intelligent Enhance] set to [No]
Parameter [Scale 1] set to [100 %]
Parameter [Scale 2] set to [100 %]
Parameter [Scale 3] set to [100 %]
Parameter [Scale 4] set to [100 %]
Parameter [Scale 5] set to [100 %]
Parameter [Mask Fuzz] set to [8.0 pixels]
Parameter [Amount] set to [100 %]
Parameter [Small Detail Bias] set to [75 %]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Reveal All]
Parameter [Dark/Bright Response] set to [1.00]
Parameter [Detail Size Range] set to [1000 pixels]
Parameter [Strength] set to [1.2]
--- Color
Parameter [Cap Green] set to [Sliders Reduce Color Bias]
Parameter [Bias Slider Mode] set to [Scientific (Color Constancy)]
Parameter [Style] set to [Straight CIELab Luminance Retention]
Parameter [LRGB Method Emulation] set to [UNKNOWN]
Parameter [Dark Saturation] set to [8.50]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [144 %]
Parameter [Blue Bias Reduce] set to [1.37]
Parameter [Green Bias Reduce] set to [2.66]
Parameter [Red Bias Reduce] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [UNKNOWN] set to [25 %]
--- Wavelet De-Noise
Parameter [Filter Type] set to [Distance Weighted Outlier Rejection]
Parameter [Grain Size] set to [2.7 pixels]
--- Wavelet De-Noise
Parameter [Scale 1] set to [95 %]
Parameter [Scale 2] set to [95 %]
Parameter [Scale 3] set to [95 %]
Parameter [Scale 4] set to [95 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [6]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [12 %]
Parameter [Grain Dispersion] set to [2.7 pixels]
Parameter [Non-linear Response <] set to [Off]
Parameter [Smoothness] set to [65 %]
---

--- Fractal Flux
Parameter [Brightness Mask Mode] set to [Off]
Parameter [Algorithm] set to [Add Detail]
Parameter [Negative Flux] set to [0 %]
Parameter [Positive Flux] set to [25 %]
Parameter [Detail Filter] set to [2.5 pixels]
Parameter [Filter Fuzz] set to [1.0 pixels]
Parameter [Filter Radius] set to [1.5 pixels]
Parameter [Filter Amount] set to [200 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Brightness Mask Power] set to [1.00]
Type of Data: Linear and was Bayered, but not whitebalanced
File saved [C:\APT_Images\Camera_1\2019-08-23\M31x3daves process .jpg].

Excellent! The purplish HII areas are unmistakeably starting to show up too.