PixInsight 45 day trial downloaded and installed. I was with you Steve right up to LRGBCombination then
I got this:
For a first run through I'm not too surprised, they say the
Right, I'm off to do some tutorials!
Regards
Graeme
So have yourGraeme1858 wrote: ↑Mon May 31, 2021 2:13 pm
PixInsight 45 day trial downloaded and installed. I was with you Steve right up to LRGBCombination thenPI didn't like theRGB boxes unticked!
I got this:
For a first run through I'm not too surprised, they say thePI learning curve is steep but I love a challenge!
Right, I'm off to do some tutorials!
Regards
Graeme
Jockinireland wrote: ↑Mon May 31, 2021 2:45 pm So have your RGB image open and your L. Untick the RGB boxes in LRGB combine, make sure the L is identified as the Lightness source by clicking on the file icon to the right of the l window. Then click and hold on the little triangle at bottom left of the LRGB combine window and drag and drop it on your RGB image. That should do it.
try the Light Vortex tutorials - i found they were the best when I started. And good luck, Personally I did not find PI as difficult as everyone says.
https://www.lightvortexastronomy.com/tutorials.html
I do like that - the core looks like a stormy thundery sky - dark and brooding. You almost expect to see lightning forks.Graeme1858 wrote: ↑Mon May 31, 2021 4:38 pmJockinireland wrote: ↑Mon May 31, 2021 2:45 pm So have your RGB image open and your L. Untick the RGB boxes in LRGB combine, make sure the L is identified as the Lightness source by clicking on the file icon to the right of the l window. Then click and hold on the little triangle at bottom left of the LRGB combine window and drag and drop it on your RGB image. That should do it.
try the Light Vortex tutorials - i found they were the best when I started. And good luck, Personally I did not find PI as difficult as everyone says.
https://www.lightvortexastronomy.com/tutorials.html
That worked, cheers David. The result needs some settings tweaked but the process makes sense!
I'll go have a look at the tutorials.
Regards
Graeme
Ruud wrote: ↑Tue Jun 01, 2021 10:51 am Fitswork has a colour correction tool, a channel mixer which you can use to amplify or shift colours. Of course the ideal tool to fix the green cast without ruining any existing colour contrast. I can't believe I overlooked it earlier.
Fitswork: colour correction + histogram stretching + flatten background (removes gradients).
Photoshop: a tiny bit more channel mixing to further neutralise the greys. Channel mixer to boost colour. Topaz (Denoise and Adjust) to remove noise and bring out detail.
The colours are subdued. I thought that would be fitting for a galaxy of the standing of M106.
I'm satisfied. This challenge was an edifying experience. Thank you Larry!
For a first effort withGraeme1858 wrote: ↑Mon Jun 07, 2021 1:06 pm Just worked through a series of 12 PixInsight videos from Mitch (for total beginners)
This was my workflow:
Screen Transfer Function
Auto Stretch
Dynamic Crop
Auto Background Extraction (Subtraction)
Background Neutralisation
Colour Calibration
Photometric Colour Calibration - Failed!
Extract Luminance
Luminance Mask
Multiscale Linear Transform
Luminance
Chrominance
Luminance Mask
HDR Multiscale Transform
Local Histogram Equalization
Luminance Mask
Curves Transformation
Saturation
Photometric Colour Calibration didn't work, it sounds like a good idea though. Not sure I could do it again without the video playing but I learnt a huge amount! Went to save the process icons and received an error message "are you sure you really know what you are doing" What a cheek! Probably a fair observation though!
Quite pleased with it for a first go. PI seems to be the way forward!
Regards
Graeme
Hi Ruud,
Jockinireland wrote: ↑Tue Jun 08, 2021 7:50 am Take a look at the EZ processing Suite denoise script
Jockinireland wrote: ↑Tue Jun 08, 2021 7:50 am Not sure why PCC failed - It worked ok for me with this data using 840mm FL and 3.76 pixel. What was the error message? Was it at plate solving stage or after that?
PCC is usually fairly robust for me. To check I pulled the fits from the G-drive, cropped it and ran PCC with the settings shown below and it ran through no problem. For the location I did "search co-ordinates" on M106 then "get data" once it had found it.Graeme1858 wrote: ↑Tue Jun 08, 2021 10:58 amJockinireland wrote: ↑Tue Jun 08, 2021 7:50 am Take a look at the EZ processing Suite denoise script
EZ processing? Sounds like my kind of script!
Jockinireland wrote: ↑Tue Jun 08, 2021 7:50 am Not sure why PCC failed - It worked ok for me with this data using 840mm FL and 3.76 pixel. What was the error message? Was it at plate solving stage or after that?
Can't remember the error message but I did use 840mmFL and 3.76 pixel size from your first post.
It was a fun process. My telescope has been put away whilst the builders are in so a re-process of an old image might be the way forward today.
Regards
Graeme
UkDave wrote: ↑Sat Jun 19, 2021 9:38 pm Hi guys, Thanks larry for your data to play with ,processed in Startools 1.8 Alpha ,looks better on an iphone screen rather than my poor laptop screen ,log attached ,thanks for looking
regards Dave
File loaded [C:\Users\44772\Downloads\Challenge No 18 - Larry 1969 - M106.fits].
Image size is 6648 x 4789
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