Hi Zak
Yes, EZ Deconv gives me terrible ringing artefacts around stars.
would you mind expanding on your process of Deconv and Soft Stretch?
I’ve been using PI for just one year, and it has a very steep learning curve.
Would like to use it, and I’ve been avoiding deconv so far.
You mentioned that you use soft stretch to a MASKED image?
So before using it, you use range selection to create a mask to protect the nebula/galaxy? But then how are you actually stretching the image?
many thanks
Sure I don't mind at all! PixInsight is a very steep learning curve for everyone, but once it is mastered, it is a very powerful astrophotography processing software!
I do deconvolution after DBE and colour calibrating my image. When I get to that stage, I open up a these processes (StarMask, Deconvolution). From there, I leave the default settings on the StarMask besides the Truncation (I put that around 25.000), I then apply the StarMask process to the image and it creates a star mask which is going to be used for the deringing.
I extract the luminance channel from my image, then I use EZ Soft Stretch to stretch the image (default settings are fine) and use that as my mask to protect the areas I don't want to be affected. If needed, I use the HistogramTransformation to further adjust the mask to how I like it.
From there, I use a script to create a PSF file called PSFImage to create the PSF image needed in order for Deconvolution to work properly. Depending on the amount of stars in the image, it can take a while or be very fast. Once that's done I click create and it will then create the PSF image.
Finally, in the deconvolution process, I change these settings:
Iterations: 50 (can be changed later if it's too much)
PSF: External PSF (this will be the PSF image I created with PSFImage)
Deringing: 0.0050 Global Dark
Local Support (This will be the star mask image I created; I normally name it LDSI so I know it is my local deringing support image)
Before applying a test deconvolution, I apply the mask I created before onto the image, then I create a preview around an area where I think the changes will be visible (e.g. nebula or galaxy). I then go to that preview separately and apply the deconvolution process. If I like it, I will apply it to the whole image. I f I don't, then I will adjust the iterations to be less, and I will continue to do that up to the point where I am happy with how it looks.
Hope this explains your question about deconvolution! If not, please let me know so I can elaborate more.
Also, apologies for the delay in responding this morning, had to get ready for my day but I did like your reply when I got up XD.
I have attached an example of my deconvolution settings for reference too.
Zak