TVGDenoise on Ha images

[sreilly]

Reading over what I can find on TVGD and it addresses RGB images and LRGB both linear and non-linear but what mode should a Ha or even luminance image use? What I'm working on is a 28 hour Ha image that has been calibrated, aligned, combined, cropped, had DBE applied, and stretched using Masked Stretch. Now that I have this non-linear master image I need to remove some noise, mostly background. Suggestions very welcomed.

Steve

[lucchett]

Steve, if it is only ha or Lum, I would choose CIELAB mode, working in non linear state, and unflag the chrominance tic.

Best,
Andrea

[sreilly]

Thanks Andrea,

I fooled around with it a bit and found that worked fairly well. What I did discover, and have seen of late, is that the darker areas of the images have been getting a blotchy molted look. If I run the images through another program I'm not getting this. TVGD seems to accentuate these. I typically use Masked Stretch instead of Hist to keep star sizes smaller. I'll have to see if this is the cause.

Steve

[avarakin]

I would suggest to start with muredenoise script. It requires some tweaking of parameters and works only on images right after stacking, but results are amazing.

Alex

[lucchett]

I found the TGV D perfect for CCD images.
It just requires the proper setting of the edge protection parameter and the use of a proper lightness mask.
check your stars to see that you don't overdue.


I prefer to defer the denoise to late stages of the processing, so mure denoise is not an option to me but I know it is  also very good.


Ciao,
Andrea

[jerryyyyy]

I would suggest to start with muredenoise script. It requires some tweaking of parameters and works only on images right after stacking, but results are amazing.

Alex

Am a big believer too, but can you say a bit how you tweak the settings?

PS  May want to see my post above on using this with drizzled files... having a hard time.