PixInsight Forum (historical)

PixInsight => General => Topic started by: ahughes on 2018 August 01 06:25:27

Title: Deconvolution
Post by: ahughes on 2018 August 01 06:25:27

Hi, I'm a newbie trying to make my way through PixInsight. Images produced on a DSLR.
In the deconvolution process I extract the luminosity and work on this, however when I have completed the task how to I recombine the Luminosity with the RGB, if this is what you are supposed to do?
Also when I use PSF all my stars are gaussion and my understanding is that they should be moffat, is this a problem with the quality of my photographs.
I assume I am doing something wrong.
Any help would be appreciated.
Thanks
Alan

Title: Re: Deconvolution
Post by: RickS on 2018 August 02 17:31:49

You can use ChannelExtraction in one of the CIE modes, let's assume CIE L*a*b*, to extract lightness (L*).  After running decon on the L* you can use ChannelCombination to "push" it back into the image: select the modified L* image and untick the a* and b* boxes then drag the new instance icon (little triangle) and drop it on the original colour image.

If the auto mode is deciding that Gaussian is a better fit for your stars then that's OK.

Cheers,
Rick.

Title: Re: Deconvolution
Post by: ahughes on 2018 August 04 07:18:36

Thanks Rick I found that easy to follow.
However I have one follow up question, re PSF can you use the process with a mixture of Gaussian and Moffat or must it be one or the other.
Regards
Alan