Author Topic: lost in a DSLR LsynRGB workflow, masked stretch and repaired HSV  (Read 2350 times)

Offline ChoJin

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Hello,

I'm currently trying to do some DSLR processing using a synthetic L created from ImageIntegration.

But I'm a little bit lost about what to do after deconvolution and linear noise reduction on the Lsyn data.

When should I combine my RGB data back with my Lsyn data?

Initially I thought I was going to do some non linear processing (to bring out faint stuff and HDR/local contrast) with my Lsyn data before the ChannelCombination but then I realized that if I were to do that, I would not be able to do a RepairedHSV before a MaskedStretch.
Or should I do a a ChannelCombination with my linear Lsyn (after deconv+noise reduction for instance), then apply my RepairedHSV/MaskedStretch to bootstrap my non linear processing on the RGB data, while continuing to work on my Lsyn non linear processing in parallel? (and later on do another ChannelCombination once I have a full RGB and Lsyn non linear processing done)?

In other words, I'm quite confused about how long I should keep my Lsyn processing separated and when I should really combine them back. Please help? :-)

PS: Initially I went to the Lsyn road because it seemed a nice idea to minimize the noise and also because I wanted to bring out some faint details and it seemed to make more sense to do so with L. Correct me if I'm on a wrong path.


Offline msmythers

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Re: lost in a DSLR LsynRGB workflow, masked stretch and repaired HSV
« Reply #1 on: 2016 September 25 05:56:00 »
For me to make a synthetic L from a DSLR makes no since in PixInsight. We don't have 4 collected channels like a mono CCD, only 3. Processes like Deconvolution, MultiscaleLinearTransform and so on already work with Luminance only(CIE Y) while linear. Even while non-linear we can within many tools select the lightness product only as with TGVDenoise Or Curves with the CIE L* curve. With other software that don't have the flexibility or strength of PixInsight you would might need to, I don't know.

Just my thoughts.


Mike   

Offline ChoJin

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Re: lost in a DSLR LsynRGB workflow, masked stretch and repaired HSV
« Reply #2 on: 2016 September 25 06:17:06 »
yes, but reading this forum I learnt that, with the imageintegration process, you can make a better SNR-optimized synthetic L channel