NGC 6357 in HA

[DavidNg]

Hi again,

Here are 2 versions of processing NGC 6357, which I captured last night. The image composes of 45x10min in HA. Both were processed in PI, first image was my usual simple way: calibration, registration, integration, histrogramtransformation, deconvolution, and morphologicaltranformation; all took about 20 minutes. Second image was processed following instruction from PixInsight workflow example from their website, more fancy stuffs. I spent about 3 hours on this. Both were then minor adjusted with PS.

Please tell which one would you like or prefer.

Thanks for looking
David

[lazjen]

For me, I prefer the second one, but the first is fine too.

[Joshua Bunn]

second one is a little sharper for me, but both are great.

Josh

[RickS]

Nice work! The second one looks more detailed.

FYI, deconvolution is supposed to be done on a linear image. Doing this before the HT stretch may have improved the first version?

Cheers,
Rick.

[DavidNg]

Hi RickS, Thank you for letting me know. The second image involves masking, PixMath, etc quite a daunting task, glad that it looks better. Should I do other transformation before HT stretch as well?

Regards
David

[DavidNg]

Thanks for letting me know Joshua

[DavidNg]

Thanks Chris

[RickS]

David,

After a while the complex stuff becomes easier ;)

The main things you need to do before stretching are deconvolution, DBE gradient correction and colour calibration. It isn't strictly necessary to use DBE on linear data but it tends to work better.

Cheers,
Rick.

[DavidNg]

Thank you Rick for your advice. I found so far PI is complex, but very user friendly. Love the clone tool.
Regards
David