NGC6188 Bicolour Narrowband Processing Challenge

[codemonkey]

If anyone's suffering from some cloudy nights and looking for something to do, I've made available my recent Ha (https://www.dropbox.com/s/trtz9umu41hlv5y/ha.fit?dl=0) and OIII (https://www.dropbox.com/s/5mxxtf1fhjcaakl/oiii.fit?dl=0) integrations of NGC6188 as 16-bit fits. I think there's a touch over 7hrs of data there.

I'm keen to see what the everyone else is able to do with this data, because I'm a total newbie when it comes to narrowband processing.

[niharika]

a quick one

[Geoff45]

Here's a quick go: ha->R, oiii->G, 90%oiii+10%ha->B.
Play around with the combo in the blue channel to tweak the overall colour.
Geoff

[codemonkey]

Nice work guys! If you don't mind posting the software used to process the images and a quick run down on what you did, that'd be quite helpful to myself and others I imagine.

[Geoff45]

I used Pixelmath in PixInsight to combine the images, then ABE, BackgroundNeutralization and then HistogramTransformation--nothing fancy. You could also use Curves to saturate a bit more

[LewisM]

A different take on it.

Partial Sidonio Magenta, partial red...

[LewisM]

And now the traditional look. My favourite style.

Nice data Lee!

[codemonkey]

Thanks mate!





Cheers Lewis! Nice work; I prefer the more traditional look too. Mind posting software / processing details?

[RickS]

OK, so I felt obliged to go a bit over the top and do something a little different since we had plenty of more traditional treatments ;)

Using PixInsight: I blended the Ha and Oiii to make a Luminance. I mangled the Ha to red/orange tones using PixelMath and CIE Lch channel combination then used the Oiii as a mask and added some blue with CurvesTransformation. I stretched the Lum and colour, did a small star reduction and combined them. Then I tweaked the contrast a bit with LHE and HDRMT...

Cheers,
Rick.

[Geoff45]

The expert strikes again. Well done Rick.

[RickS]

Thanks, Geoff, but it's mostly lack of inhibition rather than expertise here :lol:

[Atmos]

This is probably the first time that I've ever really tried using PI. Actually only the second time that I have had something other than JPG files to play with in it so I have probably gone a little overboard mind you!!

Ha - Red
Ha+OIII - Green
OIII - Blue

Played around with the saturation and curves, slightly decreased the overall blue response, especially after slightly increasing the saturation, stars got a bit too blue. Ran a reasonably weak denoise and then an UnSharpMask.

Wanted to go a little left of field colour wise to everyone else. By no means natural but I like the green.

Edit: Possibly shouldn't have tried to flatten the field quite so much though, destroyed the lower left corner a bit :/

[Geoff45]

Nice one Colin.

[Placidus]

Long live green. Nicely done.

[codemonkey]

Nice work Rick! Interesting process there using OIII as a mask for introducing blue; wouldn't have thought of that.



Nice work, Colin, good to see something a little different. Good work especially seeing it was your first time using PI. Try using deconvolution rather than USM; when you can get the right parameters it works rather nicely.

[LewisM]

My final attempt.

Apart from integration, everything done in PS CS5.1

[Bart]

Here is my attaempt. I left it native size for you to sus out as well "as it came out in the wash" colour.

Thanks for the play.

http://www.pbase.com/grahammeyer/image/160709159

:D

[codemonkey]

Nice work again, Lewis. I'm surprised, I would have picked you for a PixInsight man.



Nice one Bart! I like the detail you've retained in the darker areas while still getting some nice contrast.

[nebulosity.]

G'day Lee,

I thought I'd give this a go to, processed in StarTools with Ha as red and Olll as blue with a synthetic green.

I tried to give it a bit of a gold and blue look with contrast between the creamy gas and jagged edges of the dust clouds.

Thanks for looking and for providing the data, it was a lot of fun.

Cheers
Jo

[strongmanmike]

...ahhh...:sadeyes:...wha? :face: OH, nooow I know what you mean, of course ..yeees, I see....:question:

:driving: :bashcomp:

Interesing to see all the different takes (including the mandatory Lewis/Magenta/Sidonio reference version :lol:)

Mike

[Atmos]

Started back from scratch again and had the aim this time of toning down the excessive processing, think I got a much better result. Still wanted the green obviously :P

[rustigsmed]

great, i'll have a crack tonight Lee :thumbsup:


would be happy for more people to post data in these dark times of Cloud.

[codemonkey]

Nice one Jo, love the colour; I think this is my favourite one yet

[codemonkey]

Good stuff Russ. I'm happy to keep posting my data on the rare occasions I manage to get anything. It'd be great if Astrobin's public data pools were free to submit to, but I understand why it's not, given the cost of hosting potentially very large data sets.

[rustigsmed]

here is my crack at it lee,

R Ha
G Oiii (56%) -ha(44%)
B Oiii

uploaded to flickr as well as not sure how the compressed version will go (note i couldn't get it to upload)
.
it also may be a touch dark as i processed on the tv.

https://www.flickr.com/photos/80336656@N07/19035609024/in/dateposted-public/lightbox/


cheers :thumbsup:

russ

[codemonkey]

Nice one Russ! I was trying for something similar the last time I was playing with this data but couldn't quite get it. Did you process with PI? If so, can you give me a quick run down on your process?

[rustigsmed]

Cheers Lee, I just quickly made a less dark version on the work computer https://www.flickr.com/photos/80336656@N07/19060752923/in/dateposted-public/lightbox/ - its not great as the file size was tiny but a bit more like what I was after. Got to say it was a treat using such nice data, way better than dslr.

Unfortunately I haven't got PI as yet. This was all done in photoshop, I didn't worry about sharpening or masking just tried to get the colours to be diverse. So opened all the images up and created duplicated one of the files. then copied the other image and pasted as a layer. merged them with the ratio being slightly more of Oiii (as its fainter). Then converted mode to rgb, pasted the Ha into red and Oiii into blue (the blend remaining in the Green channel).
from there I tweaked with selective colour' probably did a lot of iterations, similar to how it was done in that other link I sent you the other day. hope that helps somewhat - sorry I can't help with PI.

Russ