Thors Helmet in bicolour slight repro - Page 2

gregbradley · #21 11-12-2009, 05:04 PM

Quote:

Originally Posted by Ken

Great work Greg plenty of detail and very natural looking colour for a bicolour
clear skies Ken

Thanks Ken. The formula is Ha (red) O111+Ha/2 Green and O111 blue.

You combine a Ha and O111 and then use the pixel math function to divide it by 2.

Greg.

AlexN · #22 11-12-2009, 05:07 PM

Greg, you could do something somewhat different with that data too, and use Ha O3 O3 as RGB. This will give a seemingly natural colour image, with slightly muted greens... Ha O3 Ha+O3, Ha and O3 blended say, 40:60 in screen mode in photoshop...

The joys of narrowband! You can just do whatever the hell takes your fancy!

spearo (Frank) · #23 11-12-2009, 05:26 PM

oooooh
lots of very nice detail in there!
I'm jealous!
frank

gregbradley · #24 11-12-2009, 05:33 PM

Quote:

Originally Posted by AlexN

Greg, you could do something somewhat different with that data too, and use Ha O3 O3 as RGB. This will give a seemingly natural colour image, with slightly muted greens... Ha O3 Ha+O3, Ha and O3 blended say, 40:60 in screen mode in photoshop...

The joys of narrowband! You can just do whatever the hell takes your fancy!

Thanks Alex. I may give that a go. There is also this link by Steve Canistra about bicolour. I did not go to that extent merely Ha is red, O111 + Ha divided by 2 was green and O111 was blue. I've used that before and it worked well on the Tarantula. I'll play around with it. The LRGB will need more deconvolution and remastering and that will take time.

Quote:

Originally Posted by spearo

oooooh
lots of very nice detail in there!
I'm jealous!
frank

Thanks Frank!

gregbradley · #25 11-12-2009, 05:35 PM

Quote:

Originally Posted by drjcaron

Hi Greg, really nice work. I tried an additional decon on the image and produced an improved result. There were artifacts due to the jpeg compression, but it shows that even more blur can be removed If you tweak your parameters on your decon, using the original data, you should get a show-stopper.
Best Regards,
Jim C

What parameters were you using with deconvolution?

I am not 100% sure how deconvolution works. I'll have to study up on it.

A bit like creating an unsharp mask that removes the blur?

Greg.

strongmanmike (Michael) · #26 11-12-2009, 06:01 PM

Quote:

Originally Posted by AlexN

The joys of narrowband! You can just do whatever the hell takes your fancy!

Yeh, I too was iffy about the look of this dark art imaging when I had no NB filters but now I love it because of just like you say

Mike

gregbradley · #27 12-12-2009, 12:06 AM

I took the advice to try to sharpen it even more. I am amazed at how much this image sharpened up compared to the original O111.

I used Focus magic Photoshop plugin plus selective sharpening on the helmet area only and it coaxed out even more detail.

I'm now beginning to appreciate the sharpness of the TEC180mm's optics. The seeing was good but its often that good at my site.

http://upload.pbase.com/gregbradley/...40813/original

Greg

AlexN · #28 12-12-2009, 12:17 AM

Thats real nice Greg! Real Real Nice...

Yes your optics are incredibly sharp.. I can see the beginnings of detail in the little dusty spots at the bottom of the bubble, texture in the wings...
Amazing... Definitely the most detail I've seen in this nebula..

It also looks like you might have coaxed a touch more nebulosity out of it too..

Fantastic.

drjcaron (Jim Caron) · #29 12-12-2009, 02:58 AM

Quote:

Originally Posted by gregbradley

What parameters were you using with deconvolution?

I am not 100% sure how deconvolution works. I'll have to study up on it.

A bit like creating an unsharp mask that removes the blur?

Greg.

Hi Greg,
I used my program Tria (full disclosure: I am a vendor.) to do the blind decon with the default values. My site does have a brief overview of blind deconvolution at http://www.quarktet.com/BlindDecon.html and there is a decent explanation of the unsharp at http://en.wikipedia.org/wiki/Unsharp_masking .

Hope that helps,
Jim C

troypiggo (Troy) · #30 12-12-2009, 07:29 AM

That's absolutely fantastic. Best Thor's Helmet I've seen. Planning to add SII to it?

strongmanmike (Michael) · #31 12-12-2009, 09:26 AM

That bubble is positively bursting

Mike

sjastro · #32 12-12-2009, 10:21 AM

Excellent image Greg.

Steven

gregbradley · #33 12-12-2009, 12:15 PM

Quote:

Originally Posted by AlexN

Thats real nice Greg! Real Real Nice...

Yes your optics are incredibly sharp.. I can see the beginnings of detail in the little dusty spots at the bottom of the bubble, texture in the wings...
Amazing... Definitely the most detail I've seen in this nebula..

It also looks like you might have coaxed a touch more nebulosity out of it too..

Fantastic.

Thanks Alex. I am very happy with this scope. Its a keeper.

Quote:

Originally Posted by drjcaron

Hi Greg,
I used my program Tria (full disclosure: I am a vendor.) to do the blind decon with the default values. My site does have a brief overview of blind deconvolution at http://www.quarktet.com/BlindDecon.html and there is a decent explanation of the unsharp at http://en.wikipedia.org/wiki/Unsharp_masking .

Hope that helps,
Jim C

Thanks Jim. I've downloaded a demo of your program to try it out.

Quote:

Originally Posted by troypiggo

That's absolutely fantastic. Best Thor's Helmet I've seen. Planning to add SII to it?

I took some S11 but not enough. It is pretty dim in S11. I can add some later.

Quote:

Originally Posted by strongmanmike

That bubble is positively bursting

Mike

Thanks Mike. I was surprised at how much I was able to sharpen it up.

Quote:

Originally Posted by sjastro

Excellent image Greg.

Steven

Thanks Steven.

Greg.

Paul Haese · #34 12-12-2009, 01:05 PM

Nice shell showing there now.

gregbradley · #35 14-12-2009, 08:22 AM

Quote:

Originally Posted by Paul Haese

Nice shell showing there now.

Thanks Paul.

Greg.

jase (Jason) · #36 14-12-2009, 05:27 PM

Impressive result Greg. An Ha:OIII:OIII combo would look equally pleasing, but probably not as natural as a synth green. Well done.

gregbradley · #37 14-12-2009, 05:41 PM

Quote:

Originally Posted by jase

Impressive result Greg. An Ha:OIII:OIII combo would look equally pleasing, but probably not as natural as a synth green. Well done.

I may try that. And thank you for letting me know Thors Helmet shows up best in O111.

Cheers

Greg.

Jeffkop (Jeff) · #38 15-12-2009, 07:54 PM

Awesome as usual Greg ... the leaders in this field are truly in a league of their own. Everytime I see an image such as this Im reminded of it ... just as everytime I am humbled.

gregbradley · #39 16-12-2009, 06:47 PM

Gee whiz Geoff, thanks mate. How's it going with the BRC?

Greg.