Author Topic: vdb142 - narrowband - have a try  (Read 13530 times)

Offline TeeJay

  • Newcomer
  • Posts: 25
    • View Profile
    • TeeJay's Astrophotography
Re: vdb142 - narrowband - have a try
« Reply #15 on: 2012 April 26 03:46:27 »
Hi Herbert,

I can explain you the steps if you like. But i'd like to do this in Skype, as I am from Switzerland we can speak german. ;)
You can write me at astro(ät)teejay.ch

CS
TeeJay

Offline Lex

  • PixInsight Guru
  • ****
  • Posts: 555
  • We do it at night...
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #16 on: 2012 April 26 08:09:27 »
...Vicent not Vincent  >:D
Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City

Offline TeeJay

  • Newcomer
  • Posts: 25
    • View Profile
    • TeeJay's Astrophotography
Re: vdb142 - narrowband - have a try
« Reply #17 on: 2012 April 26 09:31:45 »
I published the same workflow on another image here: link.

CS
TeeJay

Offline Herbert_W

  • PixInsight Addict
  • ***
  • Posts: 200
    • View Profile
    • Skypixels - Astrophotography by Herbert Walter
Re: vdb142 - narrowband - have a try
« Reply #18 on: 2012 April 26 10:19:58 »
Quote
...Vicent not Vincent  >:D

uups - sorry!

@TeeJay!
Quote
I published the same workflow on another image here: link.



Thank you for this additionel info - now I have to study a lot ;-)

Best regards.
Herbert, Austria

astropixel

  • Guest
Re: vdb142 - narrowband - have a try
« Reply #19 on: 2012 May 03 04:34:30 »
Well ??? First attempt at narrow band :o

Registered and ChannelCombination SII, HA, 0III. Colour calibration, HT luminance mask, HMT, LRGBCombination L*, ColourSaturation, HMT, ATWT, LocalHistogramEqualisation, Deconvolotion, CurvesTransformation.
« Last Edit: 2012 May 03 04:46:10 by astropixel »

Offline Lex

  • PixInsight Guru
  • ****
  • Posts: 555
  • We do it at night...
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #20 on: 2012 May 03 06:02:50 »
Quote
Well ??? First attempt at narrow band :o

Nice attempt I think!

Congrats!
Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City

astropixel

  • Guest
Re: vdb142 - narrowband - have a try
« Reply #21 on: 2012 May 03 17:37:50 »
2nd try. Is this approaching something like it. Hubble pallet ??? I apologize in advance.

Registration
ColourCalibration - not sure if this is necessary?
Stretch, Multiscale transform, saturate, curves and noise reduction

Combined as follows;

0.8*SII + 0.2*Ha
0.2*Ha + 0.8*OIII
OIII

Thanks Juan - http://pixinsight.com/forum/index.php?topic=3734.msg25646#msg25646

« Last Edit: 2012 May 05 01:12:18 by astropixel »

astropixel

  • Guest
Re: vdb142 - narrowband - have a try
« Reply #22 on: 2012 May 18 02:33:54 »
Had another go at this. I think this is the correct result. I'm not sure where I went wrong with the previous image.

Offline Lex

  • PixInsight Guru
  • ****
  • Posts: 555
  • We do it at night...
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #23 on: 2012 May 19 14:35:35 »
Hi Astropixel,

The only thing that is IMHO not as it "should be" is the star coloring, for me it is to greenish, try  some SCNR to green or perhaps tighten the green channel with curves...
NB images always tend to result in some unnatural star colors..

Best
Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City

astropixel

  • Guest
Re: vdb142 - narrowband - have a try
« Reply #24 on: 2012 May 19 17:45:21 »
Something like this?

Offline Lex

  • PixInsight Guru
  • ****
  • Posts: 555
  • We do it at night...
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #25 on: 2012 May 20 00:34:33 »
Absolutely, this one is really nice!
When you create a starmask and invert it to protect the background you will be able to "whiten" up the stars even more!

Nice
Clear Skies!!

Lex

______________________________________

AZEQ6 GT, TS UNC 10" f5, ASI1600mm-c

HADSO (Hagen Deep Sky Observatory)20 km W of Luxemburg City

Offline mcbbcn

  • PixInsight Enthusiast
  • **
  • Posts: 78
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #26 on: 2012 November 13 15:14:34 »
Hi,

As I'm learning about bi-color combination, I took your Ha & OIII and apply the Cannistra method...now, I intend to figure out how to do it in Pixinsight...but this is the result so far using PS...more to come...

By the way, I know it's overstretch, but I was more interested to see the color balance outcome...

Cheers,

M.

Offline starhopper

  • Member
  • *
  • Posts: 54
    • View Profile
    • starhopper
Re: vdb142 - narrowband - have a try
« Reply #27 on: 2012 November 14 04:06:03 »
Hello Herbert,

Quote
On the one side is the mixture of the channels with pixelmath

sorry I must say, I have no solution. To say it in clear words, we all need somebody who provides a mechanism to imitate Photoshops "selective colors".

My workflow:

PI:
HistgramTransformation with STF (auto) to all channels
RGB with Pixelmath: R=SII, G= 0,85xHa, B=OIII

PS: selective Color (to get the Hubble Color Feeling) and dynamic

PI:
StarMask (Scale=8, Smoothness=7, Small=2)
MT (Morphological Selection, Iter=10, Amout=0.15, Selection=0, Sitz 5)
2x Unsharp Mask (Std=0.8, Amount=0,75x)
JPG Export
Thomas Jäger
www.starhopper.de
12"f/3.8 & 8"f/2.9 Astrograph
SBIG STL11000M, Moravian G2 8300
Vixen Atlux Mount, Skywatcher AZ-EQ6 GT
Skywatcher Esprit 100/550

Offline Herbert_W

  • PixInsight Addict
  • ***
  • Posts: 200
    • View Profile
    • Skypixels - Astrophotography by Herbert Walter
Re: vdb142 - narrowband - have a try
« Reply #28 on: 2012 November 14 04:42:37 »
Hi Forum, Servus Thomas!

In the meantime, I gave it up, to find a standard routine.
But new Scripts are available - see: http://pixinsight.com/forum/index.php?topic=4853.0

Maybe, these Scripts makes an end to an undless jouney in the sho-universe.
But nevertheless, Photoshops "selective colors" will be the indicator.

> Thomas: thank you for image-processing and the parameters. I never get such intensive and bright colors with PI - there is still a lot to learn!

Thank you and best regards.

Herbert, Austria
« Last Edit: 2012 November 14 06:53:24 by Herbert_W »

Offline mcbbcn

  • PixInsight Enthusiast
  • **
  • Posts: 78
    • View Profile
Re: vdb142 - narrowband - have a try
« Reply #29 on: 2012 November 15 22:13:39 »
Well, I tried to simulate the Cannistra method in Pixinsight, and I don't think it came out too bad, your thoughts are welcome...this is just a Ha & OIII combination...I was quite surprise, as you can see yellow stars, blue stars, red stars, and there is a bit a pretty good color balance...

If somebody asks me to share the method, I'll be embarrassed  :-[ because as Sanders pointed out, there is more alchemy to the Cannistra method than science...but hey, it's not too bad if you're looking for colors that a lot of people are used to see in OSC shots.

Cheers,

M.

« Last Edit: 2012 November 15 22:19:29 by mcbbcn »