PixInsight Forum (historical)

PixInsight => Gallery => Topic started by: Harry page on 2011 May 11 13:01:49

Title: M106
Post by: Harry page on 2011 May 11 13:01:49

Hi

I have a little image of M106,  which I am sure plenty of you can do better ;D

But what I have managed to do on this image is intergrate Ha using the " Vincent Peris way " which uses a formula to ectract the line emission and add it to my image without affecting the stars to much , This is the best I have done with Ha  8)

Regards Harry

Full size here http://www.harrysastroshed.com/Image%20html/M106%202011.html (http://www.harrysastroshed.com/Image%20html/M106%202011.html)

p.s. Many thanks to vincent for his formulas

Title: Re: M106
Post by: Jules on 2011 May 11 13:19:01

Harry

A lovely image, works very well. When are you going to 'do' a tutorial on it (said with tongue firmly in cheek)

Regards

Julian

Title: Re: M106
Post by: Harry page on 2011 May 11 13:27:51

Hi

Well I think this is very important and a video will be coming shortley  8)

Harry

Title: Re: M106
Post by: sleshin on 2011 May 11 14:57:20

Harry, that's a fine image. Very well done.

Steve

Title: Re: M106
Post by: Giorgio on 2011 May 13 00:54:14

Great job Harry,
many fine details and background sky.
Giorgio

Title: Re: M106
Post by: jtalbot on 2011 May 19 16:04:38

Harry,

Don't fool yourself, this is a fantastic image.  Extremely well done.  Lovely color saturation, especially with the stars.

Jon Talbot

Title: Re: M106
Post by: Harry page on 2011 May 20 03:09:15

Hi Gents

Many thanks for looking , means a lot from top people like you


Harry

Title: Re: M106
Post by: gvanhau on 2011 May 20 08:10:35

Very nice image.
Do you have a copy of the image prior to applying Ha (in order to see the diference)?

Regards
Geert

Title: Re: M106
Post by: Harry page on 2011 June 12 08:55:02

Hi

As promised how to add Ha to a galaxy Image http://www.harrysastroshed.com/Hagalaxy.html (http://www.harrysastroshed.com/Hagalaxy.html)  , late as usual but Juan is a bad influence on me  ;D


Harry

Title: Re: M106
Post by: Jules on 2011 June 13 00:53:29

Hi Harry

I have been trying your methodology with respect to Ha and red. I use astrodon true-balance RGB with the red filter at 40nm to 50nm The filter size is 31mm which gives some very strange results when applied in pixel maths. Am I using the correct units?

Thanks for all the time and effort put into your videos.

Julian

Title: Re: M106
Post by: Nigel Ball on 2011 June 13 02:20:17

Harry

Another excellent video  :D

I have a question on the 'size of the Ha filter' in the first PixelMath expression. I am assuming should be the bandwith and maybe the problem Jules is having.

Nigel

Title: Re: M106
Post by: Harry page on 2011 June 13 02:56:33

Hi

Yes I did mean bandwidth , sorry if I confused you i will put a note online about that  O:)

Harry

Title: Re: M106
Post by: Harry page on 2011 June 13 12:29:09

Hi

Have altered front page to highlight my confusion  O:)

http://www.harrysastroshed.com/Hagalaxy.html (http://www.harrysastroshed.com/Hagalaxy.html)


Harry

Title: Re: M106
Post by: Jules on 2011 June 13 12:46:25

Thanks Harry

For a moment there I thought I had been taking thick pills, perhaps I have!

Title: Re: M106
Post by: Harry page on 2011 June 13 12:55:09

Hi

I don't need thick pills I was Born that way  ;)


Harry

Quote from: Jules on 2011 June 13 12:46:25

Thanks Harry

For a moment there I thought I had been taking thick pills, perhaps I have!

Title: Re: M106
Post by: Nocturnal on 2011 June 13 14:51:09

Nice picture Harry!

Title: Re: M106
Post by: Jules on 2011 June 13 23:44:53

Harry

Do you have plans to cover Atrous wavelet transform / convolution / deconvolution, your videos are really good and you have a really good way of putting across complicated subject matter.

Julian

Title: Re: M106
Post by: Howard on 2011 June 14 04:52:34

Hi Harry:

Your videos also got me off to the races. Bite sized, crystal clear, and covering alot of ground, they bust through the PixInsight learning barrier :). Many thanks for that!

The colors in the M106 image are gorgeous.

Best regards,
Howard.

Title: Re: M106
Post by: Harry page on 2011 June 14 09:58:46

Hi Gents

Thanks for the comments always very welcome  :laugh:

There is always more video's required  ;D and will try and do some more  8)  of course I am waiting for Juan to do some more  >:D

Has any body had success with the " vicent way " yet


Regards Harry

Title: Re: M106
Post by: sleshin on 2011 June 14 16:50:08

Hi Harry,

As always, your fine tutorials are very much appreciated. On this one, I wanted to look at Vicent's description of this method. Can you tell me where to find it. I have seen his tutorial on the PI site but that is really quite general and specific formulas are not included.

Thanks,

Steve

Title: Re: M106
Post by: Harry page on 2011 June 15 14:20:11

Hi

We did not get a full description and had to get the info straight from the horses mouth  :D

here was a bit of info he did release http://pixinsight.com/forum/index.php?topic=1982.0 (http://pixinsight.com/forum/index.php?topic=1982.0)

Regards Harry

Title: Re: M106
Post by: sleshin on 2011 June 15 17:19:08

Thanks Harry.

BTW, I have tried the method as described in your tutorial and it works beautifully. Galaxy and star color preserved with Ha areas enhanced. Appears that the amount of enhancement is controlled by the multiplication factor in formula #2.

I did look at the thread you just referenced and noted that Vicent was perhaps 1 or 2 paragraphs short of completing what would have been good documentation of this method. I really appreciate that you took the time to complete the job, and rather elegantly I might add.


Steve

Title: Re: M106
Post by: Harry page on 2011 June 16 10:11:40

Hi Steve

I am glad you found it worked well I was very pleased the method  :)

As you say the enhancement is controlled by multiplication factor in formula 2 and is of course subject to the quality of your Ha  ;D

I am looking forward to getting some more data so I can play more with this method  8)

Regards Harry

Title: Re: M106
Post by: Gian Corrado on 2011 June 19 10:25:52

Hi Harry,

Very nice picture !!!

Thank you for the tutorials videos...so useful for a novice as me... :)

Gian

Title: Re: M106
Post by: Lex on 2011 July 02 18:54:19

Harry,

That's a gorgeous picture again and I can assure you that I can't do it better  ::)

Best

Lex

Title: Re: M106
Post by: Howard on 2011 August 06 14:49:57

Hi Harry:

I've been processing LRGBHa exposures of the Bubble Nebula following your very clear workflow for Vicent's technique of blending the Ha into the R, whilst minimizing the added noise from the Ha.

I wonder if I goofed in retrospect to shoot the Ha frames binned 2x2 (and likewise for the RGB), with the L unbinned? I thought to copy the usual procedure of upsampling the "colour" channels into the higher resolution L. However, there is so much rich texture in the Ha, which does not appear to have been adequately captured in the unbinned L (though I'm a bit mystified as to why that should be, since the L ought to capture everything - maybe I've not adequately processed the L?).

Any suggestions for how best to adapt the workflow to LRGBHa, rather than RGBHa?

I'd also appreciate to hear any comments on whether to reshoot the Ha unbinned, and what might be the best relative exposure times and resolutions in Ha and R.

Many thanks,
Howard.