New Video-Tutorial How to Enhance faint Nebula without pushing the Stars

[oldwexi]

Hi !
My new PixInsight Tutorial Video 
"How to Enhance faint Nebula without pushing the Stars" is available now in english. .
You can find this video via my homepage on my PixInsight Tutorials page:
http://www.werbeagentur.org/oldwexi/PixInsight/PixInsight.html
or directly from the dropbox via:

http://dl.dropbox.com/u/57910417/Howto_enhance_nebuala_without_pushing_stars.wmv
The duration of the video is 20 minutes. Filesize 63MB.

It shows the removal and reduction of stars in an image to have the "nebula only" pushed,

Also some stretching methods with PixelMath to stretch images with Exponential Transformation and/or masks
are in this video.

Hope it helps and gives some ideas for processing of faint nebulae, creating masks and
using PixelMath.

German version of this will be there also in a few days, Next tutorial video now will be "PixelMath II"

Aloha
Gerald

[pfile]

very interesting techniques! thanks for that video, i'm sure it will come in handy.

i didn't know about the ~<variable> thing. i guess i thought that would evaluate to 1/<variable> rather than (1-<variable>).

rob

[Alejandro Tombolini]

Hi Gerald, excellent video, I look forward for PixelMath II as there is a lot to learn with that tool.
I will need to practice to understand how the formula works when you merge the images. 
Thank you very much for sharing it. 
Saludos. Alejandro.

[Geoff]

Very nice Gerald
Your all-round knowledge of techniques in Pixinsight is amazing.
Geoff

[Geoff]

i didn't know about the ~<variable> thing. i guess i thought that would evaluate to 1/<variable> rather than (1-<variable>).
rob

Hi Rob
See here http://www.pixinsight.com/tutorials/PixelMath/en.html under "Operators", about 20%of the way into the tutorial:

~x is equivalent to 1 - x, where x is expressed in the normalized real range from 0=black to 1=white.

Geoff

[pfile]

thanks Geoff.

[starhopper]

Thank's Gerald for this great tutorial, I like it.
Is it possible to post the pixelmath formulas in this thread, I cannot read it from the video.

Thomas

[Ioannis Komianos]

Your video tutorials are very useful.
Thank you Gerald !

[niteman1946]

Fascinating video Gerald.

Thanks for your excellent effort.

Mark

[oldwexi]

To all!
Thanks for your kind comments. Its a pleasure for me.

@Thomas
Please find an imagelink below  where the 3 used PixelMath Steps are in high resolution visible.
Left one PM     final stretch of image s
middle one PM first stretch of image o with image s
right one PM second stretch ofimage o with image s
http://www.werbeagentur.org/oldwexi/fotos/PixelMathParm_extracted.jpg

Thomas, I am surprised that you cannot read in the video the PixelMath text ?
I have produced this video in 1440x900 Pixel high resolution,  if you resize the video during playing to fullscreen
everything should be readable in high resolution.
If everybody else also can play the video only in low unreadable resolution please let me know
i have to check what i made wrong.
When i load the video on another notebook everything here is in high resolution and perfect readable.

If it helps i can provide the video also in MP4 format...

@Alejandro
Yes, i have my hands already at the PixelMath II video. When i read my storyboard - today it looks to complex,
when i change the storyboard and read it tomorrow it looks boring... I am loosing most of the time
in searching for the right complexity so that it will help to improve image processing and not only shows
how mighty PixelMath is...

Aloha
Gerald

[starhopper]

Thomas, I am surprised that you cannot read in the video the PixelMath text ?

I tried it with two players but did not succeed.
Thank's for providing the screenshoot.

[pfile]

even VLC? that's what i used on macosx and it looked great full screen.

[oldwexi]

@Thomas!
Here the link to the MP4 version. Hope this runs better on your computer.
http://dl.dropbox.com/u/57910417/Howto_enhance_nebuala_without_pushing_stars.mp4
It runs correct on my computer with VLC und Winzigweich Mediaplayer

Gerald

[astroedo]

Really a good tutorial (and a wonderful picture!!!)
I'm amazed by the BIG power of pixel math (if you know how to use it) and i would like to learn more about it (in general sense and not only in Pixinsight).

Waiting forward for your PixelMath II tutorial, could you recommend me a good book about image processing?

In English or Italian.

Thank you!

Edoardo

[marekc]

Thank you so much for posting this tutorial, Gerald!

I watched the video yesterday, and I'm really excited to try your methods. The thing that impressed me most about your video is the method for generating a `large-stars' mask. Although I haven't tried it yet on my own data, your method strikes me as brilliant. Finally, a suggestion for how to deal with the biggest, brightest stars! I can't wait to give it a shot.

- Marek