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

[oldwexi]

Hi Edo!
Thanks for your positive comment concerning the video.

For understanding astronomical image processing  generally, in detail and
understanding the used terms in astronomical image processing i recommend highly the book
The Handbook of Astronomical Image Processingb
from Richard Berry and James Burnell
http://www.willbell.com/aip/index.htm

For the deep mathematical theory there would be interesting:
Astronomical Image and Data Analyses
from Jean-Luc Starck and Fionn Murtagh
(i have it but i understand in maximum 5%...) But i think Juan uses it more for developing image processing methods...
http://www.springer.com/astronomy/astronomy,+observations+and+techniques/book/978-3-540-33024-0

These books care about theory and practical use and building up the understanding how image processing works.

Aloha
Gerald

[astroedo]

Thank you! I will buy the first one.

But Please continue with your tutorials 

[Geoff]

Hi Edo!
For understanding astronomical image processing  generally, in detail and
understanding the used terms in astronomical image processing i recommend highly the book
The Handbook of Astronomical Image Processingb
from Richard Berry and James Burnell
http://www.willbell.com/aip/index.htm

For the deep mathematical theory there would be interesting:
Astronomical Image and Data Analyses
from Jean-Luc Starck and Fionn Murtagh
(i have it but i understand in maximum 5%...) But i think Juan uses it more for developing image processing methods...
http://www.springer.com/astronomy/astronomy,+observations+and+techniques/book/978-3-540-33024-0

These books care about theory and practical use and building up the understanding how image processing works.

Aloha
Gerald

I have Berry and Burnell.  It's very good in some areas, especially on noise and image calibration.  There are a few weak points in some areas (de/convolution, wavelets), but on the whole it's pretty good and well worth getting if you want some idea of what Juan is doing in the background. It's probably the best introduction to see whether or not you want to get serious about theory.
There is also another good book (besides the one Gerald mentions) by Starck, Murtagh and Bijaoui Image Processing and Data Analysis, but it's not for the mathematically challenged.
Geoff

[Giorgio]

Thanks also from me,

if there was an Oscar she deserves.   

Giorgio. 

[Carlos Milovic]

Two another good books for understanding the basis behind most of the tools are:

"Digital Image Processing" by Rafael Gonzalez and Richard Woods
http://www.amazon.com/Digital-Image-Processing-3rd-Edition/dp/013168728X/ref=sr_1_2?ie=UTF8&qid=1364490766&sr=8-2&keywords=gonzalez+image+processing

"Image Processing: The Fundamentals" by Maria Petrou and Costas Petrou
http://www.amazon.com/Image-Processing-Fundamentals-Maria-Petrou/dp/047074586X/ref=sr_1_1?ie=UTF8&qid=1364490844&sr=8-1&keywords=petrou+image+processing

And another good book by JL Starck is "Sparse Image and Signal Processing" but it is much more advanced.

[gvanhau]

Thanks Gerald for sharing this video.
I see we can always learn different methods to achieve similar or even better results.

Regads
Geert

[Gerald]

Hi Gerald,

thanks for sharing your great experience!

Servus,
Gerald

[crose01]

Hi Gerald, this was 100% what I was looking for. I did have an issue with the exponential smoothing. I couldn't parse the F=14; statement.
I had to replace it with .40 or .20 in my case. This was with v1.0.8 Ripley on OSX.

Regards

Chris

[oldwexi]

Hi Chris!
If you look in the PixelMath Window in the Video you will see in the middle the line
Symbols:  F

In Symbols: you define variables for calculations,
in our case we are using F with the values 0.4 and 0.2 .
If you dont define in Symbols a variable of an Expression you get a Parse error.

You did completely right, when you replaced F in the PixelMath Expression by 0.4 and 0.2
it delivers the same correct result without using a variable F.

Gerald

[sil]

Gerald

Many thanks for the great video tutorials. It's often unclear from documentation exactly *what* something does and playing around using bad values doesn't help. You video has opened up some of the tools and taken my processing to a new level (now I am forced to go back over old data and re-process images I used to think were good at the time).

I've been able to modify you technique from this video to help me subdue, round and colourise dominant stars so I can bring out the fainter stars a bit more to showcase dark structures better. While I still don't understand the tools yet, I understand them enough to apply them practically.

Thanks again!