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Author Topic: CS6 Levels and Curves confusion  (Read 1629 times)

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Offline Uplooker

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CS6 Levels and Curves confusion
« on: 17:50:46, 03 September, 2016 »
Warning - Numpty Alert,

I struggle with processing images, part of the reason that do not post many / any images here.
I am trying to process LRGB data that I captured of NGC 6992,  currently only on the Lum data, which consists of 20 x300sec.
I have been watching and reading various tutorials. May be because of that my head well and truly addled.

So my question is, why when I look at the Levels & the Curves is the peak way to the left on one and way to the right on the other. Should they both not be to the left or right?
Hopefully the images below demonstrate my point - if they load correctly :surprise:

All assistance gratefully accepted.

 
Ian

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Offline chris.bailey

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Re: CS6 Levels and Curves confusion
« Reply #1 on: 18:00:32, 03 September, 2016 »
The black point (little black triangle) is to the left hand side on the levels display and to the right hand side on the curves display. The black point is normally (at least in my world) to the left. I'm sure there is an option somewhere in the curves tool to swap them around but would not have the first clue as to where it may be hidden. Maybe that hand tool that seems to be given it the thumbs down. If that is the default arrangement, it just goes to underline my dislike of Photoshop
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Offline Uplooker

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Re: CS6 Levels and Curves confusion
« Reply #2 on: 18:37:50, 03 September, 2016 »
Ha ha Chris,
Yes, I am actually familiar with the terms Black, White and Mid-point
The hand tool is so that I may use a tool to identify where on the curve various elements of the image exist.
You may dislike Photoshop but that is no reason for me  to start using Pixinsight


Sent from my Fone
Ian

Scopes: SW 150P Newt, ST80, Celestron C8 XLT, TAL 100RS / PST Stage 2 Mod & BF10, SW 300PDS (soon to be on a Dob Mount)
Cameras: SPC900, QHY5, Canon 450D, DMK31AU03.AS
Mounts: NEQ6 powered by EQMod, EQ3-2

Offline chris.bailey

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Re: CS6 Levels and Curves confusion
« Reply #3 on: 18:58:45, 03 September, 2016 »
Ian

If you click on "Light (0-255)" rather than "Pigment Ink %", I think you will find the curve tool then matches up with the histogram tool.

I can think of no valid reason for you to start using PixInsight other than perhaps your own words "I have been watching and reading various tutorials. May be because of that my head well and truly addled."

Chris
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

Offline Uplooker

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Re: CS6 Levels and Curves confusion
« Reply #4 on: 19:07:10, 03 September, 2016 »
Ian

If you click on "Light (0-255)" rather than "Pigment Ink %", I think you will find the curve tool then matches up with the histogram tool.

I can think of no valid reason for you to start using PixInsight other than perhaps your own words "I have been watching and reading various tutorials. May be because of that my head well and truly addled."

Chris

Hi Chris,
Thank you. I did eventually find the same answer. See here:- https://forums.adobe.com/thread/1433811

No idea how I managed to change it in the first place.

Thank you again.

Ian
Ian

Scopes: SW 150P Newt, ST80, Celestron C8 XLT, TAL 100RS / PST Stage 2 Mod & BF10, SW 300PDS (soon to be on a Dob Mount)
Cameras: SPC900, QHY5, Canon 450D, DMK31AU03.AS
Mounts: NEQ6 powered by EQMod, EQ3-2

Offline Roger B

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Re: CS6 Levels and Curves confusion
« Reply #5 on: 20:33:21, 03 September, 2016 »
That's thrown me out a few times before. 

Still does now and then but then I realise I'm inverting the image. lol

Rog
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Offline PaulB

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Re: CS6 Levels and Curves confusion
« Reply #6 on: 11:30:20, 04 September, 2016 »
A certain lady who frequents our forum has put together a good workflow for doing this.

https://sites.google.com/site/caroleastroimaging/home/processing-in-photoshop
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Offline Annie

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Re: CS6 Levels and Curves confusion
« Reply #7 on: 13:37:30, 04 September, 2016 »
Sara Wager also has some good tutorials on her website: http://www.swagastro.com/my-guide-to-image-capture.html

Annie
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Offline Carole

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Re: CS6 Levels and Curves confusion
« Reply #8 on: 23:19:39, 04 September, 2016 »
Quote
A certain lady who frequents our forum has put together a good workflow for doing this.

https://sites.google.com/site/caroleastroimaging/home/processing-in-photoshop

 :embarrass: :embarrass:
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