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PhotoShop CS6 is confused!!

New Here ,
Mar 05, 2018 Mar 05, 2018

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I am and have been using Photoshop CS6 (64 bit) for the past few years with no problems. Recently while editing my photos (The process I use follows these 3 steps.  1- Adjust Levels; 2 - Adjust Curves; 3 - Adjust Hue/Saturation) I get a strange problem.

Step 1 (Levels) works fine and causes no issues

Step 2 (Curves) is where the issue occurs. I select "Curves" via the Create new fill or adjustment layer icon located in the lower right of the screen and another Levels adjustment box pops up, but no Curves. Hue/saturation works fine. Once in a while I am able to get the Curves box to show up, but the histogram has vertical lines thru it.

I was going to uninstall and then reinstall Photoshop, but I cannot seem to find my disk

Any help would be greatly appreciated

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correct answers 1 Correct answer

Community Expert , Mar 06, 2018 Mar 06, 2018

You are working in 8 bits per channel which only gives 256 possible levels for each color (RGB). Applying a curves adjustment after a levels adjustment (or vice versa) will start to introduce gaps in fact with radical adjustments the histogram can start to look like a comb.

The solution is simple - convert the image to 16 bit before applying the adjustment layers.

Dave

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Community Expert ,
Mar 05, 2018 Mar 05, 2018

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What have you done for trouble-shooting so far?

Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:

https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html

Could you please post screenshots the pertinent Panels (Layers, Channels, Properties, Options Bar, …) and dialogs visible?

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New Here ,
Mar 05, 2018 Mar 05, 2018

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Screenshot (2) (Medium).png

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Community Expert ,
Mar 05, 2018 Mar 05, 2018

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Looks like the regular Curves display to me.

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Community Beginner ,
Mar 05, 2018 Mar 05, 2018

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I think it's your software problem. When you open Photoshop , please check your

system and also do update your adobe Photoshop CS.

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Community Expert ,
Mar 06, 2018 Mar 06, 2018

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You are working in 8 bits per channel which only gives 256 possible levels for each color (RGB). Applying a curves adjustment after a levels adjustment (or vice versa) will start to introduce gaps in fact with radical adjustments the histogram can start to look like a comb.

The solution is simple - convert the image to 16 bit before applying the adjustment layers.

Dave

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New Here ,
Mar 15, 2018 Mar 15, 2018

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How can you tell I am in the 8 bits per channel? How can I convert to 16?

Thanks,

Mike

Michael R. Douglas

"For I know the plans I have for you", declares the Lord, "Plans to prosper you and not harm you, plans to give you hope and a future" Jeremiah 29:11

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Community Expert ,
Mar 15, 2018 Mar 15, 2018

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How can you tell I am in the 8 bits per channel? How can I convert to 16?

Image > Mode

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