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Windows 7: Reduce brightness of Screen (Not whole screen)

28 Jul 2016   #11
Sadiqeen

Windows 7 32 bit
 
 

Quote   Quote: Originally Posted by Callender View Post
The only way I know is to use a custom color profile - that's not something that I'm expert on.
Attachment 389881
Attachment 389882
Attachment 389883
This applies to whole screen, not just for white pixels. i want all other color remain unchanged.


My System SpecsSystem Spec
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28 Jul 2016   #12
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

Define a white pixel. How many shades of white exist?

Anyway the closest I've got so far is using Adobe Gamma and I didn't even know that I had it. As far as I know you can only get it with old versions of Photoshop.
Reduce brightness of Screen (Not whole screen)-adobe-gamma-control-panel.jpg
Reduce brightness of Screen (Not whole screen)-white-point.jpg
Reduce brightness of Screen (Not whole screen)-white-point-2.jpg
See more about "White Points" here:

ColorWiki - Monitors Part Two

Anyway it allows a custom white point to be defined. White still looks white but less white if you know what I mean. It seems to mean spending a lot of money for an old version of Photoshop in order to get Adobe Gamma and even then you might find that it is not exactly what you are looking for.

I still stay your best bet is some sort of monitor color calibration software.

As far as I can work out monitor uses a color profile that uses a color lookup table based on RGB values and not individual shade pixels.

Monitor Calibration for Photography

So yes you can swap specific pixels in images but I can't see how it can be done with colors that are displayed by graphics cards/ monitors.


My System SpecsSystem Spec
28 Jul 2016   #13
Sadiqeen

Windows 7 32 bit
 
 

Well i have adobe gamma, i tried it and i found that the calibration of WARM and COLD thing applies to whole screen, it works similar to f.lux software. Adobe gamma is not the thing i want.

I use a software called Twilight, this software reduces the brightness of whole screen no matter what is on screen, whether i am playing a game, or browsing, or watching video or whatever. It reduces the brightness of all colors (all pixels) in screen. what i know is that the screen usually run on 60 fps, this means that this software (twilight) does this thing 60 times each second. It reduces the brightness of all pixels (all colors/all shades/warm/cold/all) of screen 60 times in each second.

Isn't is possible to make a software which does exactly same thing but not to whole screen, only the white pixels, i mean that it find out the white pixels (or shades closer to white whatever degree kelvin it has) and changes it to some other color, say grey color

for example when this window Reduce brightness of Screen (Not whole screen)-white-2.png come on screen, it changes all the marked while pixels to grey. there are some other unmarked white pixels, in icons


My System SpecsSystem Spec
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28 Jul 2016   #14
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

I don't think that it's possible to change specific pixels. It's certainly possible when working with images. If there's a way to adjust only specific pixels as displayed on a monitor then I don't know of it.

The closest thing I've found so far is software to adjust the LUT (Look Up Table) that is used when applying color profiles.

I cannot give decent advice on this and my ideas are untested. I did find software that can make changes to the LUT and apply on boot. Howvever I have not been brave enough to test.

So the theory goes:

A Look Up Table is used by default. Software might be able to be configured to use a different Look Up Table on boot.

Here's a custom LUT that I saved.
Reduce brightness of Screen (Not whole screen)-curve_cr3.jpg
In theory 255 255 255 is whitest and numbers below 255 are lesser shades of white as you see in the earlier screenshot that shows 237 237 237 is used in my text editor as the background color.

So in theory if we modify the LUT with lower numbers being used against white 255 and lower it should result in less bright white being shown. However I have no idea if this is actually the case.
Reduce brightness of Screen (Not whole screen)-curve_cr3_2.jpg
If the modified file is loaded in LUT on boot then it should work.
Reduce brightness of Screen (Not whole screen)-lut.jpg
That's as far as I am willing to test. I'm not actually going to make the changes needed to load a modified LUT on boot - at least not until I decide to make my next system image backup.


My System SpecsSystem Spec
28 Jul 2016   #15
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

Also re: video

The video player that I use does have "pixel shaders" but again they just change the overall color/ brightness/ saturation and shades rather than specific pixels.
Reduce brightness of Screen (Not whole screen)-video-pixel.jpg


My System SpecsSystem Spec
29 Jul 2016   #16
Sadiqeen

Windows 7 32 bit
 
 

Quote   Quote: Originally Posted by Callender View Post
I don't think that it's possible to change specific pixels. It's certainly possible when working with images. If there's a way to adjust only specific pixels as displayed on a monitor then I don't know of it.

The closest thing I've found so far is software to adjust the LUT (Look Up Table) that is used when applying color profiles.

I cannot give decent advice on this and my ideas are untested. I did find software that can make changes to the LUT and apply on boot. Howvever I have not been brave enough to test.

So the theory goes:

A Look Up Table is used by default. Software might be able to be configured to use a different Look Up Table on boot.

Here's a custom LUT that I saved.
Attachment 390038
In theory 255 255 255 is whitest and numbers below 255 are lesser shades of white as you see in the earlier screenshot that shows 237 237 237 is used in my text editor as the background color.

So in theory if we modify the LUT with lower numbers being used against white 255 and lower it should result in less bright white being shown. However I have no idea if this is actually the case.
Attachment 390039
If the modified file is loaded in LUT on boot then it should work.
Attachment 390040
That's as far as I am willing to test. I'm not actually going to make the changes needed to load a modified LUT on boot - at least not until I decide to make my next system image backup.
This one may work, but it requires Boot to load
Thank you Callender and others for all your help, If ever in future you find such software (like twilight), then please tell me here in forum.
My System SpecsSystem Spec
29 Jul 2016   #17
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

No worries. I plan to test with a modified LUT sometime in the not too distant future. If you want to do you own testing:

Calibrilla Download

The problem is with knowing which values to write to the LUT. For me it will be a question of trial and error. There is no way I would attempt LUT modification without creating a system image backup first.
My System SpecsSystem Spec
30 Jul 2016   #18
Sadiqeen

Windows 7 32 bit
 
 

Quote   Quote: Originally Posted by Callender View Post
No worries. I plan to test with a modified LUT sometime in the not too distant future. If you want to do you own testing:

Calibrilla Download

The problem is with knowing which values to write to the LUT. For me it will be a question of trial and error. There is no way I would attempt LUT modification without creating a system image backup first.
Yes, system image is first option. Another and biggest problem is that, to apply changes it requires boot
My System SpecsSystem Spec
30 Jul 2016   #19
Callender

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

So you need something to change white to "less white" on demand then. Obviously modifying LUT would not allow on demand switching.
My System SpecsSystem Spec
30 Jul 2016   #20
Sadiqeen

Windows 7 32 bit
 
 

Quote   Quote: Originally Posted by Callender View Post
So you need something to change white to "less white" on demand then. Obviously modifying LUT would not allow on demand switching.
yes, thanks for all your help. if i found something, i'll post here
My System SpecsSystem Spec
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