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clyde

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Posted on Tuesday, April 12, 2005 - 11:03 am:   Edit PostDelete PostView Post/Check IPPrint Post

.. I would desperately like to see a "half color" mode hack for the Nvidia Anaglyph Stereocsopic mode.
Is this at all possible by programmers who are reading this board?

The full color anaglyph is horrible and has severe retinal rivalry.

Thanks and regards
Clyde
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Aig

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Posted on Thursday, April 14, 2005 - 5:45 pm:   Edit PostDelete PostView Post/Check IPPrint Post

What is "half color" mode?
May be you can get it by adjusting colors in anaglyph properties of the driver.
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clyde

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Posted on Friday, April 15, 2005 - 11:23 am:   Edit PostDelete PostView Post/Check IPPrint Post

nope .. in short it involves greyscaling the red channel. (pkk will soon stumble on this post, and knowing him he'll fill you in on it, the perfectionist that he is ;)

Cheers
Clyde
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StereoGamer

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Posted on Wednesday, April 20, 2005 - 12:11 pm:   Edit PostDelete PostView Post/Check IPPrint Post

This post is in a rather obscure secton and PPK may not find it. Can you give us the details please?

- StereoGamer
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clyde

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Posted on Wednesday, April 20, 2005 - 1:04 pm:   Edit PostDelete PostView Post/Check IPPrint Post

LOL!
ok.. I'll try .. in brief.
basically with typical anaglyph, such as that done with the Nvidia anaglyph driver, or even in movies like spykids, there is a "glaring" sensation when looking at anything that contains pure red colors. (or for that matter when red is present in any quantity in objects in a scene)
this results in whats known as color rivalry or retinal rivalry.
you may not notice this immediately but after a while your eyes tire from all this, and this makes for why anaglyph has not enjoyed much success (apart from the fact that red/cyan filters in front of your eyes anyways make for uncomfortable viewing to a certain extent)

So "half color mode" is a process aimed at reducing this color or retinal rivalry.
we do this by removing the red channel entirely and thus Grey-scaling the left eye view.
actually you dont "delete" the red channel from the left eye view you just greyscale it.
(easier to explain if your familiar with photoshop)

anyhow hope im making sense, but im sure someone else can explain this better
cheers!
clyde
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StereoGamer

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Posted on Wednesday, April 20, 2005 - 8:17 pm:   Edit PostDelete PostView Post/Check IPPrint Post

So would an algorithm like the following work for the left eye view?:
Replace each RGB value in the pixels of the left eye view with R+G+B/3.
So a RGB value of 100 48 25 gets changed to 58 58 58 which is a greyscale value.
And right eyeview(cyan) is unchanged?

- StereoGamer
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clyde

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Posted on Wednesday, April 20, 2005 - 8:52 pm:   Edit PostDelete PostView Post/Check IPPrint Post

umm the math is the part i hate :(
Lets hope Peter Wimmer can explain this better,
I cant seem to find his formulas page on his site.
Regards
Clyde
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clyde

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Posted on Wednesday, April 20, 2005 - 9:02 pm:   Edit PostDelete PostView Post/Check IPPrint Post

oh here we go!
http://mitglied.lycos.de/stereo3d/anaglyphcomparison.htm


I favor the Halfcolor mode versus the optimized mode as half color is a little bit more lifelike.
Cheers
clyde

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