POV-Ray : Newsgroups : povray.binaries.images : Lego rescue vehicles : Re: Gamma? Server Time
31 Jul 2024 06:25:59 EDT (-0400)
  Re: Gamma?  
From: clipka
Date: 2 Apr 2010 18:03:31
Message: <4bb669b3$1@news.povray.org>
Am 02.04.2010 22:44, schrieb TC:

> I have done a bit of measuring. You are right, there is a bit of green
> in the victims face. I am posting a screencopy of the face to show you
> what line I used to sample the colorvalues (red rectangle, pixels from
> right to left):

> I first did measure the original png-picture.
> <128, 128, 1>, <255, 255, 27>, <255, 255, 59> (9 pixels, same value)

I have a <255,255,52> in the original picture as 3rd value before the 
multiple <255,255,59>.

> Then I measured a screencopy of the png-file as displayed in Outlook
> express:
>
> <117, 117, 1>, <255, 255, 20>, <255, 255, 49> (9 pixels, same value)

Thunderbird doesn't seem to tamper with the colors. Though the reason 
might be that I'm using sRGB as color profile in Windows, with the 
calibration being taken care of by the graphics card drivers.

> Conclusion: when >I< display the picture my gamma-correction seems to
> take out around 20% of the blue colour value. So I do perceive the
> yellow less green-ish than you do, probably.

No, you might just percieve it as less blue-ish. Which is a different thing.


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.