[Radiance-general] glare on monitor screen

[erika yuniarti]

Hi Greg,
   
  Thank you for your very quick reply.
   
  I am affraid I cannot understand how to use those files you sent. I am not that advance. I have build a plane as my monitor screen. I dont know how to apply material for this plane. Could you please kindly explain how to apply them in this monitor screen plane?
   
  Many thanks,
   
  Yuni

"Gregory J. Ward" <gregoryjward at gmail.com> wrote:
  Sorry, I should have explained better. L_fore is the luminance of 
the character or whatever it is you are trying to read. L_back is 
the luminance of the surround -- on the monitor, not behind it. 
L_veil is the *additional* luminance caused by unwanted reflection 
off the screen. You may have to render the monitor with it switched 
off to get this value. You can use the attached VDToff.rad file for 
this. You'll also need the other files I've attached, which I forgot 
in the first posting.

-Greg


> From: erika yuniarti 
> Date: July 25, 2006 6:09:08 PM PDT
>
> Hi Greg,
>
> Thank you for your quick reply.
> I see, so I could not use "findglare".
>
> is L_fore the luminance of the monitor screen? is L_back the 
> luminance of the surroundings? So you suggest to compare brightness 
> of the monitor screen against brightness of the surrounding?it that 
> so,what contrast level is acceptable?
>
> However, usually, veiling glare on monitor screen causes very 
> bright portions on the screen that the display on the monitor 
> cannot be seen anymore. Isn't it a brightness comparison between 
> areas on the monitor screen it self (instead of brightness 
> comparison between the screen and the surrounding). Or is it not a 
> matter of brightness comparison, instead it is a matter of too much 
> luminance on the screen that we cannot see clear image anymore? If 
> that so, how to get the luminance values occured on the screen 
> (besides the iso contour and false color, because they dont really 
> show value)?
> Many thanks, Greg.
>
> Best regards,
>
> Yuni
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