[Radiance-general] glare on monitor screen

[Gregory J. Ward]

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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: VDToff.rad
Type: application/octet-stream
Size: 299 bytes
Desc: not available
Url : http://radiance-online.org/pipermail/radiance-general/attachments/20060725/cbf20213/VDToff.obj
-------------- next part --------------
A non-text attachment was scrubbed...
Name: VDTscreen_off.rad
Type: application/octet-stream
Size: 309 bytes
Desc: not available
Url : http://radiance-online.org/pipermail/radiance-general/attachments/20060725/cbf20213/VDTscreen_off.obj
-------------- next part --------------
A non-text attachment was scrubbed...
Name: VDT.mat
Type: application/octet-stream
Size: 418 bytes
Desc: not available
Url : http://radiance-online.org/pipermail/radiance-general/attachments/20060725/cbf20213/VDT.obj
-------------- next part --------------

> From: erika yuniarti <erika_yuniarti at yahoo.com>
> 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