[Radiance-general] findglare: warning -- missing 1% of samples

[Joe Smith]

Thanks, Jan!

I used an interior setting for the test this time as suggested.

However, I still can't get the correct UGR and Guth-VCP output values.

I'm quite confused as there is no such problem on another computer with
Radiance installed (UGR=33.77, Guth_VCP=0.46).

Hope you can kind advise!

The scene files and the batch file of the Radiance commands are shared in
the following link:
https://drive.google.com/folderview?id=0B_FMUh4Urmx4dmhaNi16aVdtTWM&usp=sharing
(need to change Z_cmd.txt to Z_cmd.bat)

I'll try evalglare as suggested later.

Thanks!
Joe

On Fri, Oct 31, 2014 at 1:06 AM, Jan Wienold <jan.wienold at epfl.ch> wrote:

>  findglare cannot resolve the sun in that image, not sure how to overcome
> this. increasing -r doesn't help.
>
> why are you evaluating such a scene with UGR? UGR doesn't make sense for
> very small glare sources and also not for daylight situations.
>
> As far as I know, for exterior spaces no established glare rating exist.
>
> You could use evalglare (version 12) instead and look for the CIE veiling
> glare index (-d option, last index printed), gives you the veiling
> luminance in the eye according to the cie disability glare equation. This
> option is pretty new in evalglare, so if you use it, pls check it against
> hand calculation and report any problem... I checked it only quickly when
> implementing.
> I also wouldn't use DGP for exterior spaces.
>
> good luck
>
> Jan
>
>
> Am 10/30/14, 5:04 PM, schrieb Joe Smith:
>
>    Dear all, I got a warning when using findglare to process a hdr image
> file:
>
> *findglare: warning -- missing 1% of samples*
>
>  And the ugr value produced by glarendx using the .glr file generated in
> the previous step is zero.
>
>  May I ask why the hdr image, which looks fine in Photomatix, is causing
> findglare error?
>
>  The HDR image is shared in the following link:
>
> https://drive.google.com/file/d/0B_FMUh4Urmx4dzZoYVNkSEVzNzQ/view?usp=sharing
>
>  Thanks!
>  Joe
>
>
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>
> --
> Dr.-Ing.  Jan Wienold
> Ecole Polytechnique Fédérale de Lausanne (EPFL)
> EPFL ENAC IA LIPID
> http://people.epfl.ch/jan.wienold
> LE 1 113 (Office)
> Phone    +41 21 69 38041
>
>
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