[Radiance-general] Uniform sky

[Vera Liu]

Hi Joe,
For the ground truth I'm thinking about just the surface lit by the light
at each pixel without any ray tracing. Basically, the RGB of the surface as
it would be if it were directly lit by the light without any
interreflections or specularities. I figured that a uniform sky would do
the trick.

Best,
Vera


On Sun, May 4, 2014 at 7:08 PM, Joe Smith <the.oat.cracker at gmail.com> wrote:

> Hi, Vera, may I ask what you mean by "ground truth pixel value"?
>
> - JS
>
> Vera Liu <lizzielyh at gmail.com>于2014年5月5日星期一写道：
>
> Hi Radiance experts,
>> I want to get the ground truth pixel values of a scene generated by
>> radiance and I figured the best way is to use a uniform sky where the sky
>> it's 1,1,1...everywhere. The way I'm currently using is by specifying a sun
>> !gensky 4 1 12 +s -a 40 -o 98 -m 105
>> skyfunc glow sky_glow
>> 0
>> 0
>> 4 1 1 1 0
>> sky_glow source sky
>> 0
>> 0
>> 4 0 0 1 180
>>
>> This results in shadows in the final scene. I found that -u option or -c
>> option can give me a uniform cloudy sky and maybe give me the ground truth
>> values. I tried both of them but always get 'no lighting source warning'
>> and a very dark scene when I try to use rpict and pfilt on the .oct
>> generated. I think I might be understanding something wrong. Could you
>> please give me a hint on this? The two options I tried are:
>> !gensky 3 20 12 -a 40 -o 98 -m 105 -u -B 100
>> and
>> !gensky -ang 45 0 -c -b 1
>>
>> Thank you very much!
>> Best,
>> Vera
>>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20140504/95b4b1a5/attachment.html>