[Radiance-general] RE : Pixel to solid angle transformation

[Marija Velickovic]

Hi,

Thanks Raphael and Ji.

S(n) function is definitely what I needed.

Now I 'just' need to analyze C code to see how calculation is exactly done.

Thanks again,
Marija.

On Thu, Feb 14, 2013 at 8:13 AM, Ji Zhang <hope.zh at gmail.com> wrote:

> Hi, Marija, some recent discussions on "*solid angle as represented by
> each pixel* in an image produced by Radiance" from Lars and Giulio in the
> following thread may also be helpful:
>
>
> http://radiance-online.org/pipermail/radiance-general/2012-October/008984.html
>
> - Ji
>
>
>
> On Wed, Feb 13, 2013 at 11:43 PM, Compagnon Raphaël <
> Raphael.Compagnon at hefr.ch> wrote:
>
>> Maybe this can help you:
>>
>> you can use the pcomb program to obtain the solid angle of each pixel of
>> a picture!
>>
>> for instance this will translate a radiance picture (origin.pic)  into a
>> "solid angle" picture (solid_angle.pic) where each pixel has a brightness
>> value that matches the solid angle of the same pixel in the original
>> picture:
>>
>> pcomb -e 'lo=S(1)' origin.pic >solid_angle.pic
>>
>>
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