calculate solid angle and Position index from image

Hi,
How is solid angle calculated from figure and what is the calculation
behind it. Also about position index.
Nithya

Hi, nithya,

The author of evalglare Dr *Jan Wienold* mentioned that there's a "-p"
option to get position index from an hdr image:

example: evalglare -p -c position_index.hdr inputimage.hdr

see the discussion below:
http://www.radiance-online.org/pipermail/radiance-general/2012-April/008532.html

Position Index is explained in Dr Wienold's paper: Daylight glare in offices
http://publica.fraunhofer.de/starweb/servlet.starweb?path=urn.web&search=urn:nbn:de:0011-n-1414579

- Ji

ยทยทยท

On Wed, Dec 11, 2013 at 3:52 PM, nithya merin <[email protected]> wrote:

Hi,
How is solid angle calculated from figure and what is the calculation
behind it. Also about position index.
Nithya

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