[Radiance-general] illuminance measurement

[John Ford]

Hi,

I'm trying to confirm illuminance calculations but getting conflicting  
results. A falsecolor image generated from an irradiance image (-i  
option to rpict: rif file has line 'render= -i') gives an illuminance  
of around 400 lux in the middle of the room. Using rtrace I get an  
illuminance of about 210 lux in the middle of the room. (I'm using an  
irradiance image for the -i option in falsecolor and a radiance image  
for the -p option).

The rtrace I'm using is as per Axel Jacobs tutorial: echo "61.292  
27.490 0 0 0 1' | rtrace -I -h -ov octrees/south.oct | rcalc -e  
'$1=179*$1' This should work with the octree- same as what I generated  
the image from-  should it not?

John.




JOHN FORD

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JOHNFORD at BB3.NET.AU
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