[Radiance-general] Luminance predictions in a plane

[sokol dervishi]

Dear all, 

I have a question regarding the luminance prediction (cd/m2) on the plane for certain points. and any help would really be appreciated.

I have measured  certain points with an luminance meter. I have used also image-based for the same points to extract the luminance and I have very similar results. I need to use also simulation-based luminance values for the same points and compare the results with the measured and image based ones. 

Before,  I have simulated only Illuminances. How can I measure the Luminances?

Here is the code I use to predict the illuminance:

# commands to run
commands = ["rm -f /tmp/bpi.amb",
            "oconv env.rad lab_surfaces_corrected_moved.rad lab_windows_and_doors.rad strato_sokol2.rad> lab.oct", 

"echo '4.52    0.85 0.74 0 0 1 " +
        "3.74    1.13 0.74 0 0 1 " +    
        "4.52    1.13 0.74 0 0 1 " +          
        "5.30    1.13 0.74 0 0 1 " +
        "3.74    2.13 0.74 0 0 1 " +    
        "4.52    2.13 0.74 0 0 1 " +    
        "5.30    2.13 0.74 0 0 1 " +    
        "3.74    3.13 0.74 0 0 1 " +    
        "4.52    3.13 0.74 0 0 1 " +    
        "5.30    3.13 0.74 0 0 1 " +    
        

            "' | rtrace -w -af /tmp/bpi.amb -as 512 -ar 64 -aa 0.15 -ab 2 -I+ -h lab.oct | rcalc -e '$1=($1*0.265+$2*0.670+$3*0.065)* 179'",

   
            ]


Any help would be really appreciated, 

Thank you very much

Best regards, 

Sokol Dervishi 

       
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