[Radiance-general] getting irradiance from source defined in photometric units

[Ignacio Munarriz]

Oh Sorry!!, i had mixed the -s and -m parameter in the falsecolor man 
page, the lamp color conversion from cie to rgb will affect the radiance 
output (scaled by the color) , but I don't know how that can be interpreted,
regards, ignacio

Lars O. Grobe escribió:
> Hi Ignacio!
>
> Thanks for the quick reply! Just to avoid misunderstandings, the -s 
> parameter in falsecolor does not change the radiometric values but the 
> scale that is applied to them in the resulting image (as this is a 
> one-way, this does not reallt matter). So with -s, you define the 
> range of pixel values that will mapped to the color scale. The 
> multiplier is given following -m, and the default (to get from 
> radiometric to photometric according to the internal efficacy of 153 
> lm/W that is used by Radiance) is -m 153. So that is why I was 
> wondering whether giving -m 1 would be enough.
>
> My main concern is at the moment whether the HMI-source photometry is 
> correctly transfered into radiometry by only using ies2rad with the 
> lamptab (unfortunately I do not have more detailed information on the 
> emission spectrum and luminous efficacy).
>
> Cheers, Lars.
>
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