[argyllcms] Re: Spectral illuminant sample
- From: Roger Breton <graxx@xxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 16 Feb 2008 15:08:55 -0500
Marco,
You have the spectrum values in the CXF file :
> <Spectrum Conditions="1">
>
> <Created>2006-09-06/10:15:32</Created>
> <Modified>2006-09-06/10:15:32</Modified>
> <Value Name="380">0.0549282</Value>
> <Value Name="390">0.0581962</Value>
> <Value Name="400">0.0609521</Value>
> <Value Name="410">0.0622062</Value>
> <Value Name="420">0.0620531</Value>
> <Value Name="430">0.061716</Value>
...
> <Value Name="560">0.0900136</Value>
...
> <Value Name="710">0.191601</Value>
> <Value Name="720">0.200459</Value>
> <Value Name="730">0.213745</Value>
I think you have to make sure the values are normalized to 100 at 560nm. In
the example above, the value at 560 is 0.0900136. What would you multiply
this value to yield 100? Answer = 100/0.0900136 = 1110.943235. So, every
value in the CXF spectrum has to be 'scaled' by 1110 so that they are
expressed on a 100 scale. I think this is what Argyll is using.
Try that.
> I have already tried yesterday to change the number in a .sp file that
> were near to the txt GMB file but without success.
> The only solution is to wait the conversion utility
>
>> In the CXF, make sure that the light is normalized at 560nm or
>> 560nm = 100.00
>
> I don't understood this words. In the txt file there is no reference
> at all.
>
> Marco
Roger Breton
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