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Am 14.09.2016 um 16:09 schrieb Bald Eagle:
> clipka <ano### [at] anonymous org> wrote:
> The
>> pigment is also used in the other finish features, which are related to
>> reflection of light from somewhere else, where values above 1 make no
>> physical sense.
>
> Does that include fluorescence, such as the widespread use of optical
> brighteners in laundry detergents and printer paper?
>
> (I'm not trying to claim that the actual reflected light intensity would exceed
> the incident light in practice, in those two examples, but in theory I suppose
> it might be possible?
Even with fluorescence, technically values above 1 make no sense. But to
model this, colours would have to be matrices rather than vectors, and
one of the channels will be UV light, which doesn't show up in the image.
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