Re: was: Brightener in Epson Premium Glossy
Re: was: Brightener in Epson Premium Glossy
- Subject: Re: was: Brightener in Epson Premium Glossy
- From: Graeme Gill <email@hidden>
- Date: Wed, 02 Oct 2002 11:20:13 +1000
Adriano Von Markendorf wrote:
>
Really? I will check this too. When I bought this instrument, the
>
techinical/sales-man (as usual) tell me that was D50. And I'm not sure if I
>
have this information described in my pack (The Avantes folks do not answer
>
to me any email- too bad).
The brochure I got from the local agents shows a graph of "A", D65 and
the spectrocam Xenon. The Xenon and D65 are obviously a close match.
>
> If in fact you have a viewing booth with real D65 spectrum (I don't
>
> know how this would be done economically, and it's hard to know when
>
> real daylight is exactly at 6500K), then, yes, this should
>
> help enormously in accounting for fluorescent whitener effects.
>
>
I think that could understand your point, but you mean that I have a light
>
source that It's NOT pratical or evem efficient for many reasons?
I'm just not aware of there being many real D65 viewing booths
about the place. There's lots that have a D65 white point, but
you need to filter an incandescent lamp very heavily to reproduce
a real D65 spectrum, and that makes them not very practical.
[ Perhaps there are lots of them, I'm just not sure how you'd
make them. ]
>
Could you appoint what instruments did you test?
I'm not sure I quite understand your question, but I used
a spectrocam to measure the spectrum of the light booths.
>
Their claim to have very sophisticated algorithimics to eliminate this
>
effect.
It would be interesting to know how similar it is to the algorithm
I developed.
Graeme Gill.
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