Re: L* to Density equation
Re: L* to Density equation
- Subject: Re: L* to Density equation
- From: Phil Green <email@hidden>
- Date: Fri, 29 Jun 2001 17:51:37 +0100
- Organization: LCP
Joel wrote:
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>From: matt louis <email@hidden>
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>Does anyone know an equation to calculate L* to StatusT density?
Unfortunately there isn't one. You can calculate colorimetric density
(first find Yo and Y, where Yo is the Y of the paper, than calculate
log(Yo/Y)). But you'd need to know the spectral reflectance in order to
calculate Status T density accurately. You can estimate it from X,Y and
Z (or L*, a* and b*), but it's not as accurate.
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ColorMouseTrap software from ColorSavvy (sold with the ColorMouse
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Colorimeters and Spectrophotometers) lets you toggle back and forth.
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Nice feature. But I haven't seen any published equations. Would be
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helpful if I could remember Phil Green's website too. There's a link
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to everything scientific about color there.
See below!
--
Phil Green
Colour Imaging Group
School of Printing and Publishing
LCP
Elephant and Castle, London SE1 6SB
Tel: +44 020 7514 6759 Fax: +44 020 7514 6772
http://twinpentium.lcp.linst.ac.uk/digitalcolor/