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<TITLE>sane-devel: Highlight/Shadow Values for negative scanning</TITLE>
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<H1>Highlight/Shadow Values for negative scanning</H1>
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<STRONG>From:</STRONG> Oliver Rauch (<A HREF="mailto:oliver.rauch@rauch-domain.de?Subject=Re:%20Highlight/Shadow%20Values%20for%20negative%20scanning&In-Reply-To=&lt;3B35A9FC.7E6F9114@rauch-domain.de&gt;"><EM>oliver.rauch@rauch-domain.de</EM></A>)<BR>
<STRONG>Date:</STRONG> Sun Jun 24 2001 - 01:51:08 PDT
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Hello.
<BR>
<P>I found out some Values that are interesting for scanning negatives
<BR>
when your scanner uses analog highlight and shadow functions
<BR>
(e.g. umax Powerlook III).
<BR>
<P>The values are defined for a range 0% - to 100% where this
<BR>
range does cover the full intensity range:
<BR>
<P><P>Negative ---- highlight ---- ------ shadow ------
<BR>
Type red green blue red green blue
<BR>
---------------------------------------------------------------
<BR>
standard 66% 33% 16% 7% 1% 0%
<BR>
---------------------------------------------------------------
<BR>
fuji 64% 33% 16% 7% 1% 0%
<BR>
---------------------------------------------------------------
<BR>
kodak 54% 18% 12% 9% 2% 0%
<BR>
---------------------------------------------------------------
<BR>
konica 38% 21% 14% 3% 0% 0%
<BR>
---------------------------------------------------------------
<BR>
agfa 61% 24% 13% 6% 2% 0%
<BR>
---------------------------------------------------------------
<BR>
<P>The values are not exact but they are a good starting position.
<BR>
<P>When only one highlight/shadow value for gray/intensity is available
<BR>
you should use the maximum (normally red) value of the highlight list
<BR>
and the minimum value (normally blue=0%) of the shadow list.
<BR>
<P>I hope some people can take advance of this.
<BR>
<P>Bye
<BR>
Oliver
<BR>
<P><PRE>
--
Homepage: <A HREF="http://www.rauch-domain.de">http://www.rauch-domain.de</A>
sane-umax: <A HREF="http://www.rauch-domain.de/sane-umax">http://www.rauch-domain.de/sane-umax</A>
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E-Mail: mailto:<A HREF="mailto:Oliver.Rauch@rauch-domain.de?Subject=Re:%20Highlight/Shadow%20Values%20for%20negative%20scanning&In-Reply-To=&lt;3B35A9FC.7E6F9114@rauch-domain.de&gt;">Oliver.Rauch@rauch-domain.de</A>
<P>--
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