Datacolor User to User Support Group.

>>What is L Star curve mean exactly?

Its a different way to define the ramp from black to white. Instead of 
following a simply mathematical gamma curve, its tries to more 
accurately imitate the luminance response of the human eye by using a 
more complex curve, based on the L* ramp, such as in L*a*b*...

C. David Tobie
Product Technology Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com

-----Original Message-----
From: Jan Barkan <jbarkan@...>
To: colorvision_group@yahoogroups.com
Sent: Fri, 19 Oct 2007 8:33 am
Subject: Re: [SPAM]  Re: [colorvision_group] Re: Initial info on the 
new Spyder3 line of products

















What is L Star curve mean
exactly?

  ----- Original Message -----
  From:
  CDTobie@...

  To: colorvision_group@yahoogroups.com

  Sent: Friday, October 19, 2007 7:27
  AM
  Subject: [SPAM] Re: [colorvision_group]
  Re: Initial info on the new Spyder3 line of products



  >>I assume you are referring to curve-creation ability in
  Spyder2PRO.

No, I was referring to importing a curve, not creating
  one...

>>Could you provide a good L-Star curve
  preset?

Yes, Spyder3Elite does exactly that...

I'm sure it would
  be appreciaged
by some of
the current PFP + Spyder2 users.

Sorry,
  we aren't building new features into the older products. We have
just
  recently licensed L-Star, and are adding into our new line of

products.

C. David Tobie
Product Technology
  Manager
ColorVision, Inc.
CDTobie@...
www.colorvision.com

-----Original
  Message-----
From: marko.mili <marko.mili@...>
To:
  colorvision_group@yahoogroups.com
Sent:
  Thu, 18 Oct 2007 5:58 am
Subject: [colorvision_group] Re: Initial info
  on the new Spyder3 line
of products

--- In colorvision_group@yahoogroups.com,
  CDTobie@... wrote:
> Actually you can load any tone response curve into
  Spyder2PRO,
> including L-Star, if you have a copy of it. Its just built
  in with
> Spyder3Elite, so that its an internal choice, not something
  that
> requires an external curve.

David,

I assume you are
  referring to curve-creation ability in Spyder2PRO. Do
you
  think
9-point
curve is adequate to effectively describe L-Star? What
  better tool can
be used
to create more
fitted curve - it appears
  that documents in Curve folder are a
variation on .icc
files. Can
  these
files only contain curves with points or can you read parametric
  curves
like in
ICC v4?

Could you provide a good L-Star curve
  preset? I'm sure it would be
appreciaged
by some of
the current PFP
  + Spyder2 users.

Cheers.

Yahoo! Groups
  Links

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