Re: CM2S density application on MAC
Re: CM2S density application on MAC
- Subject: Re: CM2S density application on MAC
- From: Joel <email@hidden>
- Date: Mon, 22 Jan 2001 11:57:54 -0600
Hi Chris,
Thanks for the nitty gritty. I forwarded my inquiry to the Csync
because I know there are a number of CM2s lurkers who find this stuff
ABsolutely fascinating...
Anyway, I was hoping the DensityAPP on the MAC would give me a quick,
easy d-read while comparing linearization tables from one device to
another. I've been using the ColorMouseTrap and am aware of the
CIELAB tool options, but am also a bit confused: we have a
transmissive densitometer we use for measuring film density. On this
device I get a dMax from a referenced zero (dMin) I can understand.
Example: film density calibrated zero to a dMax 3.9.
The CM2s is reflective and (forgive my technical ignorance here) I
don't know what "status T" is. On a ink limit test black swatch 100%
I get: .99 1.02 1.04 1.02 Density T. Four readings for one density?
Any idea what this is relative to. Is there a doc anywhere which
describes the purpose of four readings on the table?
Thanks for your help...and I promise I won't bug you too much.
Hello Joel,
You can get the density information from ColorMouseTrap.
The DensityApp was written for people with CM2Cs or CM2Ds who want to see
density values. Most of our customers use the instruments in conjunction
with RIPs or profiling packages. It's a rare case when someone uses a
ColorMouse as a general purpose instrument. But it's for those cases that
we built ColorMouseTrap and the DensityApp.
To get density values from a CM2S you launch ColorMouseTrap, then from
ColorMouseTrap go to the "CIEValues". Set one of the columns to the
desired density, and with CIEValues in the foreground make your
measurements.
Here's the technical nitty-gritty.
A ColorMouse is an LED based color measurement tool that contains 16
LEDs. It also contains a "profile" that describes how to convert between
the instrument's measurements to useful data like Spectral values, XYZ,
or Density.
A CM2D and CM2C contains 8 unique LEDs.
A CM2S contains 16 unique LEDs.
A CM2D contains 4 profiles, one each for Status densities. (The unit is
optimized for Status T density).
A CM2C contains 24 profiles, 20 for XYZs, 10 illuminants with 2 observers
(2 and 10 degree), and 4 for status densities. (The unit is optimized for
XYZ D50 2-degree observer as well as status T).
A CM2S contains 1 profile for spectral reflectance.
DensityApp wants to set the instrument in "Density Mode". CM2Cs and CM2Ds
have such a mode but the CM2S does not. An application that uses a CM2S
must calculate the density value from the spectral values. (This is why
several of the RIPs do NOT support the CM2S. They do not want to perform
the spectral integration necessary to calculate density. It's not a hard
calculation, but it's one more piece of code they would rather not have
to implement. The driver really should do this so it's not entierly their
fault.)
If you have a Windows machine, it's a little bit easier to get measured
values. We have a Windows application called CS-Connect which is strictly
designed for data collection. It allows you to measure directly into
Excel or other applications. It supports all Color Savvy devices and can
calculate a variety of color values from the CM2S. This application is
available for download from our web site. You can go directly to the
download area using this URL:
<http://www.colorsavvy.com/TechSupport/TechSupport.htm/> (thus bypassing
our frames from our home page.)
Please let me know if this helps. If you need any other assistance please
do not hesitate to ask.
Savvy Regards,
Chris
---------------------------
Chris Pearson
Color Savvy Systems Limited
724 Pleasant Valley Road
Springboro, OH 45066
Voice: 513-743-7100 x103
FAX: 513-743-7101
email@hidden
http://www.colorsavvy.com