- CRT Color Analyzers for the
industrial market
- Color Sensor operates directly with
standard RS-232C serial port
- Interfaces to software for
automatic adjustments. Basic, C and Pascal source codes provided
- Accepts any field rate - including
pc monitors and HDTV
- Displays xy, u'v', XYZ, color
difference and correlated color temperature
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For users who wish to used double
sensor setups, the software may operate two measuring heads at the same time and
present simultaneous displays on the PC.
Modes of Display
The color sensor operates with CIE
1931 standard Observer response filters, thus making it possible to display
absolute color coordinates.
-
xyY mode:
x and y coordinates are plotted in the central portion of the CIE 1931
diagram, and the x,y,Y (luminance values) and the color error (CIELUV) are
displayed in numerical form together with the correlated color
temperature. The reference point is shown as a box and the actual color is
shown as a cross.
The color error is calculated as the difference between the selected
color reference and the actual color according to the CIE 1976 L*u*v* (CIELUV)
color space definition.
-
d
x
d
yY
mode:
The
d
x and
d
y
differences are plotted in a coordinate system with origin at the white
reference point. The white reference, the x and y values, and the luminance
value Y are shown in numerical form. The error is shown as a vector (
d
x,
d
y).
-
u'v'Y mode:
-
The u' and v' (also called u*
and v*) coordinates are plotted in the central portion of the CIE 1976
diagram. The u', v', Y (luminance value), and the color error (CIELUV) are
shown in numerical form. The reference point is shown as a box and the
actual color is shown as a cross.
-
d
u'
d
v'Y
mode:
The
d
u' and
d
v'
differences are plotted in a coordinate system with origin at the white
reference point. The white reference, the
d
u'
and the
d
v'
values and the luminance value Y are shown in numerical form. The error is
shown as a vector (
d
u',
d
v').
-
uvY mode:
u and v coordinates are plotted in the central portion of the CIE 1960
diagram. The u, v, Y (luminance value) and the color error (CIELUV or JND)
are shown numerically. The reference point is shown as a box and the actual
color is shown as a cross.
-
d
u
d
vY
mode:
The
d
u and
d
v
difference are plotted in a coordinate system with origin at the white
reference point. The white reference, the
d
u
and the
d
v
values, and the luminance value Y are shown in numerical form. The error is
shown as a vector (
d
u,
d
v).
-
XYZ mode:
The CIE 1931 XYZ values are shown as bar graphs. The values are the direct
output from the CIE standard observer response filters normalized to the
selected white reference. The display is the same as an RGB display phosphor
compensation.
-
RGB mode:
Red, green, and blue value are shown as colored bar graphs. The color
balance is relative to a selected white reference and phosphor. The display
reference may be either one of the red, green, or blue inputs, or the
luminance or a previous measurement. The phosphor compensation removes the
"crosstalk" (specified by the CIE standard observer response
curves) between the red gun and the blue and green bars (and the same for
the other possibilities).
-
RGB fixed level mode:
This display is the same as the RGB display except that, in addition to the
normalization to a white reference and phosphor, the display is also
normalized to a pre-selected fixed luminance value.
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