Jadak PHOTO RESEARCH SpectraScan PR-655, Руководство пользователя

Страница: 77 / 160

PR-655/670 User Manual
61
In this example, Delta E has been selected in the Measurement Mode setup screen. The
displayed values of x, y, u’, v’, u, v, CCT, mk -1, and dev are the measured values of the sample.
RGB D
ISPLAY
C
AL
(S
TANDARD ON
PR-670, O
PTIONAL ON
PR-655)
The PR-650 R G B measurement mode is designed to provide the user with a convenient, spectrally based
interactive method of performing white point calibrations of CRT’s, LCD’s PDP’s and digital projectors or any
other display technology that features adjustable RGB channels.
During use, the user is presented with a bar graph and numerical levels indicating the deviation amplitude and
direction of the three
R G B primaries from the target settings. Once the RGB levels of the display are adjusted to
the target values set by the R G B algorithm, the white point is properly adjusted.
Since the PR-655 and PR-670 are spectrally based systems, color matching can be achieved without having a
“golden sample” available as a reference. White point calibrations can be based on user enter ed target values
including luminance and CIE chromaticity coordinates (CIE 1931 x, y values). The user can also select pre-stored
phosphor sets (NTSC, EBU, CIE, HDTV and SMPTE) or create user phosphor values through measurement or data
entry.
S
ETTING UP
RGB M
EASUREMENTS
Prior to making R G B measurements, the proper parameters must be entered into the R G B setup menu to insure
correct results.
FIGURE 55 - RGB DISPLAY CAL SETUP SCREEN