GE Interlogix KTC-510, Руководство пользователя

Страница: 9 / 16

KTC-510/515/540C/810C/815C/840CE Setup
1041080A / March 2003 9
1.1.1 W
HITE
B
ALANCE
(ATW/AWB)
ATW mode (default)
In the ATW mode, the color temperature is being monitored
continuously, and the white balance is set automatically by an internal
micro-controller. The operating color temperature range is
from 2500 to 9500 K.
AWB mode
When the switch is set to AWB (conventional white balance), a camera
using white as its reference automatically adjusts the content of blue and
red in the picture, depending on the scene, to provide a picture with
balanced color content. If the color temperature of the scene is
continuously changing, the camera can lose its color reference; in this
case, switch the camera to ATW.
1.1.2 B
ACKLIGHT
C
OMPENSATION
(BLC ON)
This auto BLC is a digital light-level control system. It is activated
automatically by screen histogram (contrast) and 225-area window
weighting integration. This controls iris gain and white balance
simultaneously so that a clear object with adequate light level can be
optimized.
Central Window Weighted Average Backlight Compensation
This method is ideal when the main subject is fixed within the screen.
Histogram Backlight Compensation
This method is ideal when the main subject moves within the screen.
The combination of two types of backlighting makes it easier to arrange
backlight compensation operation to match the imaging conditions and
installation location.
Note: Compensation might be insufficient when the background is extremely bright.
1.1.3 G
AMMA
C
ORRECTION
(r = .45 / r = 1)
Gamma correction is an electronic correction within the camera circuitry
that matches the brightness level seen by the camera with the brightness
level displayed on the monitor. This adjustment enables the monitor to
display the correct level of contrast. The standard setting is .45 (default).
The manual switch should be used only if the controls on the monitor are
not giving sufficient adjustment.