Bosch LTC 1462/21 Reference Manual page 41

2X-Dynamic
The 2X-Dynamic uses dual sensor
exposure. In harsh lighting conditions
pixels from each exposure are mixed
to give a more detailed image.
15-Bit technology
A method of more accurate and
sophisticated video processing.
Angle of View
The measure of the area within the
scene that is visible. The larger the
focal length, the smaller the angle
of view. The smaller the focal length,
the wider the angle of view.
Aperture
The size of the opening in the iris
controlling the amount of light reaching
the sensor. The larger the F-Stop
number the less light.
Automatic Gain Control
The electronics that regulates the
gain or amplification of the signal.
Auto Iris Lens
A lens that automatically opens or
closes the aperture in order to maintain
proper light levels. With direct drive or
DC Iris lenses the camera controls the
size of the aperture. Video iris lenses
have the control circuits built into the
lens.
Camera Reference Guide
AutoBlack
Auto Black Compensation is a technique
of boosting the video signal level to
produce a full amplitude video signal
even when the scene contrast is less
than the full range. The darkest part of
the signal is set to black and the lightest
part to white, thus increasing the
contrast.
Auto White Balance
A feature that allows a color camera
to automatically adjust its output color
to give a natural colour independent of
the lighting used.
Attenuation
A signal loss or decrease.
Back Focus
The distance between the image plane
and the rear most portion of the lens.
Back Light Compensation
BLC selectively amplifies parts of the
image to compensate for large contrast
differences when part of the image
is very brightly lit e.g. person in sunlit
doorway.
Cable Compensation
prevents image quality degradation
caused by signal losses from long
cable lengths.
41