Bosch 100 Series Panduan Referensi - Halaman 45
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Sensitivity
A measure of the incident light required
to give a standard video signal. It's value
is given in lux or foot-candles.
Signal to Noise Ratio
The ratio between a useful video signal
and unwanted noise. It is measured in
dB.
Slow shutter
An alternative for increasing camera
sensitivity.
SmartBLC
The backlight compensation window
and weighting factor are automatically
defined. The camera dynamically adjusts
these for changing light conditions.
Spot Filter
A graduated filter in a lens used in a lens
to increase the f-stop range of the lens.
Synchronization
Electronic pulses that are inserted into
the video signal in order to assemble
the picture correctly.
Vari focal Lens
A lens where the focal length to be used
can be set manually.
Tri-streaming
Generates two separate MPEG-4 video
streams and one MJPEG stream
simultaneously. This advanced
tristreaming capability enables the
user to tune live viewing and recording
Camera Reference Guide
requirements to meet specific site
and enterprise needs.
Video Motion Detector
A device that analyses the video
signal from a camera to determine
if there is movement within the picture.
Video Iris Lens
See auto-iris lens.
WDR (Wide Dynamic Range)
The dynamic range is the difference
between the minimum and maximum
acceptable signal levels. A scene with
both very low and very high illumination
levels requires a camera with a wide
dynamic range to handle it correctly
and produce a useful image.
XF Dynamic
Extends the dynamic range of the
Dinion
cameras to produce exceptional
XF
images even in high contrast lighting
conditions.
Zoom Lens
A lens with the ability to adjust the focal
length from wide angle to telephoto
with minimum focus shift.
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