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102 en | Glossary of CCTV Terms VG4 AutoDome Modular Camera System
F.01U.089.433 | 4.0 | 2008.09 User’s Manual Bosch Security Systems, Inc.
V
Virtual Masking A unique Bosch technology that allows for the creation of “invisible” motion masking areas.
These invisible masks are similar to privacy zones, but only the AutoDome’s AutoTrack II and
Video Motion Detection algorithms can see them. This allows the AutoDome to ignore areas of
unwanted motion.
Video Motion Detection
An algorithm for motion detection in which the camera compares the current image with a
reference image and counts the number of pixels (see Pixel) that have changed between the
two images. An alarm is generated when the number of pixel changes exceeds a user-
configured threshold.
VMD See Video Motion Detection.
X
XF-Dynamic A highly accurate 15-bit digital signal processing technology from Bosch that extends the
dynamic range of Dinion
XF
cameras to optimally capture the detail in both the high and low
light areas of the scene simultaneously, maximizing the information visible in the picture.
Z
Zoom Changing the effective focal length to allow different fields of view to fill the picture area.
Zoom can be optical, where the lens is adjusted, or digital, where a portion of the view
selected is magnified electronically.