Motion Detection Parameters; Detection Zones; Scene Retention; Sensitivity - American Dynamics DuoTect-C AD1562 Installation And Operating Instructions Manual

Scene Retention

Sensitivity

Horizontal/Vertical
Zone 1,2, and 3 Enabled
Zone 1-2 and 2-1 Crossed

View Obstruction

Motion Detection Parameters

Motion detection in the DuoTect-C is controlled by setting
several parameters which establish the criteria for detected
motion in each video channel. These parameters, listed above,
are used in different combinations depending on the current
mode, Dynamic or Guardian.
The following paragraphs define the motion detection
parameters. The pages identified in the above table describe
the setup procedures for these parameters.
A video picture input to the AD1562 is divided into detection
cells within which motion can be detected. (There are 896
cells in the AD1562 NTSCIRS-170 model and 1024 cells in
the AD1562X CCIRPAL model.) These detection cells can
be grouped by the user into patterns called Detection Zones
that cover areas of the video picture. Three separate Detection
Zones can be defined for each channel, with different motion
detection characteristics set for each zone. To provide
optimum motion detection for individual camera scenes, the
pattern (size and shape) of each Detection Zone should be
adjusted for the areas being viewed.
The Scene Retention parameter affects the unit's sensitivity to
slow changes in the scene under surveillance, such as changes
due to the movement of the Sun and its shadows. The range of
settings for Scene Retention is from 1 to 15, where 1 is
maximum retention and 15 is minimum retention. High
settings result in higher sensitivity to slow or infrequent
motion, such as the movement of leaves on a tree. Low
settings result in decreased sensitivity to such movements.
Scene Retention is set in conjunction with Sensitivity, below.
Sensitivitv
The Sensitivity parameter adjusts the motion detection
circuitry of each channel to detect moving objects of varying
speed and contrast. The range of settings for Sensitivity is
from 1 to 15, where 1 is the lowest sensitivity and 15 is the
highest sensitivity. High settings of Sensitivity result in
detection of slow moving objects with very low contrast, while
low settings require greater contrast or speed to cause an
alarm.
.
Motion Detection P-eters
Yes - page 9
Yes - page 10
Yes - page 10
Adjacency Yes - page 10
Yes - page 11
Yes - page 11
No
GUARDIAN MO&
Yes - page 12
Yes - page 13
Yes - page 13
No
No
No
Yes - page 13
The Adjacency parameters specify the number of adjacent cells
that must detect motion in the same video frame. Low settings
of Adjacency result in the unit being more sensitive to smaller
objects. Adjacency is set separately for both horizontal and
vertical movement; an alarm is initiated if adjacent movement
occurs in either direction. The setting range is from 1 to 7
where 1 is minimum (no) adjacency, and 7 is maximum
adjacency (seven adjacent cells must detect motion). If either
direction is set to 1, there is no adjacency in both directions.
The Zone Enabled parameters determine if each Detection
Zone is enabled for standard motion detection. Zone Enabled
is set to either YES or NO for each detection zone. If set to
YES, any motion detected within that zone, in accordance with
the prior detection parameters, initiates an alarm. If set to NO,
standard motion detection is not enabled for that zone. If
either Zone 1 or Zone 2 are set to YES, both Zone Crossed
detection parameters, below, are reset to NO.
l-2 Cross&.& Zone 2-l Crossed
This parameter establishes a direction of motion detection
between zones 1 and 2 for each channel. If "ZONE 1-2
CROSSED" is set to YES, an alarm is activated only if motion
is detected crossing from Zone 1 to Zone 2. The "ZONE 2-l
CROSSED" parameter establishes this criteria in the opposite
direction; if set to YES, there must be motion crossing from
Zone 2 to Zone 1. These parameters are exclusive; if one is set
to YES, the other is reset to NO. Also, if either Zone Border
Crossed parameter is set to YES, both the Zone 1 and Zone 2
Enabled parameters, above, are reset to NO.
View Obstruction
The View Obstruction parameter defines the relative amount of
change in picture content, as compared with a pre-stored
image, which is required for an alarm. There are three settings
for View Obstruction. The LOW setting results in a motion
detection alarm when there is over 50% change in the picture
content from the stored image. The MED setting results in
motion detection when there is over 75% change, and the
HIGH setting results in motion detection only when there is
over 87.5% change in the picture.
5
SETUP