NETAVIS Observer 4.6 User Manual (October 2015)
Page 87 of 204
8 Working with simple motion detection
Please note
: Since release R1.12 Observer offers powerful video analysis functions with iCAT.
This chapter describes the simple motion detection features that were present before R1.12 and that
are now a part of the iCAT toolbox. Simple motion detection is based on a detection of changed pixels
between video frames while iCAT offers intelligent object detection and tracking. For more details on
iCAT refer to
15 Video analytics with iCAT
on page 140.
Observer offers two mechanisms for simple motion detection:
Observer’s own server-based motion detection
: The images are analyzed by the Observer
server. The advantage of this method is that it works with any camera, even old cameras. The
disadvantage might be that if there are many cameras that transfer their images to the server
for analysis, the bandwidth of the network could be burdened and also the server could be
overloaded.
In-camera motion detection
: The images are analyzed in the camera and only when
detection occurs, an event and image data are sent to the Observer server that then stores the
event and the images in its archive. The advantage of this method is that the network and the
server are not burdened. The disadvantage is that it works only with special cameras, that offer
this feature and that the motion detection settings have to be programmed in the camera
directly.
8.1 Observer’s own server-based motion detection
The simple motion detection feature of Observer can recognize motion by detecting pixel changes
between video frames. Such a detection can then trigger the following predefined actions:
Entry of events in an Event list (optionally accompanied by an acoustic signal).
Changes in recording behavior (e.g. higher recording rate) if that has been programmed (see
7
Working with archive recordings
on page 71).
Here you find the steps how to configure the parameters for simple motion detection.
8.1.1 Preparation
Before you begin to configure a motion detection definition, be sure that you have the necessary
authorization to make settings. If you are not sure, please ask your Observer administrator.
Please note
: Motion detection for PTZ cameras is problematic since normal movement of the camera
will trigger a motion detection event.
8.1.2 Basic configuration of server-based motion detection
If you are not already running the Observer client application, open your Internet Explorer and log in to
your Observer server and your Observer system.
1.
Choose
Video analysis (iCAT)
from the
System administration
menu. This opens the
Video
analysis (iCAT)
dialog.
