Impath Networks i-Volution iN7000 Pro, User Manual

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Object Tracker
Object tracking is the heart of almost all event detectors. The proper setting of Object Tracker is one of
the most important factors for the accuracy of the results. You should study every single setting carefully
and experiments for tuning the settings to produce the best possible result.
You can create multiple Object Trackers for multiple event detectors. But one tracker can also be shared
by multiple detectors.
Object tracking is computational intensive. If the object tracker setting for 2 event detectors can be the
same, they should share the same tracker. But in some situation, using multiple trackers is more appropri-
ate than sharing one tracker. For example, “illegally stopped object detector” should have its own tracker
because generally its tracker settings should be significantly different from that of other detectors.
Figure 5-43 : Object Tracking
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Object Track Mask Regions
: you should mask the regions that you are not interested in as well as clut-
tering background such as trees and leaves. Always expose only the area of interest. The greater the
area an object tracker has to process, the more CPU resource time it requires.
-
Detection interval:
the interval between any 2 frames for the tracker to process. If objects are moving
slowly, you can set this value higher. However, a value too large can have negative effect on accuracy
while a lower value consumes more computation time.
- Minimum object life duration : this value is the minimum time a moving region has existed to be con-
sidered as an object.
- Object maximum allow motionless time: this value defines when to consider a stopped formerly mov-
ing object to become a background.
-
Luminance Sensitivity
: this value sets the sensitivity of the change in luminance. Please note that this
value should be properly set according to your environment. A high value does NOT necessarily produce
better results.
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iN7000 User Guide