Impath Networks i-Volution iN7000 Pro, Руководство пользователя

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Figure 5-44 : Object Tracking Parameters
-
Object maximum allow hidden time
: this value sets the maximum time that an object disappears (e.g.
hide behind a building or tree). If an object has disappeared for this time, it is considered immobile.
- Hidden-object life-time threshold : object tracker can remember objects that disappear. This value is
the maximum time and object will be remembered.
-
Object must be moving initially
: “Moving” is a key to determine the boundary of an object and where it
is. In most cases, an object is considered ‘an object’ after it has been moving for some time. However, in
some cases, such as person dropping a briefcase on the ground the object appears suddenly doesn’t
move. If you are encountering these situations, you should uncheck this box.
-
Show Track Result
: enable for showing tracking result (trajectory, boundary of objects, etc) on the pre-
viewed video.
Figure 5-45 : Object Tracking Object Attributes
- Object Size(s) : this setting identifies the expect sizes of the objects of interest. Correct could signific-
antly improve accuracy. You can add just the sizes of objects of interest and ignored others. For example,
if you just want to track a vehicle but not a truck, you should add the possible sizes of the vehicle. Initially
the video content analysis module cannot classify objects into real things, such as car, bike, or pedestrian
(we will do this later by adding models of real things). However, defining sizes of objects is an interim
method to classify real objects.
-
Size Variance
: you may set variance of the defined object sizes.
-
Object moving speed
: this value sets the speed of moving objects to be tracked. For example, if the
objects you are interested are pedestrian, you may set this to “slow”. If you are interested in vehicle, you
should set this to “fast”.
It is difficult to pre-define all possible combinations for each single setting. The basic
concepts require experimentation to determine how settings influence the results and to
select those that best meet your requirements.
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iN7000 User Guide