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*Only use this option if you camera delivers both high and low resolution streams as same picture. If the secondary
stream is a cropped version of the hi-res image, the detection results will be inaccurate.
**This is the minimum time between two detections. If the video stream FPS is low, the actual interval may be
longer.
***This setting teaches the VA engine where to look for the same object in the next frame. Slower option means the
object is present in more frames. Faster means the object is present in less frames during its appearance. Choose
slower options for calm scenes with low-speed objects (e.g., people walking), and faster for dynamic scenes (highway
etc.).
****Highly affects the engine ability to track the objects. If the value is too low for the target scene, different objects
may be considered one. Too high (close to 100) causes each detection to produce a new object each time. We
recommend that you start with the default value, and change it slowly when testing. Scenes with many similar
objects (e.g., items on the conveyor belt) require slightly higher similarity and correct object speed (see above).
ZonesandRules
Finally, set up visual detection elements - zones and lines - and add counters and rules for them.
Click the Configure zones and rules button to bring up the video overlay dialog box. By default, only VA overlays are
displayed, but you can use the Show all checkbox to see if there are other overlays (e.g., data sources) configured for
this channel.
In the top right corner, there are VA markers: counter, counting line, and polygonal zone. Drag and drop any
marker onto the picture to place it, then adjust its size and position.
If you want to see all visual elements of the current channel (channel shortcuts, data sources), click the Show all
option next to the markers. In this way, you can check that the channel shortcuts and data output fields,
if configured, do not overlap with VA elements.
Please note that markers are just visual elements: you need to add rules and then create E&Arules to
trigger some event chains.
Evo Video Analytics 8
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