Documentation for C-Werk 2.0.
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For Forensic Search of recorded video to be possible, video must meet the same requirements as those applied to video for detection tools (see Video requirements for scene analytics detection tools).
In addition, the minimum and maximum detectable object speeds in video are related to the camera's frame rate.
The maximum detectable speed depends on the size of the object. The following table shows the relationship between the maximum detectable speed and the frame rate for typical objects (people and cars):
Frame rate
Maximum detectable speed for people
Maximum detectable speed for cars
6 fps
5 km/hr
40 km/hr
12 fps
10 km/hr
85 km/hr
25 fps
20 km/hr
170 km/hr
So if it is necessary, for example, to detect people moving at speeds of up to 10 km/hr, it is sufficient to record at 12 fps.
- The minimum object speed should be such that the object moves at a rate of at least 1 pixel per frame.
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