Bugs and motion detection at night

Answered

paul chandler

September 22, 2019 19:09

How hard would it be to set different motion duration thresholds (not sensitivity) for night time?

Flying bugs trigger a lot of motion indexing. But they move fast so something like a rule that says motion must have a duration > X milliseconds and > X percent? This rule could be enabled by detecting when the stream has gone to monochrome (typically meaning the IR lights are on). Rain and dust are another matter altogether but getting rid of the bug motion would be a big improvement.

Might be too much overhead to try and pull color data from the stream constantly, but shouldn’t take much to pull a low res jpeg every 60 seconds or so and process that to determine rgb values for color vs monochrome? I don’t know… you figure it out ;-) Maybe you already have and a solution is forthcoming in 4.0, but the above seems like a doable low-tech idea (says the armchair engineer).

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• 

  Norman

  • Network Optix team

  September 23, 2019 08:33

  Hi Paul,

  What you describe are video content analytics and they are available in (some) cameras of:

  1. Axis
  2. Digital Watchdog
  3. Hanwha
  4. Hikvision
  5. VCA Technology
  6. Dahua (from v4.0)

  And as HTTP events in:

  1. Allgovision
  2. Bosch
  3. Milesight
  4. Vivotek 
  5. and many more

  Rain, dust, and snow are tough, even for video content analytics, but there is often a big difference noticeable. 
  If the situation is really critical and the number of false-positive should be reduced as much as possible, thermal cameras with video content analytics are a good choice. 

  Another viable option is the use of IR or laser detectors. For example, the IP models of GJD work just great with Nx Witness. 

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