Short answer: Yes, it actually works — and the difference between Dahua TiOC’s AI motion (called SMD Plus, “Smart Motion Detection”) and ordinary CCTV motion is night-and-day. Ordinary motion triggers on every shadow, possum, branch, and rain band — about 95% of recorded events are noise. TiOC SMD Plus only triggers on humans and vehicles, getting the noise rate to under 5%. The practical impact: instead of 200 useless motion clips per night, you get 3-8 actually-relevant alerts. Mr Secured installs Dahua TiOC across 95% of Brisbane jobs precisely because of this. The marketing is unusually honest.
What “ordinary motion detection” actually does
Old-school CCTV motion uses pixel-difference detection: the camera compares each frame to the previous frame, and if more than X% of pixels changed, it triggers a recording. The math is simple, fast, and runs on cheap hardware. The problem is everything else also changes pixels:
- Shadows shifting as the sun moves — false trigger every 5-10 minutes during the day
- Branches and leaves blowing in wind — false trigger continuously during any breeze
- Rain or hail — entire frame “moves”, triggers continuously
- Insects on the lens — moths at night literally cover the camera
- Possums, cats, dogs, birds — all trigger as if they were people
- Headlights from passing cars — sudden brightness shift triggers
- Auto-iris adjusting between day and night — the camera triggers itself
A typical Brisbane outdoor camera with old-school motion detection produces 150-250 motion clips per 24 hours, of which 5-10 are humans or vehicles. The other 95% is noise. Most homeowners stop checking the alerts within a month.
What Dahua TiOC SMD Plus does instead
Dahua’s TiOC (“Three-in-One Camera”) line runs Dahua’s SMD Plus algorithm onboard the camera itself. Instead of pixel-difference, the camera classifies what it sees using a small neural network trained on:
- Humans — full body, partial body, walking, crouching, climbing, with luggage, with bicycle
- Vehicles — cars, vans, motorbikes, e-scooters, trucks
- Excludes — animals, vegetation movement, water, shadows, weather
If the camera sees motion AND classifies the moving object as human or vehicle, it triggers. If the motion is anything else (cat walking past, branch swaying, rain), it doesn’t.
Real-world Brisbane numbers from Mr Secured’s installed base, sampled across 200+ residential systems:
- Old-school motion: 150-250 events/day, ~95% false
- Dahua TiOC SMD Plus: 5-15 events/day, ~5-10% false
The reduction in noise is so dramatic that customers actually start checking alerts again. That’s the real win — alerts that mean something.
