Hong Kong officials are studying whether to add AI facial recognition to drones used to enforce a construction-site smoking ban, potentially allowing authorities to identify offenders captured from the air.
The identification capability is not currently deployed. The Labour Department says research and development will take between nine and 12 months, placing any operational use well into the future.
Existing drones carry cameras and infrared sensors. Inspectors can use the thermal equipment to detect temperatures between 60 and 80 degrees Celsius and locate the small heat signature associated with a lit cigarette. Officers can then investigate the area on the ground.
Authorities have issued 39 smoking fines after conducting nearly 1,400 construction-site inspections since the expanded ban took effect in mid-July. They have also issued 11 improvement notices. None of the fines so far resulted from drone detection.
The rules apply to construction sites, including repair, maintenance and renovation work. An individual caught smoking can receive a fixed penalty of HK$3,000, while contractors can face a maximum fine of HK$400,000 for failing to enforce the ban.
The measure followed the deadly Tai Po residential fire in November, which killed 168 people. Authorities have said smoking was the likely cause. Drones are intended to help inspectors cover large or difficult-to-access sites where a ground team may not immediately see a violation.
Adding face matching would expand the system from detection to biometric identification. A drone could first flag activity associated with smoking and then attempt to match a visible face with an identity source. Officials have not yet specified the databases, accuracy thresholds, retention rules or human-review procedures that would apply.
The proposal arrives during a wider expansion of facial recognition in Hong Kong. The city previously announced plans to activate face matching across more than 3,000 CCTV cameras, part of a SmartView network used for public safety and crime investigation.
Hong Kong has also outlined a longer-term goal of 7,000 SmartView cameras. A drone-based tool would add a mobile aerial component to that fixed infrastructure and apply biometric identification to regulatory enforcement outside conventional policing.
The development work will determine whether faces can be captured clearly enough from the air and whether identification can be integrated with the thermal detection workflow. Until that process is complete, officers will continue using drones as a detection aid without automated facial matching.
Sources: Hong Kong Free Press, Hong Kong Government
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By Ali Nassar-Smith
