COVID-19: Stay Vigilant With Group Size Checker

In tandem with the rise in COVID-19 cases in the community, the Singapore Government has been progressively tightening restrictions on the group sizes of social gatherings. Group size limits were reduced from 8 to 5 on May 8 (reversion to Phase 2), and further from 5 to 2 on May 16 (Phase 2 – Heightened Alert). The CV Hub team at AI Singapore has developed the Group Size Checker tool since the start of the pandemic. The tool is able to read in live video feeds or recorded videos and check if the group size limit has been violated.

Recognising that COVID-19 will be with us for some time to come, with periodic tightening and loosening of social gathering limits, the team made sure that the “group size limit” can be easily configured according to the requirement of the day.

For example, the animated GIF below shows a detection when the group size limit is set at 5, while the second shows a detection at a group size limit of 2. The tool was developed to be flexible, and can be adapted to trigger further actions, such as taking a snapshot of the detection, or sending an alert to an API.

Group limit of 5, using pose estimation.
Group limit of 2, using object detection.

If you are interested in the Group Size Checker to check group sizes for social gatherings, do contact us at Until then, stay safe and stay vigilant!

Note : All photo/GIFs were taken before the reversion to Phase 2 on May 8, 2021.