The outbreak of the coronavirus disease 2019 (COVID-19) created a global health crisis that has had a huge impact on the way we perceive our world and our everyday lives. The spread of COVID-19 has threatened our plans and the workplace safety measures put in place to contain the spread of the virus have required social distancing going forward.
As state governments and businesses prepare to restart the economy, the consensus is that as the U.S. gradually re-opens, the look and feel of businesses will change considerably. Before the world can return to its pre-COVID-19 normal, this interim period between the lifting of shelter in place orders and the distribution of vaccines or effective treatments is projected by experts to last at least one or possibly even two years.
“The technique is a “cornerstone” of preventative medicine, says Dr. Laura Breeher, medical director of occupational health services at the Mayo Clinic. “Contact tracing, it’s having a moment of glory right now with COVID because of the crucial importance of identifying those individuals who have been exposed quickly and isolating or quarantining them,”
– Dr. Laura Breeher, Medical Director of Occupational Health Services at the Mayo Clinic.
CheckVideo has launched a new feature called Contact Search that can search video of people in close proximity so you can identify those who have been in contact with an individual. Without contact tracing, the only option to ensure employee safety is a full shutdown and quarantine for everyone on premise. Rapid identification of possibly affected individuals is most important for their safety and for continued operations.
Most cameras have some form of motion detection or video analytics built-in, and they work by looking for pixel changes in specific parts of the view. AI can analyze these pixel changes and find the pixels corresponding to people. This is based on training the AI with hundreds of thousands of images of people in different camera views and lighting conditions.
The movement of people in view of the camera is then analyzed frame by frame. If multiple people are found in the camera view, it further qualifies it to look for appropriate distancing. While passing by a person is unlikely to spread COVID-19, being in close proximity for a period of time can increase the risk of infection and jeopardize employee safety. Therefore, the AI must look for patterns of people converging and staying in proximity for a period of time, or interacting in some manner.
We looked for incidents of possible contact over 9 hours of video. Advanced Analytics with Person Classification finds segments with people in view, cutting it down to 347 events. That can be reviewed in 3,470 seconds or 58 minutes. We improved our algorithms to look for more than one person in view. Looking for “Multiple People” cuts this down to 15 incidents. This can be reviewed in 2 minutes. We further look for people that are close to one another for a period of time. Looking for “Person Contact” cuts this down to 3 incidents. This can be reviewed in 30 seconds. Contact search saved hours of time watching video and this can be done remotely, using a web browser, with existing cameras! Watch the videos to see it in action.
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