Is social distancing Important?
According to world health organization,
Maintain at least 6 feet distance between yourself and others. Why? When someone coughs, sneezes, or speaks they spray small liquid droplets from their nose or mouth which may contain virus. If you are too close, you can breathe in the droplets, including the COVID-19 virus if the person has the disease.
Avoid going to crowded places. Why? Where people come together in crowds, you are more likely to come into close contact with someone that has COIVD-19 and it is more difficult to maintain physical distance.
What is social distancing?
Social distancing, also called "physical distancing," means keeping space between yourself and other people outside of your home to control the spread of contagious diseases (such as coronavirus).
To practice social or physical distancing:
Stay at least 6 feet (about 2 arms' length) from other people
Do not gather in groups
Stay out of crowded places and avoid mass gatherings
In addition to everyday steps to prevent COVID-19, keeping space between you and others is one of the best tools we have to avoid being exposed to this virus and slowing its spread locally and across the country and world.
Conclusion time!! Social distancing is arguably the most effective non pharmaceutical way to prevent the spread of a disease — by definition, if people are not close together, they cannot spread germs!
But how we can leverage "AI" to achieve this?
The AI can be used by humanitarian and law enforcement processionals to gauge whether people are abiding by public health guidance. An AI system can keep a lookout for objects at the same standard (or better) when compared to a human. With that being said, using technology to perform surveillance is much more efficient. Surveillance is a repetitive and mundane task. This may cause performance dips for us human beings. By letting technology do the surveillance, we could focus on taking action if something goes amiss. To survey a large strip of land, you need lots of personnel. Stationary cameras also have a limited range of view. With mobile surveillance bots (such as micro drones) these problems can be mitigate.
Space Planning & Optimization:
This technology can help small crowd gathering platforms such as restaurants and medium sized offices, to help maintain a comfortable number of customers or employees within their enclosed spaces. Its utility could be expanded to design a social distancing friendly seating arrangement plan so as to utilize the maximum space offered within the enclosures and help track if the crowd conforms to the said seating plan without any violations.
Traffic influx control (Density Management):
For high density enclosures with constant influx and exit of people such as metro platforms, malls, museums, etc; a population density tracker can be maintained that records the average distance amongst the crowd and generates an alert to the officials every time the average distance violates a particular threshold. This achieves the goal of controlling the inflow of people at the very entry itself and still manages to keep a healthy density of crowd within the public gathering platform, without raising any safety concerns.
Detecting people in a frame or a video,
When it comes to deep learning object detection, there are primary three object detection neural net architecture,
- R-CNN and its variant; Original R-CNN, Fast R-CNN, Faster R-CNN.
- Single shot detector.
- YOLO. (YOLOv3) Currently Used
Compute the minimum pixel thrsehold to conclude violation.
Compute the pair wise distances between all the detected people.
Based on the distances we will monitor the social distancing.
Monitor Social Distancing Violation Index Scale - 1: Good; 0:Poor.
The algorithm calculates and reports the following parameters.
Social Distancing Violation: Number of times the pedestrians violated the 6 feet safe distance threshold.
Number of People in the video
3.Social-distancing Index: Quantifies the social distancing being maintained. 0 means all of the interaction violate the safe 6 feet distance criteria, 0.5 means half of the interactions violate the safe 6 feet distance criteria, 1 means none of the interaction violate the safe 6 feet distance criteria. Based on the Social Distancing Index the AI can be used by humanitarian and law enforcement processionals to gauge whether people are abiding by public health guidance.