The proposed invention utilizes the detection of human heads using the computer vision model and then camera optics information to determine the distance of each detected human head from the camera focal point. The resolution of detected distance is 0.5 meter, i.e., participants are detected at discrete increments of 0.5 meters.
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Anonymous, "Estimation of Distance of People from Video Camera without Dedicated Depth Sensors", Technical Disclosure Commons, (September 01, 2022)