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Related Concept Videos

Distance Measurements by Taping01:18

Distance Measurements by Taping

38
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

668
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
668
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

39
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Related Experiment Video

Updated: Jul 7, 2025

Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery
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Social Distance Approximation on Public Transport Using Stereo Depth Camera and Passenger Pose Estimation.

Daniel Steven Bell1, Philip James1, Martín López-García2

  • 1School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.

Sensors (Basel, Switzerland)
|December 23, 2023
PubMed
Summary
This summary is machine-generated.

Social distancing on public transport is challenging, becoming unlikely above 28% occupancy. Passenger preferences for comfort and views often outweigh maintaining distance, impacting infection control strategies.

Keywords:
Quantitative Microbial Risk Assessment (QMRA)RaspberryPiTransport Risk Assessment for COVID Knowledge (TRACK)computer visionpose estimationpublic transportsocial distancingstereo camera

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Area of Science:

  • Public Health
  • Transportation Engineering
  • Computer Vision

Background:

  • Pandemic necessitates balancing public transport operations with infection control.
  • Understanding passenger behavior and environmental conditions is crucial for safety.
  • Social distancing effectiveness on public transport requires quantitative analysis.

Purpose of the Study:

  • To assess the feasibility of social distancing on public transport.
  • To analyze passenger behavior and seating preferences in relation to social distancing.
  • To evaluate the utility of computer vision for monitoring social distancing.

Main Methods:

  • Deployment of a low-cost depth-sensing system on a public bus.
  • Utilizing advanced computer vision techniques to measure social distancing.
  • Analyzing passenger habits and seating preferences based on acquired data.

Main Results:

  • Social distancing is unlikely beyond a 28% bus occupancy threshold.
  • High probability (89%) of being within 1-2m of another passenger at 28% occupancy.
  • Passenger preferences prioritize comfort and views over maximizing social distancing.

Conclusions:

  • Current public transport design and passenger behavior limit effective social distancing.
  • Computer vision offers a robust method for monitoring environmental conditions and passenger behavior.
  • Findings inform strategies for safer public transport operations during health crises.