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Event Details

  • Monday, November 6, 2017
  • 10:30 - 11:00

Crowd Sensing in Hajj and Umrah

The world population is growing and today more than ever infrastructures of societies such as roads, shopping malls and transport terminals are having to cope with ever more intense and complex flows of people. Recent tragic incidents of mass gathering has brought into attention the need to understand crowd behaviours and develop methods and technique to sense and monitor crowd in order to ensure crowd safety and security. Advanced technologies of from computer vision and ubiquitous technologies allows to sense and monitor huge crowds and to understand their behaviors. Cameras equipped with intelligent algorithms are capable of counting the number of people in scene and assessing their density distribution. Moreover, videos cameras can measure movement speed, direction as well as flow rate in Tawaf and Saee (Hajj & Umrah rituals). In this study we present the use of computer vision to sense crowd size and density as well as flow rate in different parts of Hajj and Umrah. In Ramadan we measured the number crowd performing Tawaf and their flow rate using four cameras with overlapping view mounted on the rooftop of Mattaf. On 27 of Ramadan 1437H at midnight, we recorded the presence of about 27800 people in Mattaf and completing 7 laps of Tawaf around Kabba took about 55 minutes. This is considered the most crowded date in Ramadan season. In the Hajj season we recorded the maximum number of people in Mattaf on 12 ZulHijah 1437 at 5PM, the number of people performing Tawaf was recorded at 26100 person and the required to complete Tawaf was 56 minutes. In Saee, the throughput of the ground floor was about 14650 person/hour on 12 Dul Hijah 1437. These measurements and readings has been verified by manual counting and Tawaf timing recorded from GPS devices simultaneously with camera recording. In Mina, we recoded the flow of people going toward Jamarat Bridge using cameras mounting on King Khalid Bridge facing streets 204 Souq-Al-Arab and Jowhara and we also recorded the inflow and out flow to and from Jamarat Bridge. On 10 Zul Hijah 1437H at 10PM, the inflow to Jamarat Bridge at the largest ramp was measured as 5.44 person/min while the outflow at the largest ramp was measured at 5.46 person/min. Visit ivul.kaust.edu.sa and www.bernardghanem.com for more details.