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A novel method for calculating camera coverage in buildings using BIM

Many organizations claimed that adopting surveillance cameras is costly for both installation and maintenance. This issue is mainly related to the camera placement, which is affected by the camera coverage calculation method. The main objective of this paper is to develop a novel method that can achieve accurate calculation of the camera coverage inside buildings. Building constraints including HVAC components can affect the camera coverage calculation due to physical effects such as vibration. The proposed method has the following steps: (1) defining the camera placement; (2) validating the camera scenes; (3) generating cells and assigning importance values; (4) visibility analysis; and (5) calculating the camera coverage. The paper also includes a sensitivity analysis for evaluating the suitable cell size in order to cover the monitored area. The feasibility of the method is tested using a case study. The case study demonstrates the benefits of using BIM in calculating the camera coverage in buildings. The study conducts four scenarios to evaluate the effect of the field-of-view and tilt angles on the camera coverage.