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Jul 11, 2012
Detection of Construction Workers in Video Frames for Automatic Initialization of Vision Trackers
Authors: Man-Woo Park [email protected], Evangelos Palinginis [email protected], and Ioannis Brilakis [email protected]Author Affiliations
Publication: Construction Research Congress 2012: Construction Challenges in a Flat World
Abstract
Vision based tracking can provide the spatial location of construction entities such as equipment, workers, and materials in large scale, congested construction sites. It tracks entities in video streams by inferring their locations based on the entities' visual features and motion histories. To initiate the process, it is necessary to determine the pixel areas corresponding to the construction entities to be tracked in the following consecutive video frames. In order to fully automate the process, an automated way of initialization is needed. This paper presents the method for construction worker detection which can automatically recognize and localize construction workers in video frames. The method first finds the foreground areas of moving objects using a background subtraction method. Within these foreground areas, construction workers are recognized based on the histogram of oriented gradients (HOG) and histogram of the HSV colors. HOG's have proved to work effectively for detection of people, and the histogram of HSV colors helps differentiate between pedestrians and construction workers wearing safety vests. Preliminary experiments show that the proposed method has the potential to automate the initialization process of vision based tracking.
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© 2012 American Society of Civil Engineers.
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Published online: Jul 11, 2012
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School of Civil & Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA. E-mail: [email protected]
School of Civil & Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA. E-mail: [email protected]
School of Civil & Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA. E-mail: [email protected]
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.