title: Nonuniform video size reduction for moving objects.
abstract: Moving objects of interest (MOOIs) in surveillance videos are detected and encapsulated by bounding boxes. Since moving objects are defined by temporal activities through the consecutive video frames, it is necessary to examine a group of frames (GoF) to detect the moving objects. To do that, the traces of moving objects in the GoF are quantified by forming a spatiotemporal gradient map (STGM) through the GoF. Each pixel value in the STGM corresponds to the maximum temporal gradient of the spatial gradients at the same pixel location for all frames in the GoF. Therefore, the STGM highlights boundaries of the MOOI in the GoF and the optimal bounding box encapsulating the MOOI can be determined as the local areas with the peak average STGM energy. Once an MOOI and its bounding box are identified, the inside and outside of it can be treated differently for object-aware size reduction. Our optimal encapsulation method for the MOOI in the surveillance videos makes it possible to recognize the moving objects even after the low bitrate video compressions.
authors.affiliation: Department of Electrical and Electronic Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
authors.forename: Anh Vu
authors.identifier: 0000-0001-8879-3399
authors.initials: AV
authors.lastname: Le
authors.affiliation: Department of Multimedia Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
authors.forename: Seung-Won
authors.identifier: 0000-0002-0319-4467
authors.initials: SW
authors.lastname: Jung
authors.affiliation: Department of Electrical and Electronic Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea.
authors.forename: Chee Sun
authors.identifier: 0000-0002-3400-0792
authors.initials: CS
authors.lastname: Won
mesh_terms: D000465:Algorithms; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007091:Image Processing, Computer-Assisted / Q000379:methods; D009068:Movement / Q000502:physiology*; D010781:Photography / Q000379:methods*; D015203:Reproducibility of Results; D014741:Video Recording / Q000379:methods*