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Smart camera

About: Smart camera is a research topic. Over the lifetime, 5571 publications have been published within this topic receiving 93054 citations. The topic is also known as: intelligent camera.


Papers
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Patent
09 Sep 2005
TL;DR: In this paper, a mobile tracking system is provided for tracking a mobile object by the cooperation of multiple cameras, in which each camera includes a photographing device which photographs and recognizes the mobile object, a changing device which changes a view angle of the photographing devices, a position deriving device which derives a position of the camera, a distance deriving devices which derives the distance between the camera and the target, and a communication device which transmits an identifier of the target to another camera.
Abstract: An apparatus and method to track and to photograph a mobile object over a wide range, by a cooperative operation of multiple cameras. In addition, a mobile tracking system is provided for tracking the mobile object by the cooperation of multiple cameras, in which each camera includes a photographing device which photographs and recognizes the mobile object, a changing device which changes a view angle of the photographing device, a position deriving device which derives a position of the camera, a distance deriving device which derives the distance between the camera and the mobile object, and a communication device which transmits an identifier of the camera, a position of the camera, a moving direction of the mobile object and the distance between the camera and the mobile object to another camera and receives an identifier of the other camera, a position of the other camera, a moving direction of the mobile object and a distance between the other camera and the mobile object from the other camera.

81 citations

Journal ArticleDOI
TL;DR: This work forms the multi-camera control strategy as an online scheduling problem and proposes a solution that combines the information gathered by the wide-FOV cameras with weighted round-robin scheduling to guide the available PTZ cameras, such that each pedestrian is observed by at least one PTZ camera while in the designated area.
Abstract: We present a surveillance system, comprising wide field-of-view (FOV) passive cameras and pan/tilt/zoom (PTZ) active cameras, which automatically captures high-resolution videos of pedestrians as they move through a designated area. A wide-FOV static camera can track multiple pedestrians, while any PTZ active camera can capture high-quality videos of one pedestrian at a time. We formulate the multi-camera control strategy as an online scheduling problem and propose a solution that combines the information gathered by the wide-FOV cameras with weighted round-robin scheduling to guide the available PTZ cameras, such that each pedestrian is observed by at least one PTZ camera while in the designated area. A centerpiece of our work is the development and testing of experimental surveillance systems within a visually and behaviorally realistic virtual environment simulator. The simulator is valuable as our research would be more or less infeasible in the real world given the impediments to deploying and experimenting with appropriately complex camera sensor networks in large public spaces. In particular, we demonstrate our surveillance system in a virtual train station environment populated by autonomous, lifelike virtual pedestrians, wherein easily reconfigurable virtual cameras generate synthetic video feeds. The video streams emulate those generated by real surveillance cameras monitoring richly populated public spaces.

81 citations

Proceedings ArticleDOI
05 Jan 2005
TL;DR: It is shown that the MRF approach produces more accurate and visually appealing silhouettes that are less prone to noise and background camouflaging effects than traditional per-pixel based methods.
Abstract: Many video surveillance and identification applications need to find moving objects in the field of view of a stationary camera. A popular method for obtaining these silhouettes is through the process of background subtraction. We present a novel method for comparing image frames to the model of the stationary background that exploits the spatial and temporal dependencies that objects in motion impose on their images. We achieve this through the development and use of Markov random fields of binary segmentation variates. We show that the MRF approach produces more accurate and visually appealing silhouettes that are less prone to noise and background camouflaging effects than traditional per-pixel based methods. Results include visual examination of silhouettes, comparisons against hand-segmented data, and an analysis of the effects of various silhouette extraction techniques on gait recognition performance.

80 citations

Proceedings ArticleDOI
15 Oct 2004
TL;DR: The challenges involved in scheduling an active camera to observe multiple people to be discussed and some candidate scheduling policies are presented to address these challenges and evaluated.
Abstract: Remote identification of people is an important capability for security systems. Automatically controlling a pan-tilt-zoom camera is an effective way to collect high resolution video or images of people in an unconstrained environment. Often there will be more people in an area than cameras available. The cameras must then divide their time among the people in order to view everyone. In this paper, we discuss the challenges involved in scheduling an active camera to observe multiple people. We present some candidate scheduling policies to address these challenges and evaluate their performance. The evaluation was conducted with a simulation based on data collected with our cooperative active camera system.

80 citations

Dissertation
15 Dec 1994
TL;DR: Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1994.
Abstract: Thesis (Ph. D.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1994.

79 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202323
202262
202173
2020142
2019161
2018158