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Metody śledzenia obiektów w rozproszonych systemach monitoringu wideo

Lisowski K., Czyżewski A.

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

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2013

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Nr 36

131--136

PL

Systemy monitoringu wideo stały się powszechną częścią zarówno przestrzeni publicznej jak również miejsc o ograniczonym dostępie. Nadzór obszaru o dużej powierzchni wymaga rozmieszczenia wielu kamer. Skuteczna analiza przez człowieka dużej liczby obrazów wideo jest praktycznie niemożliwa. Dlatego rozwijane są metody służące do automatycznego przetwarzania wideo ukierunkowanego na analizę kontekstową. W przypadku niepokrywających się pól widzenia kamer znaczenia nabiera również reidentyfikacja obiektów w różnych kamerach. Ten referat koncentruje się na przeglądzie metod śledzenia obiektów pomiędzy kamerami. Docelowo automatyczna analiza ma ułatwić śledzenie sytuacji na dużym obszarze poprzez wskazanie strumieni wideo skojarzonych z pewnymi istotnymi zdarzeniami.

EN

Video surveillance systems have become common part of both the public space also restricted access. Surveillance area requires high surface area arrangement of multiple cameras. Effective analysis of a large number of human video is practically impossible. This paper focuses on a review of methods for tracking objects between cameras. Ultimately, the automatic analysis to facilitate follow the situation in a large area by identifying video streams associated with some significant events.

2

Adaptive Method of Adjusting Flowgraph for Route Reconstruction in Video Surveillance Systems

Czyżewski A., Lisowski K.

Fundamenta Informaticae

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2013

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Vol. 127, nr 1-4

561--576

EN

Pawlak's flowgraph has been applied as a suitable data structure for description and analysis of human behaviour in the area supervised with multicamera video surveillance system. Information contained in the flowgraph can be easily used to predict consecutive movements of a particular object. Moreover, utilization of the flowgraph can support reconstructing object route from the past video images. However, such a flowgraph with its accumulative nature needs a certain period of time for adaptation to changes in behaviour of objects which can be caused, e.g. by closing a door or placing other obstacle forcing people to pass it by. In this paper a method for reduction of time needed for flowgraph adaptation is presented. Additionally, distance measure between flowgraphs is also introduced in order to determine if carrying out the adaptation process is needed.

3

Optimization of Nonconservative Systems, Comparison of Evolutionary Algorithms with Direct Method

Imiełowski S., Lisowski K.

Machine Dynamics Problems

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2007

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Vol. 31, No. 4

57-67

EN

Optimization of nonconservative system is reconsidered from the point of view of possibility of application of evolutionary algorithms. The method is verified on example cracked columns subjected to follower compressive force. The model of passive elastic rotational joint and rotationally-slidable joint as idealization of the opening and sliding modes of propagation of the crack are applied. The optimization process is based on the multimodal approach. The application of the evolutionary approach to the considered problem and obtained results are then compared with the analysis carried out by direct method, in which the direct influence of the parameters on the value of the critical force is developed.