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Acoustic source location is determined by the intersection of a set of hyperbolic curves defined by Time Difference of Arrival (TDOA). Many researchers consider that the closed-form solution of the intersection is cumbersome as the equations are nonlinear, so few researchers focus on solving the equations. However, we find that the closed-form solution can be found easily and directly by Matlab. Three...
Abnormal crowd behavior detection plays an important role in surveillance applications. We propose a camera parameter independent and perspective distortion invariant approach to detect two types of abnormal crowd behavior. The two typical abnormal activities are people gathering and running. Since people counting is necessary for detecting the abnormal crowd behavior, we present an potential energy-based...
Reliable estimation of crowd density in public plays an important role on intelligent surveillance in recent years. There have been a lot of research on people counting; however, most of them only consider crowd with slight occlusions and their algorithms usually accompany with high computational complexity. In this paper, we present a simple model based on image potential energy to estimate the crowd...
In this paper, we present a novel method to detect two typical abnormal activities: pedestrain gathering and running. The method is based on the potential energy and kinetic energy. Reliable estimation of crowd density and crowd distribution are firstly introduced into the detection of anomalies. Estimation of crowd density is obtained from the image potential energy model. By building the foreground...
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