Analyzing Video Sequences of Multiple Humans: Tracking, - download pdf or read online

By Jun Ohya, Akira Utsumi, Junji Yamato

ISBN-10: 1461353467

ISBN-13: 9781461353461

ISBN-10: 1461510031

ISBN-13: 9781461510031

Analyzing Video Sequences of a number of people: monitoring, Posture Estimation and behaviour Recognition describes a few computing device vision-based equipment that research video sequences of people. extra in particular, equipment for monitoring a number of people in a scene, estimating postures of a human physique in 3D in real-time, and spotting a person's habit (gestures or actions) are mentioned. For the monitoring set of rules, the authors built a non-synchronous procedure that tracks a number of individuals by means of exploiting a Kalman filter out that's utilized to a number of video sequences. For estimating postures, an set of rules is gifted that locates the numerous issues which be sure postures of a human physique, in 3D in real-time. Human actions are well-known from a video series by means of the HMM (Hidden Markov Models)-based technique that the authors pioneered. The effectiveness of the 3 tools is proven by way of experimental results.

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Lim Pt(v) t->oo = P(v). 6) Considering local distributions, the above equations can be rewritten as follows. lim PI,t(vIT') t ..... oo = Pt(vIT') = kPI(vIT) + (1 lim Pl,t(v) t->oo = PI(V). k)Pl(vIB). 3). lim P(T)Pt(vIT') Pt(v) P(Tlv) = P(T)P(vIT') P(v) Hoc P(T]:(;')IT) + (1 - k)R(v). 9) (P(vIT) - P(vIT)). 9), the second term R( v) denotes the estimation error caused by the inclusion of the background region into T'. 3). We can expect the best performance in this case. 3) increases. When the selection of T' becomes full at random, the ratio k becomes P(T).

6 shows our observation model for one camera. Though a camera can observe multiple targets, we concentrate on a onetarget case to simplify the explanation. This explanation can easily be extended to multiple-target cases. Let us consider the target object hj located at XXj,t n (= (Xj,t n , lj,tn )) at time t n projected onto the image plane of the i-th camera at C i · Here,

31). 33) where K·),tn+l -- P'), t n+l HQ-l j,t n+l' P tn +1 = (Rj,ln+l + H'Qj,L+IH) -1. 35) According to the above equation, we can update the state vector for each observation Ztn+l. 2. 21 Finding New Targets At the initial stage of tracking, the system must be able to detect a target object that has newly appeared in the scene. Here, we describe the method to determine the initial state of the target. Since observation information is acquired asynchronously, the normal stereo matching cannot be used.

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Analyzing Video Sequences of Multiple Humans: Tracking, Posture Estimation and Behavior Recognition by Jun Ohya, Akira Utsumi, Junji Yamato

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