By Miguel Lourenço, João Pedro Barreto (auth.), Andrew Fitzgibbon, Svetlana Lazebnik, Pietro Perona, Yoichi Sato, Cordelia Schmid (eds.)
The seven-volume set comprising LNCS volumes 7572-7578 constitutes the refereed court cases of the twelfth eu convention on laptop imaginative and prescient, ECCV 2012, held in Florence, Italy, in October 2012. The 408 revised papers provided have been conscientiously reviewed and chosen from 1437 submissions. The papers are equipped in topical sections on geometry, 2nd and 3D form, 3D reconstruction, visible acceptance and type, visible good points and picture matching, visible tracking: motion and actions, versions, optimisation, studying, visible monitoring and photograph registration, photometry: lights and color, and photograph segmentation.
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Extra resources for Computer Vision – ECCV 2012: 12th European Conference on Computer Vision, Florence, Italy, October 7-13, 2012, Proceedings, Part IV
The space variables x and y are further omitted for sake of simplicity. Let dt be the time step, the state vector at discrete index k, 0 ≤ k ≤ Nt , is denoted X(k) = X(k × dt). (ξ(k)w(ξ(k))) . (q(k)w(ξ(k))) Nobs image observations I(ti ) are available from the image sequence, at indexes t1 < · · · < ti < · · · < tNobs . (17,15,16) is expressed as a constrained optimisation problem: the cost function with Zk (X(k)) = J(X) = 1 2 Ω 1 + 2 BI−1 (Is (0) − I(t1 ))2 dxdy (18) Nobs R i=1 −1 (ti )(Is (ti ) − I(ti )) dxdy 2 Ω has to be minimised over Eq.
25,26) are approximated as in : dt ((F u )ki+1,j − (F u )ki,j ) dx dt ((F v )ki,j+1 − (F v )ki,j ) − dx ∗ k = ξi,j − ξi,j (27) ∗∗ k = ξi,j ξi,j (28) with F u = uξ and F v = vξ. A non-central scheme of order 3 (see ) is used to approximate ﬂuxes (F u ) and (F v ) from the discrete representations of ξ and w. (F u )ki+1,j is equal to: k k k k uki+1,j [ξi,j + d0 (νi+1,j )(ξi+1,j − ξi,j )+ k k k )(ξi,j − ξi−1,j )] d1 (νi+1,j k k k k uki+1,j [ξi+1,j + d0 (νi+1,j )(ξi,j − ξi+1,j )+ k k k d1 (νi+1,j )(ξi+1,j − ξi+2,j )] if uki+1,j ≥ 0 (29) if uki+1,j < 0 (30) dt k k with d0 (ν) = 16 (2 − ν)(1 − ν), d1 (ν) = 16 (1 − ν)2 and νi+1,j = dx |ui+1,j |.
The authors acknowledge the Portuguese Science Foundation (FCT) that generously funded this work through grants PTDC/EIACCO/109120/2008 and SFRH/BD/63118/2009. uk/rbf/CAVIARDATA1/ 14 M. P. Barreto References 1. : An Iterative Image Registration Technique with an Application to Stereo Vision. In: DARPA Image Understanding Workshop, pp. 121–130 (1981) 2. : Good features to track. In: IEEE-CVPR, pp. 593–600 (1994) 3. : Object Tracking: A survey. ACM Comput. Surv. 38 (2006) 4. : Visual Modeling with a Hand-Held Camera.
Computer Vision – ECCV 2012: 12th European Conference on Computer Vision, Florence, Italy, October 7-13, 2012, Proceedings, Part IV by Miguel Lourenço, João Pedro Barreto (auth.), Andrew Fitzgibbon, Svetlana Lazebnik, Pietro Perona, Yoichi Sato, Cordelia Schmid (eds.)