Establishing motion correspondence

Rangarajan, K.; Shah, Mubarak

doi:10.1109/cvpr.1991.139669

Cited by 67 publications

(56 citation statements)

References 10 publications

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“…It uses the principle of prediction to select candidates for an association and the minimal distance criteria to choose the best one. The best associations were obtained by a greedy approach similar to the method proposed by Rangarajan and Shah (1991). An estimate for the particle position in the second image was obtained by adding the displacement vector of the preceding calculation step to each particle position in the first image.…”

Section: Initial Algorithmmentioning

confidence: 99%

Image processing for the study of bedload transport of two-size spherical particles in a supercritical flow

Hergault¹,

Frey²,

Métivier

et al. 2010

Exp Fluids

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Bedload sediment transport of two-size coarse spherical particle mixtures in a turbulent supercritical flow was analyzed with image and particle tracking velocimetry algorithms in a two-dimensional flume. The image processing procedure is entirely presented. Experimental results, including the size, the position, the trajectory, the state of movement (rest, rolling, and saltation), and the neighborhood configuration of each bead, were compared with a previous one-size experiment. Analysis of the solid discharge along the vertical displayed only one peak of rolling in the two-size bed, whereas three peaks of rolling appeared in the one-size case due to a larger collective motion. The same contrast is evidenced in spatio-temporal diagrams where the two-size mixtures are characterized by the predominance of saltation and a smaller number of transitions between rest and rolling. The segregation of fine particles in a bed formed by larger particles was analyzed taking into account the neighborhood configurations.

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Section: Initial Algorithmmentioning

confidence: 99%

Image processing for the study of bedload transport of two-size spherical particles in a supercritical flow

Hergault¹,

Frey²,

Métivier

et al. 2010

Exp Fluids

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“…Measurements of rotation can be achieved through motion correspondence of the set of feature points on the object. The correspondence is achieved using proximal uniforrnity constraint [9]. The accuracy of the overall procedure is improved using a least squares error approach on an over-determined system of equations.…”

Section: Related Experiments: Particle Propertiesmentioning

confidence: 99%

Development of a non-intrusive particle tracing technique for granular chute flows

Rosato¹,

Davé²,

Fischer³

et al. 1992

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“…[9] address this problem, but they assume availability of 3D data for points. Rangarajan and Shah [32] use their proximal uniformity constraint to predict the position of missing points. However, their method requires that all points be available in the first two frames.…”

Section: Missing Tokensmentioning

confidence: 99%

“…The question naturally arises as to how accurate does this estimate have to be. In [32], the authors use information from frames k and k -1, as well as the smoothness constrains to generate the missing point in frame k + 1. Our simulation results clearly show that even a model as simple and naive as uniformly distributed random points serves the purpose of establishing correspondence.…”

Section: 2mentioning

confidence: 99%

“…Grimson and Lozano-Perez propose a tree pruning algorithm in [13] which needs exhaustive examination of various mutual relationships between the parameters they define for all token pairs. Rangarajan and Shah [32] have tried to use a proximal uniformity constrain to obtain correspondence. In [40], the authors use multiple attributes (like edgeness, intensity, cornerness) and multiple constraints (like intra-region smoothing, occlusion).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On correspondence, line tokens and missing tokens

Lee

Joshi

1995

Pattern Recognition

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In this article, the authors expand on some of their previous work on correspondence and propose a system that can correspond in the presence of both point and line tokens, or a mix of them. It can also work if some tokens present in one frame are not present in the other. The proposed algorithm is an amalgamation of reductionist and holist paradigms. We establish that properties which remain invariant for whole image sequences and sequences consisting of corresponding parts from each image frame can be used to establish correspondence. Extensive computer simulation results on synthesised data as well as real image sequences are presented to validate our claims.

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Establishing motion correspondence

Cited by 67 publications

References 10 publications

Image processing for the study of bedload transport of two-size spherical particles in a supercritical flow

Image processing for the study of bedload transport of two-size spherical particles in a supercritical flow

Development of a non-intrusive particle tracing technique for granular chute flows

On correspondence, line tokens and missing tokens

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