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Motion as Shape: A Novel Method for the Recognition and Prediction of Biological Motion

R. C. Wilson, S. Das, L. H. Finkel
2006 Procedings of the British Machine Vision Conference 2006  
We introduce a method for the recognition and prediction of motion, based on the idea that different motions trace out different shapes in some state space.  ...  In the recognition step we use a multidimensional generalization of the shape context [1] to find the closest prototype motion to the observed data.  ...  Acknowledgements We thank Hanna Wallach for useful conversations about belief networks and the Center for Human Modeling and Simulation for use of the ReActor system.  ... 
doi:10.5244/c.20.69 dblp:conf/bmvc/WilsonDF06 fatcat:nu22wmgcofeynei2jdyz2w6ftu

Collective motion as a distinct behavioral state of the individual [article]

Daniel Knebel, Ciona Sha-ked, Noa Agmon, Gil Ariel, Amir Ayali
2020 bioRxiv   pre-print
Overall, our findings suggest that collective-motion is more than an emergent property of the group, but a specific behavioral mode that is rooted in endogenous biological mechanisms of the individual.  ...  Locusts are a quintessential example of collective motion: while displaying a minimal level of cooperation between individuals, swarms of millions are highly robust and persistent.  ...  See Methods for details and Table S1 for parameter values.  ... 
doi:10.1101/2020.06.15.152454 fatcat:lt5u6cvsprgh3hujhztbfvlhoq

Comparing methods for scaling shape similarity

Ernest Greene
2019 AIMS Neuroscience  
It is useful to evaluate alternative methods for quantifying shape attributes to see which best predicts human judgments of shape similarity.  ...  Procrustes analysis is a statistical method for comparing shape pairs that normalizes distances of boundary markers relative to their centroids, centers the shapes on their centroids, and then derives  ...  Acknowledgment This work was supported by the Quest for Truth Foundation.  ... 
doi:10.3934/neuroscience.2019.2.54 pmid:32341968 pmcid:PMC7179340 fatcat:gvsr7jx6wvgidhpo4gjq5kdhie

Visual Learning Shapes the Processing of Complex Movement Stimuli in the Human Brain

J. Jastorff, Z. Kourtzi, M. A. Giese
2009 Journal of Neuroscience  
The results of experiment 1 revealed three different effects as a consequence of training: (1) Emerging fMRI-selective adaptation in general motion-related areas (hMT/V5+, KO/V3b) for the differences between  ...  Recognition of actions and complex movements is fundamental for social interactions and action understanding.  ...  First, our experiments investigated the role of visual learning in the discrimination of novel biological movements that mediate recognition of individual actions rather than detection in random noise  ... 
doi:10.1523/jneurosci.3070-09.2009 pmid:19890012 pmcid:PMC6666703 fatcat:zzbmf6bkmnhqjlhotikxnycvla

Detecting shape deformation of moving patterns

Gunter Loffler, Hugh R Wilson
2001 Vision Research  
This indicates that detectors tuned to radial and circular motion are involved in the computation of shape deformation.  ...  The stimuli employed were closed contours created by the sum of two 'radial frequency' components and sensitivity to their deformation was measured as a function of the difference in the angular velocities  ...  Acknowledgements We are grateful to Steven Shevell, Gael Gordon, David Burr, and one anonymous referee for sharing their thoughts and giving helpful suggestions.  ... 
doi:10.1016/s0042-6989(01)00012-8 pmid:11301074 fatcat:apyn3tjyivfh3b2ntmc7ub36bu

Motion, not Shape, Facilitates Association of Predation Risk with Novel Objects by Fathead Minnows (Pimephales promelas)

Brian D. Wisenden, Katherine R. Harter
2001 Ethology  
Erin Watkin assisted in the ®eld collection of study animals and Aleen Kienholz maintained the ®sh holding facilities. Literature Cited  ...  Acknowledgements Funding and research facilities were provided by Minnesota State University Moorhead.  ...  Motion, and not shape per se, is thus a predictable and reliable component of predation and may serve as an immediate releaser of learned risk association.  ... 
doi:10.1046/j.1439-0310.2001.00667.x fatcat:dcb4btlpyjh6thsk7rnnpfgxdq

Visual judgment of similarity across shape transformations: Evidence for a compositional model of articulated objects

Elan Barenholtz, Michael J. Tarr
2008 Acta Psychologica  
A single biological object, such as a hand, can assume multiple, very different shapes, due to the articulation of its parts.  ...  We compared similarity judgments in a task in which subjects had to decide which of the two transformed versions of a 'base' shape-one a 'biologically valid' articulation and one a geometrically similar  ...  It is likely that other aspects of visual recognition do as well. Fig. 1 . 1 A novel shape with an intuitive articulatory structure.  ... 
doi:10.1016/j.actpsy.2008.03.007 pmid:18466857 fatcat:cb66qdw5vfh6la754lrifvoyni

Modulation of Viewpoint Effects in Object Recognition by Shape and Motion Cues

Quoc C Vuong, Alinda Friedman, Courtney Plante
2009 Perception  
This research was supported by a grant from the Natural Sciences and Engineering Research Council of Canada to Alinda Friedman.  ...  We thank Bernd Kohler for programming the experiments and for help collecting the data.  ...  This expectation predicts that in experiments 2 and 3 there should be a larger viewpoint effect for motion on trials when the motions are similar.  ... 
doi:10.1068/p6430 pmid:20120262 fatcat:kzvez5po4bhwxdqn55zxwlhmpu

EventHPE: Event-based 3D Human Pose and Shape Estimation [article]

Shihao Zou, Chuan Guo, Xinxin Zuo, Sen Wang, Pengyu Wang, Xiaoqin Hu, Shoushun Chen, Minglun Gong, Li Cheng
2021 arXiv   pre-print
Event camera is an emerging imaging sensor for capturing dynamics of moving objects as events, which motivates our work in estimating 3D human pose and shape from the event signals.  ...  To mitigate the discrepancy between image-based flow (optical flow) and shape-based flow (vertices movement of human body shape), a novel flow coherence loss is introduced by exploiting the fact that both  ...  Acknowledgement Thank all the volunteers who contribute to the dataset, and thank Shuang Wu and Wei Ji for their constructive advice.  ... 
arXiv:2108.06819v1 fatcat:yhlkmjbg2fdafkinl5uo5bi3pa

The relative weight of shape and non-rigid motion cues in object perception: A model of the parameters underlying dynamic object discrimination

Q. C. Vuong, A. Friedman, J. C. A. Read
2012 Journal of Vision  
We then combined shape morphing with the novel motion morphing technique to pairs of multipart objects to create a joint shape and motion similarity space.  ...  Shape and motion are two dominant cues for object recognition, but it can be difficult to investigate their relative quantitative contribution to the recognition process.  ...  Acknowledgments We would like to thank Katja Mayer for the initial set of stimuli; Bernd Kohler for programming the experiment; and Tyler Austring, Michelle Foisey, and Geoff Hollis for data collection  ... 
doi:10.1167/12.3.16 pmid:22427696 fatcat:2qam7njhnzccpoh5dwqkehnyte

Simple Rules Reproduce a Hub-Shaped Cell Metabolic Network

2005 PLoS Biology  
The chicks were immediately drawn to and stayed close to iconic patterns of animal motion, also known as biological motion.  ...  , and a fourth, the "scrambled hen," conveyed biological motion, but of an unknown creature (as perceived by human observers).  ... 
doi:10.1371/journal.pbio.0030261 fatcat:ayoft4fzzbatdfp5tqrzxfxnhy

Determination of visual figure and ground in dynamically deforming shapes

Elan Barenholtz, Jacob Feldman
2006 Cognition  
Previous research on the assignment of figure and ground to opposing sides of a contour has almost exclusively involved static geometric factors -such as convexity, symmetry, and size -in non-moving images  ...  Here, we introduce a new class of cue to figural assignment based on the motion of dynamically deforming contours.  ...  That is, concave regions may provide a means of predicting how an object may deform, based on its geometry, even when no motion is observed -a possibility with strong implications for the recognition of  ... 
doi:10.1016/j.cognition.2005.12.002 pmid:16448640 fatcat:qj2xheeyy5bazevp7mfad3d7lm

Shape beyond recognition: Form-derived directionality and its effects on visual attention and motion perception

Heida M. Sigurdardottir, Suzanne M. Michalak, David L. Sheinberg
2014 Journal of experimental psychology. General  
The observed connection between form and space suggests that shape processing goes beyond recognition alone and may help explain why shape is a relevant dimension throughout the visual brain.  ...  This shape information is swiftly and automatically incorporated into the allocation of overt and covert visual orienting and the detection of motion, processes that themselves are inherently directional  ...  Indeed, the shape of an object influences processes thought to depend on the dorsal visual stream, such as visual orienting and estimation of motion, in addition to object recognition and categorization  ... 
doi:10.1037/a0032353 pmid:23565670 pmcid:PMC3726554 fatcat:rw27kp5fifg5rkmaq75w3leukq

Shape-invariant perceptual encoding of dynamic facial expressions across species [article]

Nick Taubert, Michael Stettler, Ramona Siebert, Silvia Spadacenta, Louisa Sting, Peter Dicke, Peter Thier, Martin Giese
2020 bioRxiv   pre-print
While popular neural-network theories predict a joint encoding of facial shape and dynamics, the neuromuscular control of faces evolved more slowly than facial shape, suggesting a separate encoding.  ...  This result supports the co-evolution of the visual processing and motor-control of facial expressions, while it challenges popular neural-network theories of dynamic expression-recognition.  ...  shape and its motor control should potentially imply a separate visual encoding of expression 53 dynamics and basic face shape. 54 We investigated these hypotheses, exploiting advanced methods from computer  ... 
doi:10.1101/2020.07.10.195941 fatcat:twkg6zyzxfhktosbewvhk6sdaa

Square bananas, blue horses: the relative weight of shape and color in concept recognition and representation

Claudia Scorolli, Anna M. Borghi
2015 Frontiers in Psychology  
In Experiment 3 (motion evaluation task), we replicated the disadvantage for shape-altered animals, while with fruits shape and color modifications produced no effect.  ...  Results showed that with animals color does not matter, while shape modifications determined a deterioration of the performance -stronger for fruit than for animals.  ...  ACKNOWLEDGMENTS We would like to thank Roberto Bolzani for statistical advice.  ... 
doi:10.3389/fpsyg.2015.01542 pmid:26500593 pmcid:PMC4597035 fatcat:tx735evg45ggndhmptnryv5q74
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