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Perceptual Strategies of Pigeons to Detect a Rotational Centre—A Hint for Star Compass Learning?
2015
PLoS ONE
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Here, we use operant conditioning to demonstrate that homing pigeons can principally learn to detect a rotational centre in a rotating dot pattern and we examine their behavioural response strategies in ...
Initially, most pigeons applied a strategy based on local stimulus information such as movement characteristics of single dots. One pigeon seemed to immediately ignore eccentric stationary dots. ...
Both velocity categorisation by local stimulus cues as well as coherent movement detection based on global information would be principally appropriate strategies to detect a rotational centre. ...
doi:10.1371/journal.pone.0119919
pmid:25807499
pmcid:PMC4373800
fatcat:fk6jl7f3rbdcrnhpd4npgtr3cu
A Fast Circle Detector with Efficient Arc Extraction
2022
Symmetry
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In this paper, we propose a circle detection method with efficient arc extraction. ...
To address the contour curve segmentation difficulty, we improved the CTAR (Chord to Triangular Arms Ratio) corner detection method to enhance corner point detection and segment the contour curves based ...
Acknowledgments: We are grateful to the High Performance Computing Center of Central South University for assistance with the computations. ...
doi:10.3390/sym14040734
fatcat:aeub23n7tjh55dmrmkxmm4ze2a
Aircraft deconfliction with speed regulation: new models from mixed-integer optimization
2013
Journal of Global Optimization
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We focus on mixed-integer optimization models based on speed regulation. We first solve the problem to global optimality by means of an exact solver. ...
Detecting and solving aircraft conflicts, which occur when aircraft sharing the same airspace are too close to each other according to their predicted trajectories, is a crucial problem in Air Traffic ...
Simple symmetry breaking constraint like q i ≤ q j ∀i, j ∈ A, i < j, (23) adjoined to the formulation, may help to speed up the resolution. ...
doi:10.1007/s10898-013-0070-1
fatcat:oa6iqpfi6zao3cipjs5nbzzig4
WAVELET ANALYSIS AND NEURAL NETWORK CLASSIFIERS TO DETECT MID-SAGITTAL SECTIONS FOR NUCHAL TRANSLUCENCY MEASUREMENT
2016
Image Analysis and Stereology
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The proposed methodology is mainly based on wavelet analysis and neural network classifiers to detect the jawbone and on radial symmetry analysis to detect the choroid plexus. ...
A good mid-sagittal section is a key requirement to make the correct measurement of nuchal translucency which is one of the main marker for screening of chromosomal defects such as trisomy 13, 18 and 21 ...
This paper describes a methodology, mainly based on wavelet analysis and neural network classifiers to detect the jawbone and on radial symmetry analysis to detect the choroid plexus. ...
doi:10.5566/ias.1352
fatcat:2vjwbnsvrneffnydwjutn5zcga
Effects of salience and reward information during saccadic decisions under risk
2009
Optical Society of America. Journal A: Optics, Image Science, and Vision
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This was in line with an improvement in accuracy for single targets up to 160 ms. ...
Previous work has demonstrated that humans select visuomotor strategies maximizing expected gain during speeded hand movements under risk; see, e.g., [Trends Cogn. ...
This research was supported by the Deutsche Forschungsgemeinschaft (DFG) to M. Stritzke and J. Trommershäuser under grant TR 528 1-3; 1-4. ...
doi:10.1364/josaa.26.0000b1
pmid:19884911
fatcat:zf6ufznokbbc7cyvs4y4e43ltq
The Uperpages Considered Harmful
2019
International journal of recent technology and engineering
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In this position paper, we present new empathic epistemologies (Ers), which we use to discredit that the original "fluffy" calculation for the fitting unification of operators and dynamic systems by John ...
Commodore 64s; lastly (3) that we can do much to influence a heuristic's hard circle speed. ...
In potential Ers renditions, we plan to obtain a big amount of ideas from this previous job. We now compare our technique with linked occasion driven symmetries strategies [1]. ...
doi:10.35940/ijrte.b1496.0882s819
fatcat:bfzksl4uyrbajoutjl7acfjoky
Straight Lines and Circles in the Log-Polar Image
2000
Procedings of the British Machine Vision Conference 2000
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An efficient and practical method based on convolution is described, and investigated in the context of a simple foveation strategy. ...
These properties are exploited here for the detection of general straight lines, line segments, and circles through the foveation point. ...
Efficient detection of straight lines and circles in log-polar images has been implemented. ...
doi:10.5244/c.14.43
dblp:conf/bmvc/Young00
fatcat:bf5ui5dqrvgshppltw5noehdeu
An experimental comparison of force-directed and randomized graph drawing algorithms
[chapter]
1996
Lecture Notes in Computer Science
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Combining time and quality we recommend to use GEM or KK first, then FR and Tu and finally DH. * This research is partially supported by the Deutsche Forschungsgemeinschaft, Grant Br 835/6-1, Forschungsschwerpunkt ...
We wish to thank A. Ludwig for making the GEM available to us, and F. Dichtl for tests with the algorithms. ...
This leads to a significant speed-up over an earlier version of KK, which was under study by Frick et al. [6] and Himsolt [10] . ...
doi:10.1007/bfb0021792
fatcat:e7umnmhcpnalrf5dcupribu4l4
Spatial-scale contribution to the detection of mirror symmetry in fractal noise
1999
Optical Society of America. Journal A: Optics, Image Science, and Vision
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We investigated how the detection of mirror symmetry depends on the distribution of contrast energy across spatial scales. ...
While overall rms contrast remained fixed at 25%, symmetry-detection thresholds were obtained by corrupting the signal with variable amounts of noise with identical spectral characteristics. ...
ACKNOWLEDGMENTS The authors are grateful to David Field and Steve Dakin for their useful suggestions and comments on this study. ...
doi:10.1364/josaa.16.002112
pmid:10474892
fatcat:2xnkzd4txzav7g57elu4upyjpu
Decentralized Multi-Robot Collision Avoidance: A Systematic Review from 2015 to 2021
2022
Symmetry
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This article aims to conduct a systematic literature review of different collision-avoidance strategies and analyze the performance of innovative collision-avoidance techniques. ...
An exploration task can be performed by a team of mobile robots more efficiently than human counterparts. ...
2 Open space MR-DFS Reduces edge traversals Only static obstacles Yield faster [5] Velocity-based detection regions Up to 20 Open space Constant detection radii and less conservative N/A trajectories ...
doi:10.3390/sym14030610
fatcat:r22u4id3dvbwnontrso4rdnrc4
Anticipatory Defocusing of Attention and Contextual Response Priming but no Role of Aesthetic Appreciation in Simple Symmetry Judgments when Switching between Tasks
2020
Symmetry
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on inhomogeneity detection. ...
We asked participants to switch between judging the symmetry of vertically presented three-letter strings and identifying the central stimulus (i.e., Eriksen task) to investigate anticipatory adjustment ...
The participants were instructed to press the left-sided key if they detected a white circle and to press the right-sided key if they detected a black square. ...
doi:10.3390/sym12040577
fatcat:d2vmzi6sszdmdhb2c224psiypm
COPE: End-to-end trainable Constant Runtime Object Pose Estimation
[article]
2022
arXiv
pre-print
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2022 pre-print arXiv:2208.08807v1 fatcat:wpaz6rwuz5gjpl2oyhfajumkq4
Further results show the advantage of supervising geometric-correspondence-based object pose estimation with the 6D pose. ...
State-of-the-art object pose estimation handles multiple instances in a test image by using multi-model formulations: detection as a first stage and then separately trained networks per object for 2D-3D ...
Green and blue bounding boxes correspond to estimates and ground truth, respective. Errors are indicated with a red and white circle. Best viewed on screen. ...
arXiv:2208.08807v2
fatcat:twsnvhnqjvbajkj43hoigawhhq
Attentional set for axis of symmetry in symmetry-defined visual search
2006
Perception & Psychophysics
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If vertical symmetry or horizontal symmetry were detected to perform the visual search task, axis orientation should have an effect on search efficiencies. ...
target might be found as a failure to detect symmetry. If the observers did not keep their attentional set for asymmetry per se, did they try to detect vertical symmetry or symmetry in general? ...
To evaluate any effect of order, such as that from practice, we compared the mean RTs for the first half of the trials with those for the latter half of the trials for each search conditions in Experiments ...
doi:10.3758/bf03193717
pmid:17355039
fatcat:ys23dc37yfc2xbu7on3ftgadh4
Breaking camouflage and detecting targets require optic flow and image structure information
2017
Applied Optics
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Our results show that the combination of motion-generated optic flow and targetprojected image structure information yielded efficient and stable perception of camouflaged targets. ...
Use of motion to break camouflage extends back to the Cambrian [In the Blink of an Eye: How Vision Sparked the Big Bang of Evolution (New York Basic Books, 2003)]. ...
In other words, participants used their VSTM, and this strategy was indeed reflected in the data: in the No Blank condition, where the textured screen was continuously available to the participants, hits ...
doi:10.1364/ao.56.006410
pmid:29047842
fatcat:ltg72rmpkzfo7iu2tfndov26dy
Looking for symmetry: fixational eye movements are biased by image mirror symmetry
2016
Journal of Neurophysiology
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Looking for symmetry: fixational eye movements are biased by image mirror symmetry. ...
GRANTS This research was funded by the Agence National de la Recherche (Grant SPEED, ANR-13-SHS2-0006) and the Centre National de la Recherche Scientifique (CNRS). J. ...
Humans are very fast and efficient at detecting mirror-symmetric stimuli (Carmody et al. 1977; Wagemans et al. 1991) . ...
doi:10.1152/jn.01152.2015
pmid:27306681
pmcid:PMC5018060
fatcat:xjje6gerivas3kwxcifirkbwga
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