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AMAT: Medial Axis Transform for Natural Images [article]

Stavros Tsogkas, Sven Dickinson
2017 arXiv   pre-print
We introduce Appearance-MAT (AMAT), a generalization of the medial axis transform for natural images, that is framed as a weighted geometric set cover problem.  ...  We make the following contributions: i) we extend previous medial point detection methods for color images, by associating each medial point with a local scale; ii) inspired by the invertibility property  ...  We thank Ioannis Gkioulekas for his valuable suggestions and feedback.  ... 
arXiv:1703.08628v2 fatcat:lnzslfhxsbbupgq3oekshmxwai

Appearance Shock Grammar for Fast Medial Axis Extraction from Real Images [article]

Charles-Olivier Dufresne Camaro, Morteza Rezanejad, Stavros Tsogkas, Kaleem Siddiqi, Sven Dickinson
2020 arXiv   pre-print
We combine ideas from shock graph theory with more recent appearance-based methods for medial axis extraction from complex natural scenes, improving upon the present best unsupervised method, in terms  ...  ; ii) we then use the rules of a Shock Grammar to guide our search for medial points, drastically reducing run time when compared to other methods, which exhaustively consider all points in the input image  ...  Acknowledgements We thank the Natural Sciences and Engineering Research Council of Canada (NSERC), the Fonds de recherche du Québec -Nature et technologies (FRQNT), and Samsung for research funding.  ... 
arXiv:2004.02677v1 fatcat:vohghovsererffnewmmzklfkqa

Morphologic Features of the Amygdala and Hippocampus in Children and Adults With Tourette Syndrome

Bradley S. Peterson, HuiMahn A. Choi, Xuejun Hao, Jose A. Amat, Hongtu Zhu, Ronald Whiteman, Jun Liu, Dongrong Xu, Ravi Bansal
2007 Archives of General Psychiatry  
Design: A cross-sectional, case-control study using anatomical magnetic resonance imaging. Setting: University research center.  ...  Surface analyses suggested that the increased volumes in the TS group derived primarily from the head and medial surface of the hippocampus (over the length of the dentate gyrus) and the dorsal and ventral  ...  Exclusion criteria for control subjects were a history of tic disorder, OCD, ADHD, or other current axis I disorders.  ... 
doi:10.1001/archpsyc.64.11.1281 pmid:17984397 pmcid:PMC2291296 fatcat:7gt2qkfp6fbm3oyk55cygbebui

Cortical representations of olfactory input by trans-synaptic tracing

Kazunari Miyamichi, Fernando Amat, Farshid Moussavi, Chen Wang, Ian Wickersham, Nicholas R. Wall, Hiroki Taniguchi, Bosiljka Tasic, Z. Josh Huang, Zhigang He, Edward M. Callaway, Mark A. Horowitz (+1 others)
2010 Nature  
Specifically, the rabies envelope glycoprotein (G) required for viral spread was replaced with a fluorescent marker 6 .  ...  For example, the cortical amygdala preferentially receives dorsal olfactory bulb input, whereas the piriform cortex samples the whole olfactory bulb without obvious bias.  ...  Scale bars, 1 mm for low-magnification images at the top, 100 mm for high-magnification images at the bottom.  ... 
doi:10.1038/nature09714 pmid:21179085 pmcid:PMC3073090 fatcat:uuvaailolbc5bdyayhviqtwrji

Hypothalamic Tanycytes: A Key Component of Brain–Endocrine Interaction

E RODRIGUEZ, J BLAZQUEZ, F PASTOR, B PELAEZ, P PENA, B PERUZZO, P AMAT
2005 International Review of Cytology  
as transforming growth factors, prostaglandin E 2 , and the specific protein P85; and proteins of the endocytic pathways.  ...  These subtypes express differentially important functional molecules, such as glucose and glutamate transporters; a series of receptors for neuropeptide and peripheral hormones; secretory molecules such  ...  (From Berger and Hediger, 2001. ) (E) Rat medial basal hypothalamus: Immunocytochemistry for GLUT-1.  ... 
doi:10.1016/s0074-7696(05)47003-5 pmid:16344112 fatcat:ojps2p7mkbh6basysdtvqvqbn4

2017 ICCV Challenge: Detecting Symmetry in the Wild

Christopher Funk, Seungkyu Lee, Martin R. Oswald, Stavros Tsogkas, Wei Shen, Andrea Cohen, Sven Dickinson, Yanxi Liu
2017 2017 IEEE International Conference on Computer Vision Workshops (ICCVW)  
we also expand the types of symmetries to include densely-distributed and medial-axis-like symmetries; furthermore, we establish a challenge-and-paper dual track mechanism where both algorithms and articles  ...  We also offer a short survey of the paper-track submissions accepted for our 2017 symmetry challenge.  ...  A special thanks to Microsoft for sponsering our 2017 Symmetry Challenge Cash awards.  ... 
doi:10.1109/iccvw.2017.198 dblp:conf/iccvw/FunkLOTSCDL17 fatcat:jbj2fad3rrbcrl2spcdzn2gwl4

Inescapable but not escapable stress leads to increased struggling behavior and basolateral amygdala c-fos gene expression in response to subsequent novel stress challenge

M.S. Weinberg, N. Grissom, E. Paul, S. Bhatnagar, S.F. Maier, R.L. Spencer
2010 Neuroscience  
Restraintinduced c-fos expression in the medial prefrontal cortex, a brain area critical for mediating some of the differential neurochemical and behavioral effects of ES and IS, was surprisingly similar  ...  We compared the effects of escapable (ES) and yoked inescapable (IS) electric tail shocks on the hypothalamic-pituitaryadrenal (HPA) axis hormonal (corticosterone and adrenocorticotropic hormone (ACTH)  ...  Plasma ACTH and CORT values were log [10] transformed for analysis.  ... 
doi:10.1016/j.neuroscience.2010.06.052 pmid:20600641 pmcid:PMC2926237 fatcat:vy5nf4ovmzeqlmjtjnifbnuyem

DeepFlux for Skeletons in the Wild [article]

Yukang Wang, Yongchao Xu, Stavros Tsogkas, Xiang Bai, Sven Dickinson, Kaleem Siddiqi
2018 arXiv   pre-print
Computing object skeletons in natural images is challenging, owing to large variations in object appearance and scale, and the complexity of handling background clutter.  ...  We evaluate the proposed method on three benchmark datasets for skeleton detection and two for symmetry detection, achieving consistently superior performance over state-of-the-art methods.  ...  A novel definition of an appearance medial axis transform (AMAT) has been proposed in [44] , to detect symmetry in the wild in a purely bottom up, unsupervised fashion.  ... 
arXiv:1811.12608v1 fatcat:pahjsjqtfbhzbmaawn4yd3ktxq

Glucose metabolic changes in the prefrontal cortex are associated with HPA axis response to a psychosocial stressor

Simone Kern, Terrence R. Oakes, Charles K. Stone, Emelia M. McAuliff, Clemens Kirschbaum, Richard J. Davidson
2008 Psychoneuroendocrinology  
The prefrontal cortex (PFC) has been well known for its role in higher order cognition, affect regulation and social reasoning.  ...  Metabolic glucose rate in the rostral medial PFC (mPFC) (Brodman area (BA) 9 and BA 10) was negatively associated with stress-induced salivary cortisol increases.  ...  We would like to thank the Düsseldorf Entrepreneur Foundation for supporting this work through their Ph.D. fellowship program.  ... 
doi:10.1016/j.psyneuen.2008.01.010 pmid:18337016 pmcid:PMC2601562 fatcat:lsq3kbzpnjamljtmuxhi45erkm

Reading Intermediality: Lorca's Viaje a la luna ("Journey to the Moon," 1929) and Un chien andalou (Buñuel/Dalí, 1929)

Paul Julian Smith
2014 Modern Languages Open  
On the screen there is no nature morte. Objects have attitudes', García Abad 39.)  ...  Viaje a la luna is very different, and its radical disruptions cannot be explained by its more recent production, as Amat faithfully reproduces Lorca's sequence of images. A circle (moon?)  ... 
doi:10.3828/mlo.v0i1.4 fatcat:z3nssqkthrgznj7sk7dlo6tlpu

Physiology of Astigmatism [chapter]

Seyed-Farzad Mohammadi, Maryam Tahvildari, Hadi Z-Mehrjardi
2012 Astigmatism - Optics, Physiology and Management  
Decreases in action of extraocular muscles, especially the medial rectus (Marin-Amat, 1956) , and vitreous syneresis and liquefaction may also contribute (Mehdizadeh, 2008) .  ...  Reports on the axis of astigmatism in infants are contradictory. According to Gullstrand, the natural form of the cornea is against the rule (Gullstrand 1962) .  ... 
doi:10.5772/18068 fatcat:rfkjrpjumvef7g4pt3wr2b4m7y

Influence of the stress hormone cortisol on fear conditioning in humans: Evidence for sex differences in the response of the prefrontal cortex

Rudolf Stark, Oliver T. Wolf, Katharina Tabbert, Sabine Kagerer, Mark Zimmermann, Peter Kirsch, Anne Schienle, Dieter Vaitl
2006 NeuroImage  
showed that cortisol reduced activity for the CS+ > CS− comparison in the anterior cingulate, the lateral orbitofrontal cortex and the medial prefrontal cortex in males.  ...  Results revealed that cortisol impaired electrodermal signs of learning (the first interval response) in males, while no conditioned SCRs emerged for the females independent of treatment. fMRI results  ...  Thus, our findings call for additional studies with female subjects. Here, oral contraceptive users should be compared to naturally cycling women.  ... 
doi:10.1016/j.neuroimage.2006.05.046 pmid:16839780 fatcat:7fqqkqb4nngjvjg4rperipdfle

Childhood stress, grown-up brain networks: corticolimbic correlates of threat-related early life stress and adult stress response

R. H. Kaiser, R. Clegg, F. Goer, P. Pechtel, M. Beltzer, G. Vitaliano, D. P. Olson, M. H. Teicher, D. A. Pizzagalli
2017 Psychological Medicine  
Notably, increased flexibility between the amygdala and rACC compensated for this static disruption, suggesting that more dynamic medial corticolimbic circuits might be key to restoring healthy stress  ...  these dimensions of corticolimbic dysfunction and acute stress response in adulthood.MethodsSeventy unmedicated women varying in history of threat-related ELS completed a functional magnetic resonance imaging  ...  Prior research showing that coordinated recruitment of limbic and medial prefrontal regions (including ACC) is crucial for adaptive stress response (Amat et al. 2005) and cognitive regulation (Davies  ... 
doi:10.1017/s0033291717002628 pmid:28942738 fatcat:3cp5yziujncsdectc6o2l5hb5y

Depression of Excitatory Synapses onto Parvalbumin Interneurons in the Medial Prefrontal Cortex in Susceptibility to Stress

Z. Perova, K. Delevich, B. Li
2015 Journal of Neuroscience  
The prefrontal cortex (PFC) is required for coping with stress, and PFC dysfunction has been implicated in stress-related mental disorders, including depression.  ...  Here, we investigate the role of parvalbumin (PV) interneurons in the medial PFC (mPFC) in shaping behavioral responses to stress induced by the learned helplessness procedure, in which animals are subjected  ...  All data were tested for normality with the Shapiro-Wilk normality test and for homogeneity of variances with the Fligner-Killen test, and log-transformed when necessary to fulfill ANOVA assumptions.  ... 
doi:10.1523/jneurosci.2670-14.2015 pmid:25698754 pmcid:PMC4331634 fatcat:urld654yuzbtbllzujdd453ouy

Behavioral Interpretations of Intrinsic Connectivity Networks

Angela R. Laird, P. Mickle Fox, Simon B. Eickhoff, Jessica A. Turner, Kimberly L. Ray, D. Reese McKay, David C. Glahn, Christian F. Beckmann, Stephen M. Smith, Peter T. Fox
2011 Journal of Cognitive Neuroscience  
Our results serve as a resource for functional interpretations of brain networks in resting state studies and future investigations into mental operations and the tasks that drive them. ■  ...  presented to the subject; for Step 1: Peak coordinates in BrainMap were smoothed (12 mm FWHM) to generate 8637 modeled activation images.  ...  In the present study, coordinates were analyzed in Talairach space; conversions between spaces were carried out using the Lancaster transform Lancaster et al., 2007) .  ... 
doi:10.1162/jocn_a_00077 pmid:21671731 pmcid:PMC3690655 fatcat:rqk4n23zqrapfchlqheuse3uai
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