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A-Contrario Horizon-First Vanishing Point Detection Using Second-Order Grouping Laws [chapter]

Gilles Simon, Antoine Fond, Marie-Odile Berger
2018 Lecture Notes in Computer Science  
We show that, in images of man-made environments, the horizon line can usually be hypothesized based on a-contrario detections of second-order grouping events.  ...  Experiments made on three datasets show that our method, not only achieves state-of-the-art performance w.r.t. horizon line detection on two datasets, but also yields much less spurious vanishing points  ...  More specifically, as a 2-D line segment (LS) is in itself a gestalt (grouping of aligned points), a VP is qualified as a second-order gestalt [3] .  ... 
doi:10.1007/978-3-030-01249-6_20 fatcat:oslydzw5pfawznkw565olxqw64

Jan van Eyck's Perspectival System Elucidated Through Computer Vision

Gilles Simon
2021 Proceedings of the ACM on Computer Graphics and Interactive Techniques  
However, an a-contrario analysis of the vanishing points in five of his paintings, realized between 1432 and 1439, unveils a recurring fishbone-like pattern that could only emerge from the use of a polyscopic  ...  A 3D reconstruction of Arnolfini Portrait compliant with this pattern suggests that van Eyck's device answered a both aesthetic and scientific questioning on how to represent space as closely as possible  ...  In order to distinguish between the references of the Supplementary Material and those of the main text (some of which are also cited in the Supplementary Material) the first are preceded by the letter  ... 
doi:10.1145/3465623 fatcat:jvhncri7sndvjbkmj26im3uhzy

Toward an Epistemology of Blindness Why the New Forms of `Ceremonial Adequacy' neither Regulate nor Emancipate

Boaventura de Sousa Santos
2001 European Journal of Social Theory  
My starting point in this paper is the artistic structures of the Renaissance.  ...  Leon Battista Alberti (1404-1472) is considered the founder of one-point perspective in Renaissance painting, even though the mathematical laws of perspective were formulated for the first time by the  ...  The illusion is real on the condition that the painting be seen from a predetermined and rigidly fixed point of view. 4 If the spectator changes position, the illusion of reality vanishes.  ... 
doi:10.1177/13684310122225109 fatcat:ohmlxphn5rfxphoraet5mgthaq

Quantum Effects in Cosmology [article]

Emmanuel Frion
2020 arXiv   pre-print
The main features of these models are the presence of a contraction phase before expansion, and a never-vanishing scale factor.  ...  This thesis focuses on a Hamiltonian formulation of quantum effects in cosmology. We first explore stochastic perturbations in a collapsing universe.  ...  the second exponential term since the first one will grow much quicker.  ... 
arXiv:2010.03462v1 fatcat:rix7jkhouneclkyibazceg6wuq

The Gravity of Classical Fields: And Its Effect on the Dynamics of Gravitational Systems [article]

Rodrigo Vicente
2021 arXiv   pre-print
It also depicts dark matter depletion as a reaction to an inspiralling binary within a dark matter core.  ...  Our setup can also efficiently describe the interaction between a moving massive black hole and the surrounding environment.  ...  2 Φ -using only the first order fluctuation δΦ.  ... 
arXiv:2110.07620v1 fatcat:qafenofylzhvznixgn2uxxypdi

Populism in Western Democracies: A View from France

Bernard Boëne
2020 Security Dialogues. Journal in the field of Security, Defence and Peace Studies  
Drawing upon the extensive literature on populism that has accumulated since the 1960s, this article first tries to characterize contemporary Western populist movements.  ...  Having identified "civic" nuances among populist currents of the Left as well as of the Right, and in between them a moderate populist vote expressing disenchantment with government parties, it hypothesizes  ...  To cover themselves, they use law and worthy sentiments as fig leaves they end up abusing.  ... 
doi:10.47054/sd2010017b fatcat:ge5ks5sizvc3nelxmqvev7bs3e

Eduentretenimiento y comunicación para el desarrollo y el cambio social en la infancia. Una revisión de literatura

Solyenitzin Bravo Ponce
2021 Caleidoscopio - Revista Semestral de Ciencias Sociales y Humanidades  
objetivo de esta revisión de literatura es identificar los hallazgos y lagunas en el uso del entretenimiento como técnica de investigación desde la perspectiva de la CDCS, en particular, lo relativo a  ...  Another 300 million use it as a second language.  ...  Actually the first supports him in his struggle with the second, for the first wants to push him forward; and in the same way the second supports him in his struggle with the first; for the second of course  ... 
doi:10.33064/44crscsh2572 fatcat:c7iegwqnefcdvobp5hstoydjdy

Global Constitutionalism without Global Democracy (?)

Claudio Corradetti, Giovanni Sartor, Dimitri Van Den Meerssche, Aoife O'Donoghue, Pavlos Eleftheriadis, Maria Adele Carrai, Ernst-Ulrich Petersmann
2016 Social Science Research Network  
How is it possible to tame global constitutionalism in order to avoid a global Leviathan?  ...  Some scholars are convinced that this is a real problem since that a 'division of labour' is to be recognized between national and regional/international legal levels, only the first needing a democratic  ...  346 ; it provides a legal vanishing point for different chains of validity.  ... 
doi:10.2139/ssrn.2880469 fatcat:5fxg7h55fncebpqx4fs5qvujgu

Dark Matter Phenomenology: Sterile Neutrino Portal and Gravitational Portal in Extra-Dimensions [article]

Miguel G. Folgado
2021 arXiv   pre-print
Although we have many evidences of its existence, this new type of matter has not been detected yet. As a consequence, the landscape of the models that can explain the Dark Matter properties is huge.  ...  In the present work we propose and study several Dark Matter models, setting limits by using experimental results.  ...  In order to do this, we must first talk about the choice of the symmetry group. The description of the weak interactions was one of the great problems of the second half of the 20th century.  ... 
arXiv:2104.13442v1 fatcat:pzw6ermcrrhc5k2i3ihtl5xvpm

A Theoretical Perspective on Galaxy Clusters: Physical Properties of the Dark Matter and Baryons [article]

Y. Ascasibar
2003 arXiv   pre-print
Clusters of galaxies are studied from a theoretical point of view, comparing with observational results whenever possible.  ...  Star formation is severely reduced in the inner regions of clusters, due to the fact that infalling galaxies loose their hot gas reservoirs during the first orbit.  ...  These authors point out that the slope of the power-law fits can be biased by a few points at one end.  ... 
arXiv:astro-ph/0305250v1 fatcat:j3xsvd3khfbghkfbeuhl7yewh4

Machine-Learning Techniques [chapter]

Rob Sullivan
2011 Introduction to Data Mining for the Life Sciences  
In particular, we will consider a number of Artificial Neural Networks models and will see how they may exhibit different properties (capacity, convergence and stability) depending on their topology, learning  ...  The tutorial and exercises that will accompany the class with revolve around a number of realworld applications of Machine Learning, namely, for visual processing (face recognition, object recognition)  ...  The first eigenvector having the largest eigenvalue points to the direction of largest variance (the longest axis of the ellipse) whereas the second eigenvector is orthogonal to the first one (pointing  ... 
doi:10.1007/978-1-59745-290-8_8 fatcat:svpyv2kctzfgthsu3t5rsc575u

Machine Learning Techniques [chapter]

1999 Artificial Intelligence and Soft Computing  
In particular, we will consider a number of Artificial Neural Networks models and will see how they may exhibit different properties (capacity, convergence and stability) depending on their topology, learning  ...  The tutorial and exercises that will accompany the class with revolve around a number of realworld applications of Machine Learning, namely, for visual processing (face recognition, object recognition)  ...  The first eigenvector having the largest eigenvalue points to the direction of largest variance (the longest axis of the ellipse) whereas the second eigenvector is orthogonal to the first one (pointing  ... 
doi:10.1201/9781420049138.ch13 fatcat:x2jy7krtejaq3idi4uhb6wi6we

The Literary field of twentieth-century China

2000 ChoiceReviews  
The editors see them as part of a political, economic, social, and cultural continuum that spans the Chinese mainland, Taiwan, Hong Kong, Macau, South-East Asia, and the world.  ...  A number of points made by Drege are useful to repeat in the present context.  ...  Although it is not a sine qua non condition, a group is in praxis the first step towards a school.  ... 
doi:10.5860/choice.37-3212 fatcat:um67ghzda5cdvpseicdfm3ut5q

Luther and the Reform of Marriage and Family Life

YOUNGCHUN CHO
2017 UNIO CUM CHRISTO  
Abstract: Martin Luther was a reformer not only of Christian doctrines and church practices, but also of marriage and family life.  ...  This article investigates how Luther transformed the medieval concept of marriage and reconstructed family life as a sacred sphere in which the believer can exercise faith and Christian duties coram Deo  ...  do not conflict with the First and Second Laws."  ... 
doi:10.35285/ucc3.1.2017.art9 fatcat:spzwhard2jgcbijgbdmgre3k34

Ars Artium, Vol 3, January 2015

Vijay Kumar Roy
2017 Zenodo  
Ars Artium is an international research journal of humanities and social sciences that aims at providing a forum for teachers and researchers for publishing quality research papers in the fields of English  ...  Venice is shown as a place of order, law and good government contrary to the East which is considered lacking in these civilised things.  ...  First of all, he turns Bombay's change of name to Mumbai into a theme. Second, Jehangir Chenoy, so that he can really feel English.  ... 
doi:10.5281/zenodo.1040955 fatcat:pxj76rbehfc3jigzy7z7xwwxii
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