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Results 11 - 20
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6,508
Learning the discriminative power-invariance trade-off
- IN ICCV
, 2007
"... We investigate the problem of learning optimal descriptors for a given classification task. Many hand-crafted descriptors have been proposed in the literature for measuring visual similarity. Looking past initial differences, what really distinguishes one descriptor from another is the tradeoff that ..."
Abstract
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Cited by 228 (4 self)
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is posed in the kernel learning framework. We learn the optimal, domain-specific kernel as a combination of base kernels corresponding to base features which achieve different levels of trade-off (such as no invariance, rotation invariance, scale invariance, affine invariance, etc.) This leads to a convex
Rotation, Entropy, and Equilibrium States
"... . For a dynamical system (X; T ) and function f : X ! R d we consider the corresponding generalised rotation set. We present a new approach to studying the entropy of rotation vectors in terms of equilibrium states. We relate this to the lost and directional ergodic measures and directional entro ..."
Abstract
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Cited by 2 (0 self)
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. For a dynamical system (X; T ) and function f : X ! R d we consider the corresponding generalised rotation set. We present a new approach to studying the entropy of rotation vectors in terms of equilibrium states. We relate this to the lost and directional ergodic measures and directional
Self-calibration from multiple views with a rotating camera
, 1994
"... Abstract. A newpractical method is given for the self-calibration of a camera. In this method, at least three images are taken from the same point in space with different orientations of the camera and calibration is computed from an analysis of point matches between the images. The method requires ..."
Abstract
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Cited by 177 (1 self)
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no knowledge of the orientations of the camera. Calibration is based on the image correspondences only. This method differs fundamentally from previous results by Maybank and Faugeras on selfcalibration using the epipolar structure of image pairs. In the method of this paper, there is no epipolar structure
Matching 3D Models with Shape Distributions
, 2001
"... Measuring the similarity between 3D shapes is a fundamental problem, with applications in computer vision, molecular biology, computer graphics, and a variety of other fields. A challenging aspect of this problem is to find a suitable shape signature that can be constructed and compared quickly, whi ..."
Abstract
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Cited by 215 (7 self)
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function measuring global geometric properties of an object. The primary motivation for this approach is to reduce the shape matching problem to the comparison of probability distributions, which is simpler than traditional shape matching methods that require pose registration, feature correspondence
As-rigid-as-possible shape interpolation
, 2000
"... We present an object-space morphing technique that blends the interiors of given two- or three-dimensional shapes rather than their boundaries. The morph is rigid in the sense that local volumes are least-distorting as they vary from their source to target configurations. Given a boundary vertex cor ..."
Abstract
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Cited by 188 (9 self)
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of the optimal simplex morphing and the appropriate definition of an error functional whose minimization defines the paths of the vertices. Each pair of corresponding simplices defines an affine transformation, which is factored into a rotation and a stretching transformation. These local transformations
Practical parameterization of rotations using the exponential map
- Journal of Graphics Tools
, 1998
"... Parameterizing three degree-of-freedom (DOF) rotations is difficult to do well. Many graphics applications demand that we be able to compute and differentiate positions and orientations of articulated figures with respect to their rotational (and other) parameters, as well as integrate differential ..."
Abstract
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Cited by 135 (2 self)
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equations, optimize functions of DOFs, and interpolate orientations. Widely used parameterizations such as Euler angles and quaternions are well suited to only a few of these operations. The exponential map maps a vector in R 3 describing the axis and magnitude of a three DOF rotation to the corresponding
A (2001) Mapping of contralateral space in retinotopic coordinates by a parietal cortical area in humans. Science 294
"... The internal organization of a higher level visual area in the human parietal cortex was mapped. Functional magnetic resonance images were acquired while the polar angle of a peripheral target for a delayed saccade was gradually changed. A region in the superior parietal cortex showed robust retinot ..."
Abstract
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Cited by 176 (7 self)
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retinotopic mapping of the remembered target angle. The map reversed when the direction of rotation of the remembered targets was reversed and persisted unchanged when study participants detected rare target reappearances while maintaining fixation, or when the eccentricity of successive remembered targets
Toric Geometry, Sasaki–Einstein Manifolds and a new Infinite Class of AdS/CFT duals
"... Recently an infinite family of explicit Sasaki–Einstein metrics Y p,q on S 2 × S 3 has been discovered, where p and q are two coprime positive integers, with q < p. These give rise to a corresponding family of Calabi–Yau cones, which moreover are toric. Aided by several recent results in toric ge ..."
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Cited by 173 (15 self)
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geometry, we show that these are Kähler quotients C 4 //U(1), namely the vacua of gauged linear sigma models with charges (p,p, −p + q, −p − q), thereby generalising the conifold, which is p = 1,q = 0. We present the corresponding toric diagrams and show that these may be embedded in the toric diagram
Correspondence to
, 2010
"... Flexible epidemiological model for estimates and short-term projections in generalised HIV/AIDS epidemics ..."
Abstract
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Flexible epidemiological model for estimates and short-term projections in generalised HIV/AIDS epidemics
Results 11 - 20
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