Results 21 to 30 of about 97,608 (251)

Fast Symmetric Diffeomorphic Image Registration with Convolutional Neural Networks [PDF]

Computer Vision and Pattern Recognition, 2020
Diffeomorphic deformable image registration is crucial in many medical image studies, as it offers unique, special features including topology preservation and invertibility of the transformation.
Tony C. W. Mok, Albert C. S. Chung
semanticscholar   +1 more source

Low-Light Enhancement Model in Natural Scenes Based on Generative Adversarial Network [PDF]

Jisuanji gongcheng
In the most current low-light image enhancement models, both illumination enhancement and original image feature preservation are difficult to achieve and hard to adapt to a variety of different low-light conditions in natural scenes.To address these ...
Ruijun YANG, Jinjing QIN, Yan CHENG
doaj   +1 more source

Regularity and blow up for active scalars [PDF]

, 2010
We review some recent results for a class of fluid mechanics equations called active scalars, with fractional dissipation. Our main examples are the surface quasi-geostrophic equation, the Burgers equation, and the Cordoba-Cordoba-Fontelos model.
Kiselev, Alexander
core   +2 more sources

A Novel Euler's Elastica based Segmentation Approach for Noisy Images via using the Progressive Hedging Algorithm [PDF]

, 2019
Euler's Elastica based unsupervised segmentation models have strong capability of completing the missing boundaries for existing objects in a clean image, but they are not working well for noisy images.
Li, Ling, Liu, Wanquan, Sun, Jie, Tan, Lu, Zhang, Min   +4 more
core   +2 more sources

Approximation by Symmetrized and Perturbed Hyperbolic Tangent Activated Convolution-Type Operators

Mathematics
In this article, for the first time, the univariate symmetrized and perturbed hyperbolic tangent activated convolution-type operators of three kinds are introduced.
George A. Anastassiou
doaj   +1 more source

Area preservation in computational fluid dynamics

, 1999
Incompressible two-dimensional flows such as the advection (Liouville) equation and the Euler equations have a large family of conservation laws related to conservation of area.
Arakawa, Lax, Marsden, Robert I. McLachlan, Scovel, Zeitlin   +5 more
core   +2 more sources

Direct model fitting to combine dithered ACS images [PDF]

, 2013
The information lost in images of undersampled CCD cameras can be recovered with the technique of `dithering'. A number of subexposures is taken with sub-pixel shifts in order to record structures on scales smaller than a pixel.
Mahmoudian, Haniyeh, Wucknitz, Olaf
core   +2 more sources

Multivariate Approximation Using Symmetrized and Perturbed Hyperbolic Tangent-Activated Multidimensional Convolution-Type Operators

Axioms
In this article, we introduce, for the first time, multivariate symmetrized and perturbed hyperbolic tangent-activated convolution-type operators in three forms.
George A. Anastassiou
doaj   +1 more source

Nonrigid Optical Flow Ground Truth for Real-World Scenes with Time-Varying Shading Effects

, 2016
In this paper we present a dense ground truth dataset of nonrigidly deforming real-world scenes. Our dataset contains both long and short video sequences, and enables the quantitatively evaluation for RGB based tracking and registration methods.
Brown, Matthew, Cosker, Darren, Li, Wenbin, Lv, Zhihan   +3 more
core   +1 more source

Transformation of the second order modulus by positive linear operators

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
We obtain estimates for the transformation of the second order modulus of continuity by positive linear operators which satisfy certain conditions, which are common to a large class of approximation operators.
Pǎltǎnea Radu, Stan Gabriel
doaj   +1 more source