Results 91 to 100 of about 251,998 (281)

Combining Convolutional Neural Network and Markov Random Field for Semantic Image Retrieval

open access: yesAdvances in Multimedia, 2018
With the rapidly growing number of images over the Internet, efficient scalable semantic image retrieval becomes increasingly important. This paper presents a novel approach for semantic image retrieval by combining Convolutional Neural Network (CNN) and
Haijiao Xu   +4 more
doaj   +1 more source

Bayesian segmentation of hyperspectral images

open access: yes, 2007
In this paper we consider the problem of joint segmentation of hyperspectral images in the Bayesian framework. The proposed approach is based on a Hidden Markov Modeling (HMM) of the images with common segmentation, or equivalently with common hidden ...
Féron, Olivier   +2 more
core   +1 more source

Which graphical models are difficult to learn? [PDF]

open access: yes, 2009
We consider the problem of learning the structure of Ising models (pairwise binary Markov random fields) from i.i.d. samples. While several methods have been proposed to accomplish this task, their relative merits and limitations remain somewhat obscure.
Bento, Jose, Montanari, Andrea
core   +2 more sources

Restricted Tweedie stochastic block models

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract The stochastic block model (SBM) is a widely used framework for community detection in networks, where the network structure is typically represented by an adjacency matrix. However, conventional SBMs are not directly applicable to an adjacency matrix that consists of nonnegative zero‐inflated continuous edge weights.
Jie Jian, Mu Zhu, Peijun Sang
wiley   +1 more source

Some Shannon-McMillan Approximation Theorems for Markov Chain Field on the Generalized Bethe Tree

open access: yesJournal of Inequalities and Applications, 2011
A class of small-deviation theorems for the relative entropy densities of arbitrary random field on the generalized Bethe tree are discussed by comparing the arbitrary measure with the Markov measure on the generalized Bethe tree.
Zong Decai, Wang Kangkang
doaj  

Hidden Markov graphical models with state‐dependent generalized hyperbolic distributions

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract In this article, we develop a novel hidden Markov graphical model to investigate time‐varying interconnectedness between different financial markets. To identify conditional correlation structures under varying market conditions and accommodate shape features embedded in financial time series, we rely upon the generalized hyperbolic family of ...
Beatrice Foroni   +2 more
wiley   +1 more source

Relaxations for inference in restricted Boltzmann machines [PDF]

open access: yes, 2014
We propose a relaxation-based approximate inference algorithm that samples near-MAP configurations of a binary pairwise Markov random field. We experiment on MAP inference tasks in several restricted Boltzmann machines. We also use our underlying sampler
Frostig, Roy   +3 more
core  

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