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We consider two kinds of stochastic volatility models. Both kinds of models contain a stationary volatility process, the density of which, at a fixed instant in time, we aim to estimate. We discuss discrete time models where for instance a…

Statistics Theory · Mathematics 2014-07-15 Bert van Es , Peter Spreij , Harry van Zanten

The estimation of viewpoints and keypoints effectively enhance object detection methods by extracting valuable traits of the object instances. While the output of both processes differ, i.e., angles vs. list of characteristic points, they…

Computer Vision and Pattern Recognition · Computer Science 2019-12-16 Pau Panareda Busto , Juergen Gall

The primary aim of this manuscript is to underscore a significant limitation in current deep learning models, particularly vision models. Unlike human vision, which efficiently selects only the essential visual areas for further processing,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-25 Ali Borji

In computer vision tasks, the ability to focus on relevant regions within an image is crucial for improving model performance, particularly when key features are small, subtle, or spatially dispersed. Convolutional neural networks (CNNs)…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Mahmudul Hasan

Attention mechanisms have been extensively employed in various applications, including time series modeling, owing to their capacity to capture intricate dependencies; however, their utility is often constrained by quadratic computational…

Machine Learning · Computer Science 2025-11-06 Mingtao Zhang , Guoli Yang , Zhanxing Zhu , Mengzhu Wang , Xiaoying Bai

A substantial body of research has focused on developing systems that assist medical professionals during labor-intensive early screening processes, many based on convolutional deep-learning architectures. Recently, multiple studies…

Computer Vision and Pattern Recognition · Computer Science 2024-04-19 Tristan Piater , Niklas Penzel , Gideon Stein , Joachim Denzler

In this paper, we use fully convolutional neural networks for the semantic segmentation of eye tracking data. We also use these networks for reconstruction, and in conjunction with a variational auto-encoder to generate eye movement data.…

Computer Vision and Pattern Recognition · Computer Science 2021-01-19 Wolfgang Fuhl , Yao Rong , Enkelejda Kasneci

Non-intrusive, real-time analysis of the dynamics of the eye region allows us to monitor humans' visual attention allocation and estimate their mental state during the performance of real-world tasks, which can potentially benefit a wide…

Human-Computer Interaction · Computer Science 2023-06-28 Li Ding , Jack Terwilliger , Aishni Parab , Meng Wang , Lex Fridman , Bruce Mehler , Bryan Reimer

The eye fixation patterns of human observers are a fundamental indicator of the aspects of an image to which humans attend. Thus, manipulating fixation patterns to guide human attention is an exciting challenge in digital image processing.…

Computer Vision and Pattern Recognition · Computer Science 2017-12-19 Leon A. Gatys , Matthias Kümmerer , Thomas S. A. Wallis , Matthias Bethge

We revisit the problem of model-based object recognition for intensity images and attempt to address some of the shortcomings of existing Bayesian methods, such as unsuitable priors and the treatment of residuals with a non-robust error…

Computer Vision and Pattern Recognition · Computer Science 2010-12-14 Vasileios Zografos , Bernard Buxton

Within the framework of test-experiments, an original pointing set-up based on speed-induced deflection of a light-beam and using a high-resolution opto-electronic array as a position detector, is proposed. The device would provide a new…

General Physics · Physics 2007-05-23 G. Sardin

Feature selection procedures for spatial point processes parametric intensity estimation have been recently developed since more and more applications involve a large number of covariates. In this paper, we investigate the setting where the…

Methodology · Statistics 2017-12-29 Achmad Choiruddin , Jean-François Coeurjolly , Frédérique Letué

Convolution has been the core ingredient of modern neural networks, triggering the surge of deep learning in vision. In this work, we rethink the inherent principles of standard convolution for vision tasks, specifically spatial-agnostic…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Duo Li , Jie Hu , Changhu Wang , Xiangtai Li , Qi She , Lei Zhu , Tong Zhang , Qifeng Chen

This paper proposes a novel training model based on shape and appearance features for object segmentation in images and videos. Whereas most such models rely on two-dimensional appearance templates or a finite set of descriptors, our…

Computer Vision and Pattern Recognition · Computer Science 2021-04-01 Martin Mueller , Navdeep Dahiya , Anthony Yezzi

The puzzle of computer vision might find new challenging solutions when we realize that most successful methods are working at image level, which is remarkably more difficult than processing directly visual streams, just as happens in…

Computer Vision and Pattern Recognition · Computer Science 2018-07-18 Alessandro Betti , Marco Gori , Stefano Melacci

Point process modeling is gaining increasing attention, as point process type data are emerging in numerous scientific applications. In this article, motivated by a neuronal spike trains study, we propose a novel point process regression…

Methodology · Statistics 2020-12-10 Xiwei Tang , Lexin Li

We describe an image compression method, consisting of a nonlinear analysis transformation, a uniform quantizer, and a nonlinear synthesis transformation. The transforms are constructed in three successive stages of convolutional linear…

Computer Vision and Pattern Recognition · Computer Science 2020-07-28 Johannes Ballé , Valero Laparra , Eero P. Simoncelli

This paper presents a sparse Change-Based Convolutional Long Short-Term Memory (CB-ConvLSTM) model for event-based eye tracking, key for next-generation wearable healthcare technology such as AR/VR headsets. We leverage the benefits of…

Computer Vision and Pattern Recognition · Computer Science 2024-01-22 Qinyu Chen , Zuowen Wang , Shih-Chii Liu , Chang Gao

Stochastic volatility modelling of financial processes has become increasingly popular. The proposed models usually contain a stationary volatility process. We will motivate and review several nonparametric methods for estimation of the…

Methodology · Statistics 2014-07-15 Bert van Es , Peter Spreij , Harry van Zanten

Unsupervised learning from continuous visual streams is a challenging problem that cannot be naturally and efficiently managed in the classic batch-mode setting of computation. The information stream must be carefully processed accordingly…

Machine Learning · Computer Science 2020-06-17 Matteo Tiezzi , Stefano Melacci , Alessandro Betti , Marco Maggini , Marco Gori