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Acquiring accurate external respiratory data during functional Magnetic Resonance Imaging (fMRI) is challenging, prompting the exploration of machine learning methods to estimate respiratory variation (RV) from fMRI data. Respiration…

Image and Video Processing · Electrical Eng. & Systems 2024-10-29 Abdoljalil Addeh , G. Bruce Pike , M. Ethan MacDonald

This paper is concerned with the problem of continuous-time nonlinear filtering for stochastic processes on a connected matrix Lie group. The main contribution of this paper is to derive the feedback particle filter (FPF) algorithm for this…

Optimization and Control · Mathematics 2017-01-11 Chi Zhang , Amirhossein Taghvaei , Prashant G. Mehta

Human motion synthesis is a fundamental task in computer animation. Recent methods based on diffusion models or GPT structure demonstrate commendable performance but exhibit drawbacks in terms of slow sampling speeds and error accumulation.…

Computer Vision and Pattern Recognition · Computer Science 2023-12-15 Vincent Tao Hu , Wenzhe Yin , Pingchuan Ma , Yunlu Chen , Basura Fernando , Yuki M Asano , Efstratios Gavves , Pascal Mettes , Bjorn Ommer , Cees G. M. Snoek

Dense and versatile image representations underpin the success of virtually all computer vision applications. However, state-of-the-art networks, such as transformers, produce low-resolution feature grids, which are suboptimal for dense…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Nikita Araslanov , Anna Sonnweber , Daniel Cremers

Common image editing tasks typically adopt powerful generative diffusion models as the leading paradigm for real-world content editing. Meanwhile, although reinforcement learning (RL) methods such as Diffusion-DPO and Flow-GRPO have further…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Fan Li , Chonghuinan Wang , Lina Lei , Yuping Qiu , Jiaqi Xu , Jiaxiu Jiang , Xinran Qin , Zhikai Chen , Fenglong Song , Zhixin Wang , Renjing Pei , Wangmeng Zuo

Traditional tracking-by-detection systems typically employ Kalman filters (KF) for state estimation. However, the KF requires domain-specific design choices and it is ill-suited to handling non-linear motion patterns. To address these…

Computer Vision and Pattern Recognition · Computer Science 2024-12-20 Momir Adžemović , Predrag Tadić , Andrija Petrović , Mladen Nikolić

The rapid progress in deep generative models has led to the creation of incredibly realistic synthetic images that are becoming increasingly difficult to distinguish from real-world data. The widespread use of Variational Models, Diffusion…

Computer Vision and Pattern Recognition · Computer Science 2025-01-13 Anant Mehta , Bryant McArthur , Nagarjuna Kolloju , Zhengzhong Tu

We propose a ``half'' layer of hidden units that has some of its weights randomly set and some of them trained. A half unit is composed of two stages: First, it takes a weighted sum of its inputs with fixed random weights, and second, the…

Machine Learning · Computer Science 2025-06-06 Ethem Alpaydin

Despite the fact that neural networks are widely used for speech-driven head motion synthesis, it is well-known that the output of neural networks is noisy or discontinuous due to the limited capability of deep neural networks in predicting…

Signal Processing · Electrical Eng. & Systems 2019-07-26 JinHong Lu , Hiroshi Shimodaira

The Forward-Forward (FF) algorithm presents a compelling, bio-inspired alternative to backpropagation. However, while efficient in training, it has a computationally prohibitive inference process that requires a separate forward pass for…

Machine Learning · Computer Science 2026-05-04 Shalini Sarode , Brian Moser , Joachim Folz , Federico Raue , Tobias Nauen , Stanislav Frolov , Andreas Dengel

Recent advances in video diffusion models have enabled realistic and controllable human image animation with temporal coherence. Although generating reasonable results, existing methods often overlook the need for regional supervision in…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Zhongcong Xu , Chaoyue Song , Guoxian Song , Jianfeng Zhang , Jun Hao Liew , Hongyi Xu , You Xie , Linjie Luo , Guosheng Lin , Jiashi Feng , Mike Zheng Shou

Fine-tuning is widely applied in image classification tasks as a transfer learning approach. It re-uses the knowledge from a source task to learn and obtain a high performance in target tasks. Fine-tuning is able to alleviate the challenge…

Computer Vision and Pattern Recognition · Computer Science 2022-07-27 Xuyang Shen , Jo Plested , Sabrina Caldwell , Yiran Zhong , Tom Gedeon

Rectified Flow text-to-image models surpass diffusion models in image quality and text alignment, but adapting ReFlow for real-image editing remains challenging. We propose a new real-image editing method for ReFlow by analyzing the…

Computer Vision and Pattern Recognition · Computer Science 2025-07-03 Jimyeong Kim , Jungwon Park , Yeji Song , Nojun Kwak , Wonjong Rhee

This paper presents an enhanced adaptive random Fourier features (ARFF) training algorithm for shallow neural networks, building upon the work introduced in "Adaptive Random Fourier Features with Metropolis Sampling", Kammonen et al.,…

Machine Learning · Computer Science 2025-05-01 Aku Kammonen , Anamika Pandey , Erik von Schwerin , Raúl Tempone

The matched filter (MF) is widely used to detect signals hidden within the noise. If the noise is Gaussian, its performances are well-known and describable in an elegant analytical form. The treatment of non-Gaussian noises is often…

Instrumentation and Methods for Astrophysics · Physics 2018-08-08 Roberto Vio , Paola Andreani

In recent work it is shown that importance sampling can be avoided in the particle filter through an innovation structure inspired by traditional nonlinear filtering combined with Mean-Field Game formalisms. The resulting feedback particle…

Numerical Analysis · Mathematics 2016-11-18 Tao Yang , Richard S. Laugesen , Prashant G. Mehta , Sean P. Meyn

Feature pyramid network (FPN) has been an effective framework to extract multi-scale features in object detection. However, current FPN-based methods mostly suffer from the intrinsic flaw of channel reduction, which brings about the loss of…

Computer Vision and Pattern Recognition · Computer Science 2021-03-22 Yihao Luo , Xiang Cao , Juntao Zhang , Xiang Cao , Jingjuan Guo , Haibo Shen , Tianjiang Wang , Qi Feng

We propose a neural network model to estimate the current frame from two reference frames, using affine transformation and adaptive spatially-varying filters. The estimated affine transformation allows for using shorter filters compared to…

Image and Video Processing · Electrical Eng. & Systems 2021-02-18 Hyomin Choi , Ivan V. Bajić

Drone-camera based human activity recognition (HAR) has received significant attention from the computer vision research community in the past few years. A robust and efficient HAR system has a pivotal role in fields like video…

Computer Vision and Pattern Recognition · Computer Science 2022-11-11 Santosh Kumar Yadav , Esha Pahwa , Achleshwar Luthra , Kamlesh Tiwari , Hari Mohan Pandey , Peter Corcoran

Deep neural networks have enabled progress in a wide variety of applications. Growing the size of the neural network typically results in improved accuracy. As model sizes grow, the memory and compute requirements for training these models…