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This paper presents an efficient feature-based approach to initialize non-linear image registration. Today, nonlinear image registration is dominated by methods relying on intensity-based similarity measures. A good estimate of the initial…

Computer Vision and Pattern Recognition · Computer Science 2024-07-10 Antoine Legouhy , Ross Callaghan , Hojjat Azadbakht , Hui Zhang

Random Fourier Features (RFF) demonstrate wellappreciated performance in kernel approximation for largescale situations but restrict kernels to be stationary and positive definite. And for non-stationary kernels, the corresponding RFF could…

Machine Learning · Statistics 2021-04-15 Qin Luo , Kun Fang , Jie Yang , Xiaolin Huang

We present a novel method for efficiently producing semi-dense matches across images. Previous detector-free matcher LoFTR has shown remarkable matching capability in handling large-viewpoint change and texture-poor scenarios but suffers…

Computer Vision and Pattern Recognition · Computer Science 2024-03-13 Yifan Wang , Xingyi He , Sida Peng , Dongli Tan , Xiaowei Zhou

The standard approach to unconstrained face recognition in natural photographs is via a detection, alignment, recognition pipeline. While that approach has achieved impressive results, there are several reasons to be dissatisfied with it,…

Computer Vision and Pattern Recognition · Computer Science 2014-03-27 Qianli Liao , Joel Z Leibo , Youssef Mroueh , Tomaso Poggio

Cascaded Regression (CR) based methods have been proposed to solve facial landmarks detection problem, which learn a series of descent directions by multiple cascaded regressors separately trained in coarse and fine stages. They outperform…

Computer Vision and Pattern Recognition · Computer Science 2018-03-20 Tao Hu , Honggang Qi , Jizheng Xu , Qingming Huang

The accurate estimation of six degrees-of-freedom (6DoF) object poses is essential for many applications in robotics and augmented reality. However, existing methods for 6DoF pose estimation often depend on CAD templates or dense support…

Computer Vision and Pattern Recognition · Computer Science 2023-06-14 Panwang Pan , Zhiwen Fan , Brandon Y. Feng , Peihao Wang , Chenxin Li , Zhangyang Wang

While deep learning models like Vision Transformer (ViT) have achieved significant advances, they typically require large datasets. With data privacy regulations, access to many original datasets is restricted, especially medical images.…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Xinyuan Zhao , Yihang Wu , Ahmad Chaddad , Tareef Daqqaq , Reem Kateb

We propose a federated algorithm for reconstructing images using multimodal tomographic data sourced from dispersed locations, addressing the challenges of traditional unimodal approaches that are prone to noise and reduced image quality.…

Optimization and Control · Mathematics 2025-01-13 Geunyeong Byeon , Minseok Ryu , Zichao Wendy Di , Kibaek Kim

A cascaded iterative Fourier transform (CIFT) algorithm is presented for optical security applications. Two phase-masks are designed and located in the input and the Fourier domains of a 4-f correlator respectively, in order to implement…

Optics · Physics 2009-11-10 Guohai Situ , Jingjuan Zhang

The contributions of this thesis stem from technology developed to analyse large sets of volumetric images in terms of atom-like features extracted in 3D image space, following SIFT algorithm in 2D image space. New feature properties are…

Image and Video Processing · Electrical Eng. & Systems 2022-08-29 Laurent Chauvin

In this paper, we propose a method to apply the popular cascade classifier into face recognition to improve the computational efficiency while keeping high recognition rate. In large scale face recognition systems, because the probability…

Computer Vision and Pattern Recognition · Computer Science 2013-03-01 Dong Yi , Zhen Lei , Yang Hu , Stan Z. Li

We show how the interface curvature autocorrelation function (ICAF) and associated structure factor (ICSF), of relevance in non-equilibrium pattern-formation problems where sharp interfaces are present, provide new and interesting…

Statistical Mechanics · Physics 2009-10-31 Oliver Schoenborn , Rashmi C. Desai

Learning based 6D object pose estimation methods rely on computing large intermediate pose representations and/or iteratively refining an initial estimation with a slow render-compare pipeline. This paper introduces a novel method we call…

Computer Vision and Pattern Recognition · Computer Science 2022-10-24 Pedro Castro , Tae-Kyun Kim

In the realm of Federated Learning (FL) applied to remote sensing image classification, this study introduces and assesses several innovative communication strategies. Our exploration includes feature-centric communication, pseudo-weight…

Computer Vision and Pattern Recognition · Computer Science 2024-05-24 Anh-Kiet Duong , Hoàng-Ân Lê , Minh-Tan Pham

Compression-based similarity measures are effectively employed in applications on diverse data types with a basically parameter-free approach. Nevertheless, there are problems in applying these techniques to medium-to-large datasets which…

Machine Learning · Statistics 2012-10-03 Daniele Cerra , Mihai Datcu

The rapid advancement of face forgery techniques has introduced a growing variety of forgeries. Incremental Face Forgery Detection (IFFD), involving gradually adding new forgery data to fine-tune the previously trained model, has been…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 Jikang Cheng , Zhiyuan Yan , Ying Zhang , Li Hao , Jiaxin Ai , Qin Zou , Chen Li , Zhongyuan Wang

Induced magnetic field (IMF)-based localization offers a robust alternative to wave-based positioning technologies due to its resilience to non-line-of-sight conditions, environmental dynamics, and wireless interference. However, existing…

Signal Processing · Electrical Eng. & Systems 2026-02-03 Qiushi Guo , Matthias Tschoepe , Mengxi Liu , Sizhen Bian , Paul Lukowicz

There have been tremendous improvements for facial landmark detection on general "in-the-wild" images. However, it is still challenging to detect the facial landmarks on images with severe occlusion and images with large head poses (e.g.…

Computer Vision and Pattern Recognition · Computer Science 2017-09-26 Yue Wu , Qiang Ji

We propose Power Slow Feature Analysis, a gradient-based method to extract temporally slow features from a high-dimensional input stream that varies on a faster time-scale, as a variant of Slow Feature Analysis (SFA) that allows end-to-end…

Machine Learning · Computer Science 2019-07-19 Merlin Schüler , Hlynur Davíð Hlynsson , Laurenz Wiskott

This paper presents a novel automatic face recognition approach based on local binary patterns. This descriptor considers a local neighbourhood of a pixel to compute the feature vector values. This method is not very robust to handle image…

Computer Vision and Pattern Recognition · Computer Science 2018-06-18 Pavel Král , Ladislav Lenc , Antonín Vrba