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Facial landmark localization plays an important role in face recognition and analysis applications. In this paper, we give a brief introduction to a coarse-to-fine pipeline with neural networks and sequential regression. First, a global…

Computer Vision and Pattern Recognition · Computer Science 2015-11-17 Zhiao Huang , Erjin Zhou , Zhimin Cao

In medical imaging, surface registration is extensively used for performing systematic comparisons between anatomical structures, with a prime example being the highly convoluted brain cortical surfaces. To obtain a meaningful registration,…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Yuchen Guo , Qiguang Chen , Gary P. T. Choi , Lok Ming Lui

We present deformable unsupervised medical image registration using a randomly-initialized deep convolutional neural network (CNN) as regularization prior. Conventional registration methods predict a transformation by minimizing…

Image and Video Processing · Electrical Eng. & Systems 2019-08-05 Max-Heinrich Laves , Sontje Ihler , Tobias Ortmaier

Surgical decisions are informed by aligning rapid portable 2D intraoperative images (e.g., X-rays) to a high-fidelity 3D preoperative reference scan (e.g., CT). 2D/3D image registration often fails in practice: conventional optimization…

Computer Vision and Pattern Recognition · Computer Science 2025-03-21 Vivek Gopalakrishnan , Neel Dey , Polina Golland

One of the fundamental challenges in supervised learning for multimodal image registration is the lack of ground-truth for voxel-level spatial correspondence. This work describes a method to infer voxel-level transformation from…

Recently, it was shown that excellent results can be achieved in both face landmark localization and pose-invariant face recognition. These breakthroughs are attributed to the efforts of the community to manually annotate facial images in…

Computer Vision and Pattern Recognition · Computer Science 2015-02-04 Christos Sagonas , Yannis Panagakis , Stefanos Zafeiriou , Maja Pantic

Face alignment is a classic problem in the computer vision field. Previous works mostly focus on sparse alignment with a limited number of facial landmark points, i.e., facial landmark detection. In this paper, for the first time, we aim at…

Computer Vision and Pattern Recognition · Computer Science 2017-09-06 Yaojie Liu , Amin Jourabloo , William Ren , Xiaoming Liu

Background: Automated segmentation of spinal MR images plays a vital role both scientifically and clinically. However, accurately delineating posterior spine structures presents challenges. Methods: This retrospective study, approved by the…

Semantic segmentation is a critical step in automated image interpretation and analysis where pixels are classified into one or more predefined semantically meaningful classes. Deep learning approaches for semantic segmentation rely on…

Computer Vision and Pattern Recognition · Computer Science 2023-07-10 Tushar Kataria , Beatrice Knudsen , Shireen Elhabian

Automatically determining the position of every slice in a CT scan is a basic yet powerful capability allowing fast retrieval of region of interest for visual inspection and automated analysis. Unlike conventional localization approaches…

Image and Video Processing · Electrical Eng. & Systems 2023-12-06 Amit Oved

We propose a new deep learning based approach for camera relocalization. Our approach localizes a given query image by using a convolutional neural network (CNN) for first retrieving similar database images and then predicting the relative…

Computer Vision and Pattern Recognition · Computer Science 2017-08-02 Zakaria Laskar , Iaroslav Melekhov , Surya Kalia , Juho Kannala

Learning-based medical image registration has matched the accuracy of conventional methods while offering superior computational efficiency. However, existing approaches suffer from poor generalization across diverse clinical scenarios,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-25 Zi Li , Jianpeng Zhang , Tai Ma , Tony C. W. Mok , Yan-Jie Zhou , Zeli Chen , Xianghua Ye , Le Lu , Cheng Chen , Dakai Jin

Registration of pre-operative 3-D volumes to intra-operative 2-D X-ray images is important in minimally invasive medical procedures. Rigid registration can be performed by estimating a global rigid motion that optimizes the alignment of…

Computer Vision and Pattern Recognition · Computer Science 2018-10-29 Roman Schaffert , Jian Wang , Peter Fischer , Anja Borsdorf , Andreas Maier

Visual localization is of great importance in robotics and computer vision. Recently, scene coordinate regression based methods have shown good performance in visual localization in small static scenes. However, it still estimates camera…

Computer Vision and Pattern Recognition · Computer Science 2021-05-25 Zhaoyang Huang , Han Zhou , Yijin Li , Bangbang Yang , Yan Xu , Xiaowei Zhou , Hujun Bao , Guofeng Zhang , Hongsheng Li

The aim of this study is to investigate the segmentation accuracies of different segmentation networks trained on 730 manually annotated lateral lumbar spine X-rays. Instance segmentation networks were compared to semantic segmentation…

Image and Video Processing · Electrical Eng. & Systems 2020-04-08 Sandor Konya , Sai Natarajan T R , Hassan Allouch , Kais Abu Nahleh , Omneya Yakout Dogheim , Heinrich Boehm

We tackle the challenging problem of single-source domain generalization (DG) for medical image segmentation, where we train a network on one domain (e.g., CT) and directly apply it to a different domain (e.g., MR) without adapting the…

Computer Vision and Pattern Recognition · Computer Science 2026-04-29 Franz Thaler , Martin Urschler , Mateusz Kozinski , Matthias AF Gsell , Gernot Plank , Darko Stern

Body tissue composition is a long-known biomarker with high diagnostic and prognostic value in cardiovascular, oncological and orthopaedic diseases, but also in rehabilitation medicine or drug dosage. In this study, the aim was to develop a…

Image and Video Processing · Electrical Eng. & Systems 2020-10-22 Sven Koitka , Lennard Kroll , Eugen Malamutmann , Arzu Oezcelik , Felix Nensa

Domain adaptive pose estimation aims to enable deep models trained on source domain (synthesized) datasets produce similar results on the target domain (real-world) datasets. The existing methods have made significant progress by conducting…

Computer Vision and Pattern Recognition · Computer Science 2024-04-26 Yugan Chen , Lin Zhao , Yalong Xu , Honglei Zu , Xiaoqi An , Guangyu Li

Analysis of dental radiographs is an important part of the diagnostic process in daily clinical practice. Interpretation by an expert includes teeth detection and numbering. In this project, a novel solution based on adaptive histogram…

Image and Video Processing · Electrical Eng. & Systems 2020-05-05 Yaqi Wang , Lingling Sun , Yifang Zhang , Dailin Lv , Zhixing Li , Wuteng Qi

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