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Computed tomography (CT) is an effective medical imaging modality, widely used in the field of clinical medicine for the diagnosis of various pathologies. Advances in Multidetector CT imaging technology have enabled additional…

图像与视频处理 · 电气工程与系统科学 2022-04-11 Abril Corona-Figueroa , Jonathan Frawley , Sam Bond-Taylor , Sarath Bethapudi , Hubert P. H. Shum , Chris G. Willcocks

Neural implicit fields have recently emerged as a useful representation for 3D shapes. These fields are commonly represented as neural networks which map latent descriptors and 3D coordinates to implicit function values. The latent…

计算机视觉与模式识别 · 计算机科学 2022-05-11 Hsueh-Ti Derek Liu , Francis Williams , Alec Jacobson , Sanja Fidler , Or Litany

Creating high-fidelity 3D meshes with arbitrary topology, including open surfaces and complex interiors, remains a significant challenge. Existing implicit field methods often require costly and detail-degrading watertight conversion, while…

计算机视觉与模式识别 · 计算机科学 2025-03-28 Xianglong He , Zi-Xin Zou , Chia-Hao Chen , Yuan-Chen Guo , Ding Liang , Chun Yuan , Wanli Ouyang , Yan-Pei Cao , Yangguang Li

3D neural implicit representations play a significant component in many robotic applications. However, reconstructing neural radiance fields (NeRF) from realistic event data remains a challenge due to the sparsities and the lack of…

机器人学 · 计算机科学 2024-01-31 Jiaxu Wang , Junhao He , Ziyi Zhang , Renjing Xu

Recent advances in neural scene representations have led to unprecedented quality in 3D reconstruction and view synthesis. Despite achieving high-quality results for common benchmarks with curated data, outputs often degrade for data that…

Neural Radiance Fields (NeRFs) have demonstrated remarkable effectiveness in novel view synthesis within 3D environments. However, extracting a radiance field of one specific object from multi-view images encounters substantial challenges…

计算机视觉与模式识别 · 计算机科学 2023-11-28 Zhiyi Li , Lihe Ding , Tianfan Xue

This work presents a unified framework for the unsupervised prediction of physically plausible interpolations between two 3D articulated shapes and the automatic estimation of dense correspondence between them. Interpolation is modelled as…

计算机视觉与模式识别 · 计算机科学 2025-04-11 Adam Hartshorne , Allen Paul , Tony Shardlow , Neill D. F. Campbell

3D surface reconstruction from images is essential for numerous applications. Recently, Neural Radiance Fields (NeRFs) have emerged as a promising framework for 3D modeling. However, NeRFs require accurate camera poses as input, and…

计算机视觉与模式识别 · 计算机科学 2024-07-18 Yiyang Chen , Siyan Dong , Xulong Wang , Lulu Cai , Youyi Zheng , Yanchao Yang

Accurate spatiotemporal image reconstruction methods are needed for a wide range of biomedical research areas but face challenges due to data incompleteness and computational burden. Data incompleteness arises from the undersampling often…

图像与视频处理 · 电气工程与系统科学 2024-10-10 Luke Lozenski , Refik Mert Cam , Mark D. Pagel , Mark A. Anastasio , Umberto Villa

We present a new method for estimating the Neural Reflectance Field (NReF) of an object from a set of posed multi-view images under unknown lighting. NReF represents 3D geometry and appearance of objects in a disentangled manner, and are…

计算机视觉与模式识别 · 计算机科学 2022-10-11 Xiu Li , Xiao Li , Yan Lu

X-ray imaging, based on penetration, enables detailed visualization of internal structures. Building on this capability, existing implicit 3D reconstruction methods have adapted the NeRF model and its variants for internal CT…

计算机视觉与模式识别 · 计算机科学 2025-12-18 Qinglei Cao , Ziyao Tang , Xiaoqin Tang

Dynamic imaging is essential for analyzing various biological systems and behaviors but faces two main challenges: data incompleteness and computational burden. For many imaging systems, high frame rates and short acquisition times require…

图像与视频处理 · 电气工程与系统科学 2024-06-12 Luke Lozenski , Mark A. Anastasio , Umberto Villa

We introduce an output layer for neural networks that ensures satisfaction of convex constraints. Our approach, $\Pi$net, leverages operator splitting for rapid and reliable projections in the forward pass, and the implicit function theorem…

机器学习 · 计算机科学 2026-02-19 Panagiotis D. Grontas , Antonio Terpin , Efe C. Balta , Raffaello D'Andrea , John Lygeros

Neural implicit surface reconstruction using volume rendering techniques has recently achieved significant advancements in creating high-fidelity surfaces from multiple 2D images. However, current methods primarily target scenes with…

计算机视觉与模式识别 · 计算机科学 2025-05-13 Lintao Xiang , Hongpei Zheng , Bailin Deng , Hujun Yin

Machine learning approaches for solving partial differential equations require learning mappings between function spaces. While convolutional or graph neural networks are constrained to discretized functions, neural operators present a…

Reconstructing high-quality 3D objects from sparse, partial observations from a single view is of crucial importance for various applications in computer vision, robotics, and graphics. While recent neural implicit modeling methods show…

计算机视觉与模式识别 · 计算机科学 2021-11-29 Shivam Duggal , Zihao Wang , Wei-Chiu Ma , Sivabalan Manivasagam , Justin Liang , Shenlong Wang , Raquel Urtasun

Neural Radiance Fields (NeRF) achieve remarkable performance in dense multi-view scenarios, but their reconstruction quality degrades significantly under sparse inputs due to geometric artifacts. Existing methods utilize global depth…

计算机视觉与模式识别 · 计算机科学 2026-01-06 Weiqi Yu , Yiyang Yao , Lin He , Jianming Lv

Neural implicit functions have emerged as a powerful representation for surfaces in 3D. Such a function can encode a high quality surface with intricate details into the parameters of a deep neural network. However, optimizing for the…

计算机视觉与模式识别 · 计算机科学 2021-04-13 Wang Yifan , Shihao Wu , Cengiz Oztireli , Olga Sorkine-Hornung

We present a novel way of approaching image-based 3D reconstruction based on radiance fields. The problem of volumetric reconstruction is formulated as a non-linear least-squares problem and solved explicitly without the use of neural…

计算机视觉与模式识别 · 计算机科学 2021-12-13 Sverker Rasmuson , Erik Sintorn , Ulf Assarsson

We present a method that accelerates reconstruction of 3D scenes and objects, aiming to enable instant reconstruction on edge devices such as mobile phones and AR/VR headsets. While recent works have accelerated scene reconstruction…

计算机视觉与模式识别 · 计算机科学 2025-03-31 Chaojian Li , Bichen Wu , Albert Pumarola , Peizhao Zhang , Yingyan Celine Lin , Peter Vajda