Results 51 to 60 of about 3,994 (183)

Survey on differential estimators for 3d point clouds

Computer Graphics Forum, EarlyView.
Abstract Recent advancements in 3D scanning technologies, including LiDAR and photogrammetry, have enabled the precise digital replication of real‐world objects. These methods are widely used in fields such as GIS, robotics, and cultural heritage. However, the point clouds generated by such scans are often noisy and unstructured, posing challenges for ...
Léo Arnal–Anger, Thibault Lejemble, David Coeurjolly, Loïc Barthe, Nicolas Mellado   +4 more
wiley   +1 more source

Fixing the RANSAC Stopping Criterion

CoRR
For several decades, RANSAC has been one of the most commonly used robust estimation algorithms for many problems in computer vision and related fields. The main contribution of this paper lies in addressing a long-standing error baked into virtually any system building upon the RANSAC algorithm. Since its inception in 1981 by Fischler and Bolles, many
Johannes L. Schönberger, Viktor Larsson, Marc Pollefeys   +2 more
openaire   +2 more sources

Research on unwrapping and stitching methods for borehole images

Gong-kuang zidonghua
Generating panoramic borehole wall images and "virtual cores" through image unwrapping and stitching is the basis for quantitative analysis of geological structures and is also an urgent need in borehole investigation.
DENG Libo, WANG Xiaolong
doaj   +1 more source

Geometry‐Aware Alignment and Comparison of Hierarchical Morse Complexes with Applications

Computer Graphics Forum, EarlyView.
Abstract Scalar fields derived from 3D X‐ray CT scans of samples undergoing ex situ processes, such as thermal aging, chemical etching, or mechanical stress, pose unique challenges for characterizing similarities and differences across acquisitions. Typically, a sample A (source) is imaged, removed, and subjected to experimental conditions that alter ...
Aniketh Venkat, Attila Gyulassy, Peer‐Timo Bremer, Valerio Pascucci   +3 more
wiley   +1 more source

Cardiovascular Responses to Natural and Auditory Evoked Slow Waves Predict Post‐Sleep Cardiac Function

Journal of Sleep Research, EarlyView.
ABSTRACT The importance of sleep as a key component of cardiovascular health has been increasingly recognized. Our previous research demonstrated that auditory‐enhanced slow waves increase cardiac function, but the underlying mechanisms behind these beneficial effects remain uncertain. In this study, we examined the influence of two types of slow waves
Giulia Alessandrelli, Stephanie Huwiler, Giulio Bernardi, Manuel Carro‐Domínguez, Fabia Stich, Rossella Sala, Florent Aziri, Anna Trippel, Susanne Markendorf, David Niederseer, Philipp Bohm, Pietro Cerveri, Francesca Siclari, Reto Huber, Nicole Wenderoth, Christian Schmied, Caroline Lustenberger   +16 more
wiley   +1 more source

Centralized RANSAC-Based Point Cloud Registration With Fast Convergence and High Accuracy

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
For point cloud registration, the purpose of this article is to propose a novel centralized random sample consensus (RANSAC) (C-RANSAC) registration with fast convergence and high accuracy.
Kuo-Liang Chung, Wei-Tai Chang
doaj   +1 more source

Three‐dimensional digital quantitative analysis of periodontal and peri‐implant phenotype—A narrative review

Periodontology 2000, EarlyView.
Abstract 3D digital evaluation of the periodontal and peri‐implant tissue, including CBCT, intraoral scanning, optical surface scanning, and ultrasonography, is being used in the clinical arena with increasing frequency. Thus, to validate the utilization of 3D digital analysis for this purpose, a critical evaluation of the reliability of digital ...
Yi Te Lin, Chenshuang Li, Jonathan Korostoff, Joseph P. Fiorellini, Jie Yang, Yu‐Cheng Chang   +5 more
wiley   +1 more source

Sound‐offset encoding is related to speech‐in‐noise perception at sentence level in older adults

The Journal of Physiology, EarlyView.
Abstract figure legend Schematic summary of the study investigating sound‐onset and offset sensitivity in the brain of older adults. EEG responses to white‐noise bursts were recorded to examine neural encoding of sound onset and offset during passive listening and active task conditions.
Hasan Colak, Xiaoxuan Guo, Adèle Simon, Ester Benzaquén, William Sedley, Jennifer F. Linden, Timothy D. Griffiths   +6 more
wiley   +1 more source

Improved RANSAC features image-matching method based on SURF

The Journal of Engineering, 2019
For the speed of traditional SIFT algorithm in the feature extraction and matching is slow, the article proposes an improved RANSAC features image matching method based on speeded up robust features (SURF).
Jinliang Liu, FanLiang Bu, FanLiang Bu
doaj   +1 more source

H-RANSAC: A HYBRID POINT CLOUD SEGMENTATION COMBINING 2D AND 3D DATA [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
In this paper, we present a novel 3D segmentation approach operating on point clouds generated from overlapping images. The aim of the proposed hybrid approach is to effectively segment co-planar objects, by leveraging the structural information ...
A. Adam, E. Chatzilari, S. Nikolopoulos, I. Kompatsiaris   +3 more
doaj   +1 more source