Results 41 to 50 of about 7,242 (173)

Iris segmentation using a non-decimated wavelet transform [PDF]

, 2015
This paper presents an iris segmentation algorithm. The proposed technique applies a histogram based method on the input eye image extracting a point within the pupil.
Bagheri Zadeh, P, Behringer, R, Sheikh Akbari, A   +2 more
core   +1 more source

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

Advanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal, Jan Kubíček, Jana Bahrová, Alice Varyšová, Martin Augustýnek, Marek Penhaker, Juraj Timkovič   +6 more
wiley   +1 more source

Optic nerve head segmentation [PDF]

, 2004
Reliable and efficient optic disk localization and segmentation are important tasks in automated retinal screening. General-purpose edge detection algorithms often fail to segment the optic disk due to fuzzy boundaries, inconsistent image contrast or ...
Basu, A., Fletcher, E., Hunter, Andrew, Kennedy, L., Lowell, J., Ryder, R., Steel, D.   +6 more
core   +1 more source

‘Mere Amateurs’? Elementary Teachers and the Making of Scientific Authority in the British Child Study Movement

History, EarlyView.
Abstract This article offers new perspectives on the relationship between elementary teaching, scientific expertise and the professionalization of the human sciences. Previous scholarship has demonstrated the ready existence of ‘amateur’ science societies in the nineteenth century where cross‐class exchanges were common.
Julia Gustavsson
wiley   +1 more source

Track initialisation for multiple formations based on neutrosophic Hough transform

IET Radar, Sonar & Navigation
Track crossing is a major issue in the initialisation of multiple‐flight trajectories. To solve this problem, the authors propose a track initialisation algorithm.
Yang Penggang, Wang Kun, Feng Guangdong
doaj   +1 more source

Automated Quantitative Description of Spiral Galaxy Arm-Segment Structure [PDF]

, 2013
We describe a system for the automatic quantification of structure in spiral galaxies. This enables translation of sky survey images into data needed to help address fundamental astrophysical questions such as the origin of spiral structure---a ...
Davis, Darren, Hayes, Wayne
core  

Affordable interactive virtual reality system for the Dynamic Hip Screw surgery training in vitro [PDF]

, 2012
Interactive virtual reality systems provide safe and cost-effective training environment to improve the technical skills and competence of surgeons. The trainees can have as many practice sessions, without need to the trainer all the time, before even ...
Ahmed, Amr, Maqsood, Mohammed, Saif, Hassan, Salman, Anas   +3 more
core   +1 more source

Spatial Image Gradient Estimation From the Diffusion MRI Profile

Magnetic Resonance in Medicine, Volume 95, Issue 5, Page 2980-2991, May 2026.
ABSTRACT Purpose In the course of diffusion, water molecules encounter varying values for the relaxation‐time properties of the underlying tissue. This factor, which has rarely been accounted for in diffusion MRI (dMRI), is modeled in this work, allowing for the estimation of the gradient of relaxation‐time properties from the dMRI signal. Methods With
Iman Aganj, Thorsten Feiweier, John E. Kirsch, Bruce R. Fischl, Andre J. van der Kouwe   +4 more
wiley   +1 more source

Evolution of Patient and Public Involvement and Engagement in Health‐Related Research: A Concept Analysis

Journal of Advanced Nursing, Volume 82, Issue 5, Page 4827-4839, May 2026.
ABSTRACT Aims To clarify the definition and evolution of Patient and Public Involvement and Engagement (PPIE) and identify its attributes, antecedents, and consequences in health‐related research. Design This study follows Rodgers' evolutionary concept analysis with a seven‐step framework.
Wenze Lu, Yan Li, Catherine Evans, David Currow, Jonathan Bayuo, Tingyu Zheng, Zhihui Lu, Mengqi Li, Julie Wray, Janelle Yorke   +9 more
wiley   +1 more source

Automatic Structural Scene Digitalization [PDF]

, 2017
In this paper, we present an automatic system for the analysis and labeling of structural scenes, floor plan drawings in Computer-aided Design (CAD) format.
Cosker, Darren, Li, Wenbin, Tang, Rui, Wang, Yuhan   +3 more
core   +3 more sources