Results 21 to 30 of about 44,169 (308)

An Active Contour Model without Edges [PDF]

, 1999
In this paper, we propose a new model for active contours to detect objects in a given image, based on techniques of curve evolution, Mumford-Shah functional for segmentation and level sets. Our model can detect objects whose boundaries are not necessarily defined by gradient.
Tony F. Chan, Luminita A. Vese
openaire   +1 more source

Image Segmentation Using an Active Contour Model Based on the Difference Between Local Intensity Averages and Actual Image Intensities

IEEE Access, 2020
The local intensity fitting active contour models can handle inhomogeneous images, but they suffer from the shortcomings of poor performance in segmenting images with severe intensity inhomogeneity and being sensitive to initializations.
Xiaoying Shan, Xiaoliang Gong, Yingchun Ren, Asoke K. Nandi   +3 more
doaj   +1 more source

Ontology-Coupled Active Contours for Dynamic Video Scene Understanding [PDF]

, 2011
In this paper, we present an innovative approach coupling active contours with an ontological representation of knowledge, in order to understand scenes acquired by a moving camera and containing multiple non-rigid objects evolving over space and time ...
McCluskey, Thomas L., Thomas L. McCluskey, Olszewska, Joanna Isabelle, Olszewska, Joanna I., Joanna I. Olszewska   +4 more
core   +1 more source

Performance Evaluation of Contour Based Segmentation Methods for Ultrasound Images

Advances in Multimedia, 2018
Active contour methods are widely used for medical image segmentation. Using level set algorithms the applications of active contour methods have become flexible and convenient. This paper describes the evaluation of the performance of the active contour
R. J. Hemalatha, V. Vijaybaskar, T. R. Thamizhvani   +2 more
doaj   +1 more source

Active Contour Models Based on Block Similarity for Multiple Objects Segmentation

Complexity, 2019
For the model of active contours with group similarity (ACGS), a rank constraint for a group of evolving contours is defined to keep the shape similarity.
Guoqi Liu, Jinjin Wei
doaj   +1 more source

Robust Active Contour Model Using Patch-Based Signed Pressure Force and Optimized Fractional-Order Edge

IEEE Access, 2021
Active contour models (ACMs) are the most widely used method for image segmentation. However, global fitting ACMs cannot effectively segment inhomogeneous images and local fitting ACMs suffer from noise and the initial position of the contour.
Hongli Lv, Fangjian Zhang, Renfang Wang
doaj   +1 more source

Hospitalization Through Families’ Eyes: Comparing Inpatient Care Quality for Children With Sickle Cell Disease and Cystic Fibrosis in Canada

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Sickle cell disease (SCD) is a chronic, inherited hemoglobinopathy that requires frequent hospitalization for disease‐related complications. Canadian data on inpatient care is limited. This study compared caregiver‐reported hospital experiences of children with SCD to those with cystic fibrosis (CF), a chronic, autosomal recessive ...
Hailey M. Zwicker, Kyle Kemp, Perri Tutelman, Sharon H. J. Hou, Paul Fairie, Maria Santana, Gregory M. T. Guilcher, Taryn Fay‐McClymont, Glenda Bendiak, Wendy Pelletier, Nicola Wright, Fiona Schulte   +11 more
wiley   +1 more source

Active Contour Model Coupling with Higher Order Diffusion for Medical Image Segmentation

International Journal of Biomedical Imaging, 2014
Active contour models are very popular in image segmentation. Different features such as mean gray and variance are selected for different purpose. But for image with intensity inhomogeneities, there are no features for segmentation using the active ...
Guodong Wang, Jie Xu, Qian Dong, Zhenkuan Pan   +3 more
doaj   +1 more source

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho, Karim M. Soliman, Wisit Cheungpasitporn, Wannasit Wathanavasin, Ahmed Daoud, Ahmed I. Kamal, Balázs Szamosfalvi, Tibor Fülöp   +7 more
wiley   +1 more source

A Novel Global Energy and Local Energy-Based Legendre Polynomial Approximation for Image Segmentation

Journal of Function Spaces, 2020
Active contour model (ACM) is a powerful segmentation method based on differential equation. This paper proposes a novel adaptive ACM to segment those intensity inhomogeneity images.
Feng Hu, Mengyun Zhang, Bo Chen
doaj   +1 more source