Results 31 to 40 of about 20,764 (282)

Geodesic Length Measurement in Medical Images: Effect of the Discretization by the Camera Chip and Quantitative Assessment of Error Reduction Methods

open access: yesPhotonics, 2020
After interventions such as bypass surgeries the vascular function is checked qualitatively and remotely by observing the blood dynamics inside the vessel via Fluorescence Angiography.
Ady Naber, Daniel Berwanger, Werner Nahm
doaj   +1 more source

Automated vessel centerline extraction and diameter measurement in OCT Angiography

open access: yesCurrent Directions in Biomedical Engineering, 2021
Optical Coherence Tomography Angiography (OCTA) is a non-invasive imaging technique that enables the visualization of perfused vasculature in vivo. In ophthalmology, it allows the physician to monitor diseases affecting the vascular networks of the ...
Viertel Bernhard K. J.   +6 more
doaj   +1 more source

Robust Analysis and Laser Stripe Center Extraction for Rail Images

open access: yesApplied Sciences, 2021
In this paper, a novel method for the effective extraction of the light stripes in rail images is proposed. First, a preprocessing procedure that includes self-adaptive threshold segmentation and brightness enhancement is adopted to improve the quality ...
Huiping Gao, Guili Xu
doaj   +1 more source

Simultaneous Extraction of Road and Centerline from Aerial Images Using a Deep Convolutional Neural Network

open access: yesISPRS International Journal of Geo-Information, 2021
The extraction of roads and centerlines from aerial imagery is considered an important topic because it contributes to different fields, such as urban planning, transportation engineering, and disaster mitigation. Many researchers have studied this topic
Tamara Alshaikhli   +2 more
doaj   +1 more source

Graph Refinement based Airway Extraction using Mean-Field Networks and Graph Neural Networks

open access: yes, 2020
Graph refinement, or the task of obtaining subgraphs of interest from over-complete graphs, can have many varied applications. In this work, we extract trees or collection of sub-trees from image data by, first deriving a graph-based representation of ...
de Bruijne, Marleen   +6 more
core   +1 more source

Narrow River Extraction From SAR Images Using Exogenous Information

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Monitoring of rivers is of major scientific and societal importance due to the crucial resource they provide to human activities and the threats caused by flood events. Rapid revisit synthetic aperture radar (SAR) sensors such as Sentinel-1 or the future
Nicolas Gasnier   +4 more
doaj   +1 more source

An automatic method for road centerline extraction from post-earthquake aerial images

open access: yesGeodesy and Geodynamics, 2019
Road vector database plays an important role in post-earthquake relief, rescue and reconstruction. However, due to data privacy policy, it is difficult for general users to obtain high-precision and complete vector data of road network. The OpenStreetMap
Zhumei Liu, Jingfa Zhang, Xue Li
doaj   +1 more source

Optimal Time Selection for ISAR Imaging of Ship Target via Novel Approach of Centerline Extraction With RANSAC Algorithm

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Optimal time selection for inverse synthetic aperture radar imaging of ship target is significant for the determination of image project plane, and the performance of it is dependent on the accuracy of ship centerline extraction. In this article, a novel
Rui Cao, Yong Wang, Yun Zhang, Mao Jian
doaj   +1 more source

Automatic Centerline Extraction for 3D Virtual Bronchoscopy [PDF]

open access: yes, 2000
Centerline extraction is the basis to understand three dimensional structure of the lung. In this paper, an automatic centerline determination algorithm for three dimensional virtual bronchoscopy CT image is presented. This algorithm has two main components. They are end points retrieval algorithm and graph based centerline algorithm.
Tsui Ying Law, Pheng Ann Heng
openaire   +1 more source

Landslide Trail Extraction Using Fire Extinguishing Model

open access: yesRemote Sensing, 2022
Landslide trails are important elements of landslide inventory maps, providing valuable information for landslide risk and hazard assessment. Compared with traditional manual mapping, skeletonization methods offer a more cost-efficient way to map ...
Zhao Zhan   +6 more
doaj   +1 more source

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