Dr. Koenraad A. Vermeer Profile

Dr. Koenraad A. Vermeer

Head of Ophthalmic Imaging & Data Analysis at Rotterdam Ophthalmic Institute

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Publications (9)

Proceedings Article | 15 March 2019 Paper

Automatic detection of the region of interest in corneal endothelium images using dense convolutional neural networks

Juan P. Vigueras-Guillén, Hans Lemij, Jeroen van Rooij, Koenraad Vermeer, Lucas van Vliet

Proceedings Volume 10949, 1094931 (2019) https://doi.org/10.1117/12.2512641

KEYWORDS: Image segmentation, Biological research, Error analysis, Microscopy, Convolutional neural networks, Cornea

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Proceedings Article | 14 February 2018 Paper

Accurate estimation of the attenuation coefficient from axial point spread function corrected OCT scans of a single layer phantom

Babak Ghafaryasl, Koenraad Vermeer, J. Kalkman, Tom Callewaert, Johannes de Boer, Lucas van Vliet

Proceedings Volume 10483, 104832B (2018) https://doi.org/10.1117/12.2292002

KEYWORDS: Optical coherence tomography, Point spread functions, Signal attenuation, Error analysis, Data modeling, Beam shaping, Statistical analysis, Light scattering, Signal processing, Tissue optics

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Proceedings Article | 3 March 2017 Paper

Detection of retinal changes from illumination normalized fundus images using convolutional neural networks

Kedir Adal, Peter van Etten, Jose Martinez, Kenneth Rouwen, Koenraad Vermeer, Lucas van Vliet

Proceedings Volume 10134, 101341N (2017) https://doi.org/10.1117/12.2254342

KEYWORDS: Convolutional neural networks, Blood vessels, Neural networks, Eye, Eye models, Feature extraction, Retina, Machine learning, Data modeling, Image registration, Image analysis, RGB color model

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Proceedings Article | 24 February 2017 Paper

Automatic estimation of retinal nerve fiber bundle orientation in SD-OCT images using a structure-oriented smoothing filter

Babak Ghafaryasl, Robert Baart, Johannes de Boer, Koenraad Vermeer, Lucas van Vliet

Proceedings Volume 10133, 101330C (2017) https://doi.org/10.1117/12.2254135

KEYWORDS: Nerve, Image filtering, Optical coherence tomography, Structured optical fibers, Optical filters, Visualization, Image processing, Macula, Blood vessels, Gaussian filters

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Proceedings Article | 26 April 2016 Presentation

Parallel scanning light ophthalmoscope for retinal imaging (Conference Presentation)

Kari Vienola, Mathivanan Damodaran, Boy Braaf, Koenraad Vermeer, Johannes de Boer

Proceedings Volume 9693, 96930R (2016) https://doi.org/10.1117/12.2205247

KEYWORDS: Retinal scanning, Confocal microscopy, Retina, Digital micromirror devices, Scanning laser ophthalmoscopy, Eye, Image acquisition, High speed imaging, Micromirrors, Cameras

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Proceedings Article | 21 March 2016 Paper

Loosely coupled level sets for retinal layers and drusen segmentation in subjects with dry age-related macular degeneration

Jelena Novosel, Ziyuan Wang, Henk de Jong, Koenraad Vermeer, Lucas van Vliet

Proceedings Volume 9784, 97842P (2016) https://doi.org/10.1117/12.2214698

KEYWORDS: 3D image processing, Interfaces, Image segmentation, Signal attenuation, Optical coherence tomography, Retina, Eye, Vitreous, Liquid crystal lasers, Gaussian filters

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Proceedings Article | 26 March 2013 Paper

Comparison of RNFL thickness and RPE-normalized RNFL attenuation coefficient for glaucoma diagnosis

K. Vermeer, J. van der Schoot, H. Lemij, J. de Boer

Proceedings Volume 8567, 85671D (2013) https://doi.org/10.1117/12.2000664

KEYWORDS: Signal attenuation, Optical coherence tomography, Interfaces, Tissues, Tissue optics, Nerve, Scatter measurement, Scattering, Eye, Receivers

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Proceedings Article | 9 March 2012 Paper

Quantitative RNFL attenuation coefficient measurements by RPE-normalized OCT data

K. Vermeer, J. van der Schoot, H. Lemij, J. de Boer

Proceedings Volume 8209, 82090U (2012) https://doi.org/10.1117/12.907764

KEYWORDS: Signal attenuation, Optical coherence tomography, Signal detection, Scattering, Eye models, Retina, Eye, Backscatter, Tissues, Laser scattering

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Proceedings Article | 12 February 2011 Paper

Segmentation of retinal layers in volumetric OCT scans of normal and glaucomatous subjects

K. Vermeer, J. van der Schoot, H. Lemij, J. de Boer

Proceedings Volume 7885, 78851B (2011) https://doi.org/10.1117/12.873698

KEYWORDS: Interfaces, Optical coherence tomography, Image segmentation, Retina, Eye, Human-machine interfaces, Nerve, Data acquisition, Blood vessels, Optic nerve

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Showing 5 of 9 publications

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