Prof. Boštjan Likar Profile

Prof. Boštjan Likar

Professor at Univ of Ljubljana

SPIE Involvement:

Author

Publications (92)

Proceedings Article | 20 May 2022 Poster + Paper

Autofocus algorithms for lensless on-chip microscopy validated on synthetic targets for microfluidic applications and particle tracking

Zan Cimperman, Peter Naglic, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 12136, 1213617 (2022) https://doi.org/10.1117/12.2621693

KEYWORDS: 3D image reconstruction, Particles, Mie scattering, Microfluidics, Reconstruction algorithms, Microscopy, Optical simulations, Holograms

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Proceedings Article | 9 December 2021 Paper

Efficient Monte Carlo simulations of subdiffusive reflectance for spatial frequency domain imaging systems with a low NA

Yevhen Zelinskyi, Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 11920, 119201U (2021) https://doi.org/10.1117/12.2615422

KEYWORDS: Monte Carlo methods, Data modeling, Reflectivity, Optical properties, Computer simulations, Spatial frequencies, Signal to noise ratio, Sensors, Scattering, Imaging systems

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Proceedings Article | 9 December 2021 Paper

pyxopto: an open-source Python library with utilities for fast light propagation modeling in turbid media

Peter Naglič, Yevhen Zelinskyi, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 11920, 1192012 (2021) https://doi.org/10.1117/12.2615340

KEYWORDS: Scattering, Light scattering, Optical fibers, Tissue optics, Biomedical optics, Radiative transfer, Optical properties, Reflectivity, Monte Carlo methods, Mie scattering

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Proceedings Article | 15 February 2021 Presentation + Paper

Modality agnostic intracranial aneurysm detection through supervised vascular surface classification

Žiga Bizjak, Boštjan Likar, Franjo Pernuš, Žiga Špiclin

Proceedings Volume 11597, 115970O (2021) https://doi.org/10.1117/12.2580868

KEYWORDS: Aneurysms, Angiography, 3D modeling, Visualization, Performance modeling, Neural networks

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Proceedings Article | 9 March 2020 Presentation

Simple approach to refractive index measurements of polystyrene microspheres (Conference Presentation)

Peter Naglič, Yevhen Zelinskyi, Boštjan Likar, Miran Bürmen

Proceedings Volume 11231, 112310J (2020) https://doi.org/10.1117/12.2546756

KEYWORDS: Refractive index, Optical properties, Scattering, Calibration, Light scattering, Integrating spheres, Time resolved spectroscopy, Mie scattering, Optics manufacturing, Transmittance

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Proceedings Article | 20 February 2020 Presentation + Paper

Phase functions with large domain size for improved estimation of optical properties from subdiffusive reflectance

Yevhen Zelinskyi, Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 11238, 112380T (2020) https://doi.org/10.1117/12.2546530

KEYWORDS: Reflectivity, Scattering, Optical properties, Optical fibers, Calibration, Data modeling, Light scattering, Statistical modeling, Artificial neural networks

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Proceedings Article | 11 July 2019 Paper

Efficient Monte Carlo simulations of spatially resolved reflectance for detection schemes with low numerical apertures

Yevhen Zelinskyi, Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 11074, 110741Y (2019) https://doi.org/10.1117/12.2527044

KEYWORDS: Monte Carlo methods, Reflectivity, Computer simulations, Optical properties, Scattering, Signal to noise ratio, Photon transport, Error analysis, Optical fibers, Data modeling

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Proceedings Article | 11 July 2019 Paper

Robust calibration of reflectance acquired with optical fiber probes

Peter Naglic, Boštjan Likar, Franjo Pernuš, Miran Bürmen

Proceedings Volume 11074, 1107429 (2019) https://doi.org/10.1117/12.2527134

KEYWORDS: Calibration, Mirrors, Reflectivity, Optical fibers, Optical properties, Silver, Scattering, Aluminum, Light, Monte Carlo methods

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Proceedings Article | 13 March 2019 Presentation + Paper

Registration based detection and quantification of intracranial aneurysm growth

Žiga Bizjak, Tim Jerman, Boštjan Likar, Franjo Pernuš, Aichi Chien, Žiga Špiclin

Proceedings Volume 10950, 1095007 (2019) https://doi.org/10.1117/12.2512781

KEYWORDS: Aneurysms, Shape analysis, Statistical analysis, Feature extraction, Image registration, Angiography, Rigid registration, Neck, Image visualization, Receivers

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Proceedings Article | 7 March 2019 Presentation + Paper

From Monte Carlo simulations to efficient estimation of optical properties for spatial frequency domain imaging

Peter Naglič, Yevhen Zelinskyi, Boštjan Likar, Franjo Pernuš, Miran Bürmen

Proceedings Volume 10862, 1086209 (2019) https://doi.org/10.1117/12.2510195

KEYWORDS: Reflectivity, Optical properties, Scattering, Mie scattering, Spatial frequencies, Monte Carlo methods, Computer simulations, Performance modeling, Calibration, Data modeling

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Proceedings Article | 4 March 2019 Paper

OpenCL framework for fast estimation of optical properties from spatial frequency domain images

Peter Naglič, Yevhen Zelinskyi, Boštjan Likar, Franjo Pernuš, Miran Bürmen

Proceedings Volume 10889, 1088919 (2019) https://doi.org/10.1117/12.2509986

KEYWORDS: Optical properties, Reflectivity, Scattering, Spatial frequencies, Mie scattering, Data modeling, Artificial neural networks, Graphics processing units, Absorption, Imaging spectroscopy

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Proceedings Article | 27 February 2019 Presentation + Paper

Fast and accurate Monte Carlo simulations of subdiffusive spatially resolved reflectance for a complex probe-sample interface

Yevhen Zelinskyi, Peter Naglic, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 10872, 108720R (2019) https://doi.org/10.1117/12.2510046

KEYWORDS: Artificial neural networks, Optical fibers, Monte Carlo methods, Computer simulations, Data modeling, Optical properties, Reflectivity, Interfaces, Scattering, Stochastic processes, Refractive index

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Proceedings Article | 27 February 2019 Paper

Poor optical stability of molecular dyes when used as absorbers in water-based tissue-simulating phantoms

Blaž Cugmas, Peter Naglič, Sunil Paul Matthew Menachery, Franjo Pernuš, Boštjan Likar

Proceedings Volume 10870, 108700N (2019) https://doi.org/10.1117/12.2506977

KEYWORDS: Optical phantoms, Scattering media, Absorption, Ultraviolet radiation, Tissue optics, Visible radiation, Transmittance, Optical properties, Molecules, Water, Biomedical optics, Scattering

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Proceedings Article | 2 March 2018 Presentation + Paper

Dataset variability leverages white-matter lesion segmentation performance with convolutional neural network

Domen Ravnik, Tim Jerman, Franjo Pernuš, Boštjan Likar, Žiga Špiclin

Proceedings Volume 10574, 105741J (2018) https://doi.org/10.1117/12.2293702

KEYWORDS: Image segmentation, Scanners, Brain, Neuroimaging, Magnetic resonance imaging, Convolutional neural networks, Image processing, 3D image processing, Performance modeling, Magnetism

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Proceedings Article | 19 February 2018 Paper

Portable measurement system for real-time acquisition and analysis of in-vivo spatially resolved reflectance in the subdiffusive regime

Peter Naglič, Matic Ivančič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 10486, 1048618 (2018) https://doi.org/10.1117/12.2290460

KEYWORDS: Reflectivity, Scattering, Optical fibers, Optical properties, Absorption, Tissues, Biological research, In vivo imaging, Skin, Spectrographs

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Proceedings Article | 13 February 2018 Presentation + Paper

Regression models for real-time estimation of optical and structural sample properties from subdiffusive spatially resolved reflectance

Peter Naglič, Matic Ivančič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 10492, 104920Q (2018) https://doi.org/10.1117/12.2291509

KEYWORDS: Optical properties, Data modeling, Reflectivity, Scattering, Absorption, Optical fibers, 3D modeling, Statistical analysis, Skin, Tissue optics

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Proceedings Article | 7 December 2017 Paper

Color constancy in dermatoscopy with smartphone

Blaž Cugmas, Franjo Pernuš, Boštjan Likar

Proceedings Volume 10592, 105920G (2017) https://doi.org/10.1117/12.2297252

KEYWORDS: RGB color model, Skin, Cameras, Calibration, Color and brightness control algorithms, Color difference, Color management, Color reproduction, Colorimetry

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SPIE Journal Paper | 1 November 2017

Locally adaptive magnetic resonance intensity models for unsupervised segmentation of multiple sclerosis lesions

Alfiia Galimzianova, Ziga Lesjak, Daniel Rubin, Boštjan Likar, Franjo Pernuš, Žiga Špiclin

JMI, Vol. 5, Issue 01, 011007, (November 2017) https://doi.org/10.1117/12.10.1117/1.JMI.5.1.011007

KEYWORDS: Image segmentation, Magnetic resonance imaging, Brain, Neuroimaging, Magnetism, Data modeling, Databases, Performance modeling, 3D modeling, Statistical analysis

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Proceedings Article | 28 July 2017 Paper

Estimation of optical properties from subdiffusive reflectance beyond the second similarity parameter γ

Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 10412, 1041205 (2017) https://doi.org/10.1117/12.2286344

KEYWORDS: Optical properties, Reflectivity, Monte Carlo methods, Light scattering, Scattering

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Proceedings Article | 10 March 2017 Paper

Regression without truth with Markov chain Monte-Carlo

Hennadii Madan, Franjo Pernuš, Boštjan Likar, Žiga Špiclin

Proceedings Volume 10136, 101360K (2017) https://doi.org/10.1117/12.2255880

KEYWORDS: Error analysis, Statistical analysis, Statistical modeling, Medical imaging, Probability theory, Blood, Optimization (mathematics), Heart, Image segmentation, Computed tomography

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Proceedings Article | 24 February 2017 Presentation + Paper

Intervertebral disc segmentation in MR images with 3D convolutional networks

Robert Korez, Bulat Ibragimov, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 10133, 1013306 (2017) https://doi.org/10.1117/12.2254069

KEYWORDS: Target detection, Image segmentation, 3D modeling, 3D image processing, Magnetic resonance imaging, Spine, Computer aided diagnosis and therapy, 3D acquisition, Databases

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Proceedings Article | 15 February 2017 Paper

The role of numerical aperture in efficient estimation of spatially resolved reflectance by a Monte Carlo light propagation model

Matic Ivančič, Peter Naglič, Boštjan Likar, Franjo Pernuš, Miran Bürmen

Proceedings Volume 10062, 100621B (2017) https://doi.org/10.1117/12.2252541

KEYWORDS: Monte Carlo methods, Computer simulations, Tissue optics, Optical properties, Diffuse reflectance spectroscopy, Tissues, Hyperspectral simulation, Optical fibers, Cameras, Absorption, Reflectivity, Imaging systems, Scattering, Calibration

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SPIE Journal Paper | 19 September 2016 Open Access

Estimation of optical properties by spatially resolved reflectance spectroscopy in the subdiffusive regime

Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

JBO, Vol. 21, Issue 09, 095003, (September 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.9.095003

KEYWORDS: Optical fibers, Reflectivity, Optical properties, Scattering, Data modeling, Monte Carlo methods, Reflectance spectroscopy, Absorption, Performance modeling, Tissues

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Proceedings Article | 10 May 2016 Paper

Along-track calibration of SWIR push-broom hyperspectral imaging system

Jurij Jemec, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9860, 98600H (2016) https://doi.org/10.1117/12.2223800

KEYWORDS: Hyperspectral imaging, Calibration, Short wave infrared radiation, Imaging systems, RGB color model, Infrared imaging, Infrared radiation, Systems modeling, Resolution enhancement technologies, Deconvolution, Image resolution, Image segmentation, 3D modeling

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Proceedings Article | 21 March 2016 Paper

Quantitative comparison between the straight-forward and anatomical insertion technique for pedicle screw placement

Dejan Knez, Janez Mohar, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 9784, 978439 (2016) https://doi.org/10.1117/12.2216028

KEYWORDS: Computed tomography, Image analysis, Rods, Surgery, Biological research, Model-based design, 3D modeling, 3D image processing, Spine, Optimization (mathematics), Bone, Fourier transforms, Roentgenium, Visualization

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Proceedings Article | 21 March 2016 Paper

Joint detection and segmentation of vertebral bodies in CT images by sparse representation error minimization

Robert Korez, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 9784, 97842Y (2016) https://doi.org/10.1117/12.2217087

KEYWORDS: Image segmentation, Computed tomography, Spine, Field effect transistors, Feature extraction, Medical imaging, Associative arrays

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Proceedings Article | 7 March 2016 Paper

Extraction of optical properties in the sub-diffuse regime by spatially resolved reflectance spectroscopy

Peter Naglič, Blaž Cugmas, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9706, 97061C (2016) https://doi.org/10.1117/12.2212947

KEYWORDS: Monte Carlo methods, Tissues, Reflectivity, Optical properties, Reflectance spectroscopy, Scattering, Optical fibers, Absorption, Biomedical optics, Photon transport, Data modeling, Performance modeling, Error analysis

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Proceedings Article | 7 March 2016 Presentation + Paper

Extraction of optical properties from hyperspectral images by Monte Carlo light propagation model

Matic Ivančič, Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9706, 97061A (2016) https://doi.org/10.1117/12.2212807

KEYWORDS: Hyperspectral imaging, Monte Carlo methods, Optical properties, Scattering, Calibration, Tissues, Absorption, Light scattering, Imaging systems, Tissue optics

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SPIE Journal Paper | 18 December 2015 Open Access

Properties of contact pressure induced by manually operated fiber-optic probes

Maksimilijan Bregar, Blaž Cugmas, Peter Naglic, Daniela Hartmann, Franjo Pernuš, Boštjan Likar, Miran Bürmen

JBO, Vol. 20, Issue 12, 127002, (December 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.12.127002

KEYWORDS: Skin, Silicon, Tissues, Diffuse reflectance spectroscopy, Fiber optics, In vivo imaging, Tissue optics, Bone, Statistical analysis, Biomedical optics

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Proceedings Article | 15 July 2015 Paper

Comparison of the simplified laterally uniform and geometrically realistic optical fiber probe-tissue interface in terms of Monte Carlo simulated diffuse reflectance

Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9537, 95370R (2015) https://doi.org/10.1117/12.2183867

KEYWORDS: Optical fibers, Monte Carlo methods, Interfaces, Diffuse reflectance spectroscopy, Scattering, Absorption, Tissue optics, Geometrical optics, Optical properties, Tissues

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Proceedings Article | 21 May 2015 Paper

On the response function separability of hyperspectral imaging systems

Jurij Jemec, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9472, 94721N (2015) https://doi.org/10.1117/12.2176981

KEYWORDS: Deconvolution, Imaging systems, Image enhancement, Hyperspectral imaging, Calibration, Mirrors, Image resolution, Collimation, Virtual point source, Spherical lenses

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Proceedings Article | 20 March 2015 Paper

Optimal reinforcement of training datasets in semi-supervised landmark-based segmentation

Bulat Ibragimov, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 9413, 94132K (2015) https://doi.org/10.1117/12.2082321

KEYWORDS: Image segmentation, Image analysis, Lung, Data modeling, Medical imaging, Chest imaging, Target detection, Image processing algorithms and systems, Electrical engineering, Computing systems

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Proceedings Article | 20 March 2015 Paper

Locally adaptive MR intensity models and MRF-based segmentation of multiple sclerosis lesions

Alfiia Galimzianova, Žiga Lesjak, Boštjan Likar, Franjo Pernuš, Žiga Špiclin

Proceedings Volume 9413, 94133G (2015) https://doi.org/10.1117/12.2081642

KEYWORDS: Image segmentation, Magnetic resonance imaging, Brain, Neuroimaging, Tissues, Pathology, Statistical modeling, Fuzzy logic, Data modeling, Statistical analysis

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Proceedings Article | 20 March 2015 Paper

Beyond Frangi: an improved multiscale vesselness filter

Tim Jerman, Franjo Pernuš, Boštjan Likar, Žiga Špiclin

Proceedings Volume 9413, 94132A (2015) https://doi.org/10.1117/12.2081147

KEYWORDS: Image segmentation, Image enhancement, Angiography, Visualization, Signal to noise ratio, 3D image processing, 3D image enhancement, Pathology, Spherical lenses, Lithium

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Proceedings Article | 18 March 2015 Paper

Device and methods for "gold standard" registration of clinical 3D and 2D cerebral angiograms

Hennadii Madan, Boštjan Likar, Franjo Pernuš, Žiga Špiclin

Proceedings Volume 9415, 94151G (2015) https://doi.org/10.1117/12.2081908

KEYWORDS: Gold, Image registration, 3D imaging standards, 3D image processing, Calibration, Standards development, X-rays, Image processing, Angiography, 3D acquisition

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Proceedings Article | 12 March 2015 Paper

A study on the properties of contact pressure induced by manually operated diffuse reflectance fiber optic probes

Maksimilijan Bregar, Blaž Cugmas, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9327, 932717 (2015) https://doi.org/10.1117/12.2077190

KEYWORDS: Tissue optics, Tissues, Skin, Silicon, Diffuse reflectance spectroscopy, Fiber optics, Neodymium, Biomedical optics, Soft tissue optics, Error analysis

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Proceedings Article | 10 March 2015 Paper

Accuracy of experimental data and Monte Carlo simulation lookup table-based inverse models for assessment of turbid media optical properties with diffuse reflectance spectroscopy

Peter Naglič, Maksimilijan Bregar, Franjo Pernuš, Boštjan Likar, Miran Bürmen

Proceedings Volume 9333, 933310 (2015) https://doi.org/10.1117/12.2078257

KEYWORDS: Monte Carlo methods, Diffuse reflectance spectroscopy, Scattering, Optical properties, Data modeling, Absorption, Fiber optics, Performance modeling, Error analysis, Calibration

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SPIE Journal Paper | 9 March 2015 Open Access

Detection of canine skin and subcutaneous tumors by visible and near-infrared diffuse reflectance spectroscopy

Blaž Cugmas, Tanja Plavec, Maksimilijan Bregar, Peter Naglič, Franjo Pernuš, Boštjan Likar, Miran Bürmen

JBO, Vol. 20, Issue 03, 037003, (March 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.3.037003

KEYWORDS: Tumors, Skin, Near infrared, Scattering, In vivo imaging, Diffuse reflectance spectroscopy, Tissues, Visible radiation, Absorption, Optical properties

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Proceedings Article | 21 March 2014 Paper

Determination of the intervertebral disc space from CT images of the lumbar spine

Robert Korez, Darko Štern, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 9034, 90342Q (2014) https://doi.org/10.1117/12.2043734

KEYWORDS: 3D modeling, 3D image processing, Spine, Computed tomography, Surgery, Bone, 3D metrology, Shape analysis, Image analysis, Affine motion model

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Proceedings Article | 11 March 2014 Paper

Validation and comparison of intensity based methods for change detection in serial brain images

Žiga Lesjak, Žiga Špiclin, Boštjan Likar, Franjo Pernuš

Proceedings Volume 9037, 90371C (2014) https://doi.org/10.1117/12.2043102

KEYWORDS: Magnetic resonance imaging, Databases, Brain, Neuroimaging, Data modeling, Binary data, Image registration, Principal component analysis, Statistical modeling, Magnetism

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SPIE Journal Paper | 6 March 2014 Open Access

Impact of contact pressure–induced spectral changes on soft-tissue classification in diffuse reflectance spectroscopy: problems and solutions

Blaž Cugmas, Maksimilijan Bregar, Miran Bürmen, Franjo Pernuš, Boštjan Likar

JBO, Vol. 19, Issue 03, 037002, (March 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.3.037002

KEYWORDS: Skin, Tissues, Veins, Scattering, Diffuse reflectance spectroscopy, Reflectivity, Absorption, Bone, Optical properties, Calibration

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Proceedings Article | 4 March 2014 Paper

Characterization and modeling of point spread function in push-broom hyperspectral imaging systems for spectral and spatial resolution enhancement

Jurij Jemec, Miran Bürmen, Matjaž Kosec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8936, 893616 (2014) https://doi.org/10.1117/12.2040134

KEYWORDS: Deconvolution, Imaging systems, Hyperspectral imaging, Resolution enhancement technologies, Spatial resolution, Image enhancement, Lamps, Image resolution, Image processing, Systems modeling

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SPIE Journal Paper | 21 February 2014 Open Access

Contact pressure–aided spectroscopy

Maksimilijan Bregar, Miran Bürmen, Uros Aljancic, Blaž Cugmas, Franjo Pernuš, Boštjan Likar

JBO, Vol. 19, Issue 02, 020501, (February 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.2.020501

KEYWORDS: In vivo imaging, Diffuse reflectance spectroscopy, Skin, Spectroscopy, Tissue optics, Tissues, Control systems, Near infrared, Optical properties, Calibration

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SPIE Journal Paper | 3 April 2013 Open Access

Pressure-induced near infrared spectra response as a valuable source of information for soft tissue classification

Blaž Cugmas, Miran Bürmen, Maksimilijan Bregar, Franjo Pernuš, Boštjan Likar

JBO, Vol. 18, Issue 04, 047002, (April 2013) https://doi.org/10.1117/12.10.1117/1.JBO.18.4.047002

KEYWORDS: Tissues, Skin, Absorption, Scattering, Reflectivity, Near infrared spectroscopy, Principal component analysis, Tissue optics, Diffuse reflectance spectroscopy, Veins

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Proceedings Article | 13 March 2013 Paper

Evaluation of 3D-2D registration methods for registration of 3D-DSA and 2D-DSA cerebral images

Uroš Mitrović, Žiga Špiclin, Boštjan Likar, Franjo Pernuš

Proceedings Volume 8669, 866931 (2013) https://doi.org/10.1117/12.2007009

KEYWORDS: Image registration, 3D image processing, Gold, Imaging systems, Calibration, 3D imaging standards, 3D acquisition, Angiography, Pathology, Sensors

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Proceedings Article | 13 March 2013 Paper

Quantitative vertebral morphometry in 3D

Darko Štern, Vesna Njagulj, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 8669, 86690F (2013) https://doi.org/10.1117/12.2003646

KEYWORDS: 3D modeling, 3D image processing, Computed tomography, 3D metrology, Statistical analysis, Statistical modeling, Bone, Tissues, Error analysis, Diagnostic tests

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Proceedings Article | 13 March 2013 Paper

Statistical shape representation with landmark clustering by solving the assignment problem

Bulat Ibragimov, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 8669, 86690E (2013) https://doi.org/10.1117/12.2006176

KEYWORDS: Shape analysis, Lung, Performance modeling, Image segmentation, Statistical modeling, Chest imaging, Statistical analysis, Medical imaging, Image registration, Databases

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Proceedings Article | 13 March 2013 Paper

Automated segmentation of MS lesions in brain MR images using localized trimmed-likelihood estimation

Alfiia Galimzianova, Žiga Špiclin, Boštjan Likar, Franjo Pernuš

Proceedings Volume 8669, 86693E (2013) https://doi.org/10.1117/12.2006381

KEYWORDS: Image segmentation, Brain, Magnetic resonance imaging, Tissues, Neuroimaging, Expectation maximization algorithms, Magnetism, Process modeling, 3D image processing, Image classification

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Proceedings Article | 28 February 2012 Paper

Characterization and modelling of the spatially- and spectrally-varying point-spread function in hyperspectral imaging systems for computational correction of axial optical aberrations

Žiga Špiclin, Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8215, 82150R (2012) https://doi.org/10.1117/12.908619

KEYWORDS: Point spread functions, Imaging systems, Image segmentation, Spatial resolution, Hyperspectral imaging, Optical aberrations, Modulation transfer functions, Image deconvolution, Image analysis, Image resolution

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Proceedings Article | 28 February 2012 Paper

Automated model-based calibration of imaging spectrographs

Matjaž Kosec, Miran Bürmen, Dejan Tomaževič, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8215, 82150A (2012) https://doi.org/10.1117/12.907780

KEYWORDS: Calibration, Imaging systems, Hyperspectral imaging, Spectrographs, Spectral calibration, Cameras, Image registration, Short wave infrared radiation, Computing systems, Line scan image sensors

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Proceedings Article | 23 February 2012 Paper

Improved classification and visualization of healthy and pathological hard dental tissues by modeling specular reflections in NIR hyperspectral images

Peter Usenik, Miran Bürmen, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8315, 83152N (2012) https://doi.org/10.1117/12.911623

KEYWORDS: Specular reflections, Dental caries, Tissues, Teeth, Hyperspectral imaging, Near infrared, Gold, Image classification, Visualization, Calculus

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Proceedings Article | 23 February 2012 Paper

Automatic measurement of vertebral body deformations in CT images based on a 3D parametric model

Darko Štern, Miran Bürmen, Vesna Njagulj, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 8315, 831510 (2012) https://doi.org/10.1117/12.911107

KEYWORDS: 3D modeling, 3D image processing, 3D metrology, Data modeling, Image segmentation, X-ray computed tomography, Computed tomography, Optical spheres, Radon, Spine

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Proceedings Article | 23 February 2012 Paper

Automated measurement of anterior and posterior acetabular sector angles

Bulat Ibragimov, Boštjan Likar, Franjo Pernuš, Tomaž Vrtovec

Proceedings Volume 8315, 83151U (2012) https://doi.org/10.1117/12.910873

KEYWORDS: Head, Image segmentation, Computed tomography, Optical spheres, Computer programming, Medical imaging, Spherical lenses, Magnetic resonance imaging, Process modeling, Image analysis

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Proceedings Article | 14 February 2012 Paper

3D-2D registration of cerebral angiograms based on vessel directions and intensity gradients

Uroš Mitrovic, Žiga Špiclin, Darko Štern, Primož Markelj, Boštjan Likar, Zoran Miloševic, Franjo Pernuš

Proceedings Volume 8314, 83141T (2012) https://doi.org/10.1117/12.910904

KEYWORDS: Image registration, 3D image processing, Gold, 3D imaging standards, Phase modulation, Angiography, Databases, Chromium, Navigation systems, Pathology

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Proceedings Article | 1 February 2012 Paper

Analysis of soft tissue near infrared spectra under dynamic pressure effects

Blaž Cugmas, Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8220, 822007 (2012) https://doi.org/10.1117/12.908614

KEYWORDS: Tissues, Skin, Near infrared, In vitro testing, In vivo imaging, Reflectivity, Tissue optics, Diffuse reflectance spectroscopy, Spectroscopy, Principal component analysis

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Proceedings Article | 30 January 2012 Paper

Hyperspectral laser-induced autofluorescence imaging of dental caries

Miran Bürmen, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8208, 82080E (2012) https://doi.org/10.1117/12.908670

KEYWORDS: Near infrared, Dental caries, Hyperspectral imaging, Teeth, Imaging spectroscopy, Imaging systems, Spectroscopy, Tissues, Calculus, Auto-fluorescence imaging

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Proceedings Article | 30 January 2012 Paper

Evaluation of cross-polarized near infrared hyperspectral imaging for early detection of dental caries

Peter Usenik, Miran Bürmen, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 8208, 82080G (2012) https://doi.org/10.1117/12.908763

KEYWORDS: Teeth, Near infrared, Hyperspectral imaging, Dental caries, Tissues, Transparency, Light sources, Natural surfaces, Imaging systems, Specular reflections

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Proceedings Article | 14 March 2011 Paper

Boundary detection by linear programming with application to lung fields segmentation

Bulat Ibragimov, Boštjan Likar, Franjo Pernuš

Proceedings Volume 7962, 796231 (2011) https://doi.org/10.1117/12.877705

KEYWORDS: Image segmentation, Fourier transforms, Computer programming, Lung, Image filtering, Medical imaging, Chest imaging, Databases, Linear filtering, X-rays

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Proceedings Article | 12 March 2011 Paper

Groupwise consistent image registration: a crucial step for the construction of a standardized near infrared hyper-spectral teeth database

Žiga Špiclin, Peter Usenik, Miran Bürmen, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7962, 79622A (2011) https://doi.org/10.1117/12.877940

KEYWORDS: Image registration, Near infrared, Teeth, Image restoration, Databases, Cameras, X-ray imaging, X-rays, Information visualization, Image processing

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Proceedings Article | 12 March 2011 Paper

Gradient-based 3D-2D registration of cerebral angiograms

Uroš Mitrović, Primož Markelj, Boštjan Likar, Zoran Miloševič, Franjo Pernuš

Proceedings Volume 7962, 79621P (2011) https://doi.org/10.1117/12.877541

KEYWORDS: Image registration, 3D image processing, Angiography, Gold, 3D image reconstruction, Image segmentation, X-rays, Calibration, X-ray imaging, Navigation systems

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Proceedings Article | 10 March 2011 Paper

Determination of vertebral pose in 3D by minimization of vertebral asymmetry

Tomaž Vrtovec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7962, 79620F (2011) https://doi.org/10.1117/12.877762

KEYWORDS: 3D image processing, 3D metrology, Computed tomography, Image registration, 3D modeling, Image segmentation, Spine, Medical imaging, Statistical modeling, Image analysis

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Proceedings Article | 10 March 2011 Paper

Segmentation of vertebral bodies in CT and MR images based on 3D deterministic models

Darko Štern, Tomaž Vrtovec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7962, 79620D (2011) https://doi.org/10.1117/12.877365

KEYWORDS: Image segmentation, Computed tomography, Magnetic resonance imaging, 3D modeling, 3D image processing, Bone, Spine, Tissues, Optimization (mathematics), 3D metrology

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Proceedings Article | 9 March 2011 Paper

Automated classification and visualization of healthy and pathological dental tissues based on near-infrared hyper-spectral imaging

Peter Usenik, Miran Bürmen, Tomaž Vrtovec, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7963, 796340 (2011) https://doi.org/10.1117/12.878264

KEYWORDS: Tissues, Teeth, Dental caries, Near infrared, Hyperspectral systems, Gold, Visualization, Image classification, X-ray imaging, Diagnostics

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Proceedings Article | 22 February 2011 Paper

Illumination system characterization for hyperspectral imaging

Jaka Katrašnik, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7891, 78910T (2011) https://doi.org/10.1117/12.873868

KEYWORDS: Imaging systems, Halogens, Hyperspectral imaging, Diffusers, Optical spheres, Cameras, Light sources, Light, Image filtering, Metals

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Proceedings Article | 22 February 2011 Paper

Correction of axial optical aberrations in hyperspectral imaging systems

Žiga Špiclin, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7891, 78910S (2011) https://doi.org/10.1117/12.873180

KEYWORDS: Point spread functions, Image restoration, Imaging systems, Hyperspectral systems, Image quality, Optical aberrations, Image processing, Deconvolution, Expectation maximization algorithms, Optical calibration

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Proceedings Article | 18 February 2011 Paper

A construction of standardized near infrared hyper-spectral teeth database: a first step in the development of reliable diagnostic tool for quantification and early detection of caries

Miran Bürmen, Peter Usenik, Aleš Fidler, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7884, 78840E (2011) https://doi.org/10.1117/12.875059

KEYWORDS: Teeth, Tissues, Near infrared, Dental caries, Diagnostics, Databases, Spectroscopy, Hyperspectral systems, Imaging systems, Near infrared spectroscopy

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Proceedings Article | 13 March 2010 Paper

Automated determination of the centers of vertebral bodies and intervertebral discs in CT and MR lumbar spine images

Darko Štern, Tomaž Vrtovec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7623, 762350 (2010) https://doi.org/10.1117/12.844567

KEYWORDS: Computed tomography, Magnetic resonance imaging, Spine, Image segmentation, 3D image processing, Statistical analysis, Correlation function, Feature extraction, 3D modeling, Algorithm development

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Proceedings Article | 13 March 2010 Paper

Evaluation of manual and computerized methods for the determination of axial vertebral rotation

Tomaž Vrtovec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7623, 76234W (2010) https://doi.org/10.1117/12.843528

KEYWORDS: 3D metrology, Computed tomography, Magnetic resonance imaging, 3D image processing, Holmium, Spine, Databases, Reliability, Medical imaging, Magnetism

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Proceedings Article | 24 February 2010 Paper

Geometrical calibration of an AOTF hyper-spectral imaging system

Žiga Špiclin, Jaka Katrašnik, Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7556, 75560I (2010) https://doi.org/10.1117/12.841727

KEYWORDS: Calibration, Imaging systems, Hyperspectral systems, Cameras, Optical aberrations, Distortion, Affine motion model, Optical filters, Image registration, Optical testing

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Proceedings Article | 24 February 2010 Paper

Spectral characterization and calibration of AOTF spectrometers and hyper-spectral imaging system

Jaka Katrašnik, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7556, 75560H (2010) https://doi.org/10.1117/12.840633

KEYWORDS: Calibration, Spectral calibration, Lamps, Spectrometers, Imaging systems, Hyperspectral systems, Argon, Optical filters, Spectral resolution, Crystals

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Proceedings Article | 24 February 2010 Paper

A practical approach to spectral calibration of short wavelength infrared hyper-spectral imaging systems

Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7556, 755614 (2010) https://doi.org/10.1117/12.841866

KEYWORDS: Spectral calibration, Hyperspectral systems, Imaging systems, Spectral resolution, Calibration, Short wave infrared radiation, Infrared radiation, Light sources, Infrared imaging, Crystals

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Proceedings Article | 27 March 2009 Paper

Automated determination of spinal centerline in CT and MR images

Darko Štern, Tomaž Vrtovec, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7259, 72594M (2009) https://doi.org/10.1117/12.811150

KEYWORDS: Spine, Computed tomography, Magnetic resonance imaging, 3D image processing, Image segmentation, 3D metrology, Lithium, Magnetism, 3D modeling, Tissues

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Proceedings Article | 27 March 2009 Paper

Contrast enhancement of subcutaneous blood vessel images by means of visible and near-infrared hyper-spectral imaging

Jaka Katrašnik, Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7259, 725927 (2009) https://doi.org/10.1117/12.812438

KEYWORDS: Veins, Tissues, Imaging systems, Near infrared, Hyperspectral systems, Visible radiation, Signal to noise ratio, CCD cameras, Cameras, Halogens

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Proceedings Article | 27 March 2009 Paper

Registration of EEG electrode positions to PET and fMRI images

Žiga Špiclin, Boštjan Likar, Franjo Pernuš

Proceedings Volume 7259, 72592J (2009) https://doi.org/10.1117/12.811892

KEYWORDS: Electrodes, Electroencephalography, Image registration, Positron emission tomography, Brain, Functional magnetic resonance imaging, Magnetic resonance imaging, Neuroimaging, Monte Carlo methods, Tomography

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Proceedings Article | 27 March 2009 Paper

A tool for registration verification based on gradient correspondence

Primoz Markelj, Franjo Pernus, Bostjan Likar

Proceedings Volume 7259, 725937 (2009) https://doi.org/10.1117/12.812349

KEYWORDS: Image registration, Visualization, Magnetic resonance imaging, Computed tomography, Visual analytics, Optical inspection, Image segmentation, Gold, Image processing, Bone

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Proceedings Article | 3 February 2009 Paper

Simulator for assessing the performance of polychromatic LED light sources

Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 7231, 72311F (2009) https://doi.org/10.1117/12.810054

KEYWORDS: Light emitting diodes, Light sources, Temperature metrology, Optical properties, Performance modeling, Machine vision, Manufacturing, Computing systems, Model-based design, Packaging

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Proceedings Article | 14 February 2008 Paper

Smart LED light source driver for machine vision system

Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 6910, 69100U (2008) https://doi.org/10.1117/12.764630

KEYWORDS: Light emitting diodes, Light sources, Cameras, Machine vision, Imaging systems, Signal processing, Image processing, Computing systems, Temperature metrology, Modulation

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Proceedings Article | 8 March 2007 Paper

Optimizing bone extraction in MR images for 3D/2D gradient based registration of MR and x-ray images

Primož Markelj, Dejan Tomaževič, Franjo Pernuš, Boštjan Likar

Proceedings Volume 6512, 651224 (2007) https://doi.org/10.1117/12.709259

KEYWORDS: X-rays, Image registration, Magnetic resonance imaging, X-ray imaging, Bone, Image segmentation, 3D image processing, X-ray computed tomography, Gold, 3D image reconstruction

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Proceedings Article | 5 March 2007 Paper

Determination of 3D location and rotation of lumbar vertebrae in CT images by symmetry-based auto-registration

Tomaž Vrtovec, Boštjan Likar, Franjo Pernuš

Proceedings Volume 6512, 65121Q (2007) https://doi.org/10.1117/12.710580

KEYWORDS: Image registration, Computed tomography, 3D image processing, 3D metrology, Mirrors, Spine, Silicon, 3D modeling, Lithium, Stereolithography

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Proceedings Article | 13 February 2007 Paper

Prediction of intensity and color degradation of LEDs

Miran Bürmen, Franjo Pernuš, Boštjan Likar

Proceedings Volume 6486, 64860M (2007) https://doi.org/10.1117/12.698987

KEYWORDS: Light emitting diodes, Manufacturing, Light sources and illumination, Light sources, Spectroscopy, Machine vision, Liquid phase epitaxy, Color prediction, Optical testing, Statistical analysis

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Proceedings Article | 10 March 2006 Paper

Evaluation of similarity measures for 3D/2D image registration

Darko Škerl, Boštjan Likar, Franjo Pernuš

Proceedings Volume 6144, 61442F (2006) https://doi.org/10.1117/12.652088

KEYWORDS: Image registration, 3D image reconstruction, X-rays, X-ray imaging, X-ray computed tomography, 3D image processing, Magnetic resonance imaging, Nano opto mechanical systems, Image segmentation, Chromium

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Proceedings Article | 29 April 2005 Paper

Curved planar reformation of CT spine data

Tomaz Vrtovec, Bostjan Likar, Franjo Pernus

Proceedings Volume 5747, (2005) https://doi.org/10.1117/12.595113

KEYWORDS: Spine, Image segmentation, Visualization, 3D image processing, 3D modeling, Computed tomography, Bone, Image analysis, Magnetic resonance imaging, Blood vessels

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Proceedings Article | 12 May 2004 Paper

Image segmentation by connected parametrical models

Marko Bukovec, Roel Truyen, Bostjan Likar, Rok Bernard, Franjo Pernus

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.533629

KEYWORDS: Image segmentation, Statistical analysis, Statistical modeling, Principal component analysis, Modeling, Shape analysis, Data modeling, Gold, Information technology, Transform theory

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Proceedings Article | 12 May 2004 Paper

Segmentation and segment connection of obstructed colon

Mario Medved, Roel Truyen, Bostjan Likar, Franjo Pernus

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.533665

KEYWORDS: Colon, Image segmentation, Lung, Virtual colonoscopy, Stomach, Tissues, Computed tomography, Abdomen, Forward error correction, Colorectal cancer

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Proceedings Article | 12 May 2004 Paper

Automated robust generation of compact 3D statistical shape models

Tomaz Vrtovec, Bostjan Likar, Dejan Tomazevic, Franjo Pernus

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.533470

KEYWORDS: Image segmentation, 3D modeling, Image registration, Statistical modeling, Principal component analysis, Shape analysis, Computed tomography, Statistical analysis, Medical imaging, 3D image processing

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Proceedings Article | 12 May 2004 Paper

Multifeature mutual information

Dejan Tomazevic, Bostjan Likar, Franjo Pernus

Proceedings Volume 5370, (2004) https://doi.org/10.1117/12.531007

KEYWORDS: Image registration, Positron emission tomography, Image segmentation, Image restoration, Medical imaging, Magnetic resonance imaging, Artificial intelligence, Statistical analysis, Image processing, Matrices

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Proceedings Article | 15 May 2003 Paper

Correction of multispectral MRI intensity non-uniformity via spatially regularized feature condensing

Uros Vovk, Franjo Pernus, Bostjan Likar

Proceedings Volume 5032, (2003) https://doi.org/10.1117/12.480182

KEYWORDS: Magnetic resonance imaging, Tissues, Image processing, Image segmentation, Brain mapping, Brain, Nonuniformity corrections, Feature extraction, Neuroimaging, Expectation maximization algorithms

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Proceedings Article | 9 May 2002 Paper

Rigid 2D/3D registration of intraoperative digital x-ray images and preoperative CT and MR images

Dejan Tomazevic, Bostjan Likar, Franjo Pernus

Proceedings Volume 4684, (2002) https://doi.org/10.1117/12.467193

KEYWORDS: X-rays, X-ray imaging, Image registration, X-ray computed tomography, Magnetic resonance imaging, 3D image processing, Gold, Image segmentation, X-ray sources, Digital x-ray imaging

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Proceedings Article | 9 May 2002 Paper

Nonparametric segmentation of multispectral MR images incorporating spatial and intensity information

Joze Derganc, Bostjan Likar, Franjo Pernus

Proceedings Volume 4684, (2002) https://doi.org/10.1117/12.467181

KEYWORDS: Image segmentation, Magnetic resonance imaging, Tissues, Expectation maximization algorithms, Image processing algorithms and systems, Image classification, Tumors, Brain, Nonuniformity corrections, Data modeling

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Proceedings Article | 9 May 2002 Paper

Segmentation-based retrospective correction of intensity nonuniformity in multispectral MR images

Bostjan Likar, Joze Derganc, Franjo Pernus

Proceedings Volume 4684, (2002) https://doi.org/10.1117/12.467120

KEYWORDS: Image segmentation, Magnetic resonance imaging, Nonuniformity corrections, Tissues, Image processing, Brain, Neuroimaging, Image analysis, Multispectral imaging, Image acquisition

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Proceedings Article | 6 June 2000 Paper

Correction of intensity variations by entropy minimization

Bostjan Likar, J. B. Antoine Maintz, Max Viergever, Franjo Pernus

Proceedings Volume 3979, (2000) https://doi.org/10.1117/12.387645

KEYWORDS: Image processing, Image acquisition, Cameras, Image filtering, Optimization (mathematics), Image analysis, Video, Image restoration, Linear filtering, Microscopy

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Proceedings Article | 24 June 1998 Paper

Point-based medical image matching: an automatic algorithm for point extraction

Bostjan Likar, Franjo Pernus

Proceedings Volume 3338, (1998) https://doi.org/10.1117/12.310846

KEYWORDS: Image registration, Medical imaging, Image processing, Distributed interactive simulations, Radiography, Digital imaging, Image restoration, Algorithm development, Head, Image visualization

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