Prof. Atanas P. Gotchev Profile

Prof. Atanas P. Gotchev

Professor at Tampere Univ

SPIE Involvement:

Editorial Board Member: Journal of Electronic Imaging | Author | Editor

Publications (38)

Proceedings Article | 18 June 2024 Poster

Enhancing deep diffractive neural networks via nonlinear metasurfaces

Linzhi Yu, Atanas Gotchev, Humeyra Caglayan

Proceedings Volume PC13017, PC130170U (2024) https://doi.org/10.1117/12.3016373

KEYWORDS: Neural networks, Geometrical optics, Free space optics, Nonlinear metamaterials, Nonlinear optics, Visible radiation, Optical transmission, Network architectures, Infrared radiation, Image segmentation

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SPIE Journal Paper | 27 October 2023 Open Access

JEI Updates Research Topic Categories

Zeev Zalevsky, Jenny Benois-Pineau, Laura Boucheron, Atanas Gotchev, Walter Kropatsch, Alexander Loui

JEI, Vol. 32, Issue 06, 060101, (October 2023) https://doi.org/10.1117/12.10.1117/1.JEI.32.6.060101

KEYWORDS: Image processing, Electronic imaging, Evolutionary algorithms, Video, Machine learning, Visual process modeling, Video processing, Super resolution, Data processing, Data modeling

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SPIE Journal Paper | 27 February 2019

Layered approach for improving the quality of free-viewpoint depth-image-based rendering images

Sergey Smirnov, Federica Battisti, Atanas Gotchev

JEI, Vol. 28, Issue 01, 013049, (February 2019) https://doi.org/10.1117/12.10.1117/1.JEI.28.1.013049

KEYWORDS: Cameras, Image segmentation, Visualization, Optical filters, RGB color model, Sensors, Image processing, Opacity, Binary data, Optical inspection

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Proceedings Article | 5 January 2017 Paper

Dynamic laser speckle metrology with binarization of speckle patterns

Elena Stoykova, Dimana Nazarova, Nataliya Berberova, Atanas Gotchev, Branimir Ivanov, Georgy Mateev

Proceedings Volume 10226, 102260R (2017) https://doi.org/10.1117/12.2262330

KEYWORDS: Speckle pattern, Speckle, Correlation function, Binary data, Algorithm development, Statistical analysis, Speckle analysis, Laser metrology, Speckle metrology, Nondestructive evaluation

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Proceedings Article | 16 March 2015 Paper

Preserving natural scene lighting by strobe-lit video

Olli Suominen, Atanas Gotchev

Proceedings Volume 9399, 939919 (2015) https://doi.org/10.1117/12.2185013

KEYWORDS: Cameras, Light sources and illumination, Image filtering, Video, Optical filters, Sensors, Image quality, Motion estimation, Image registration, Photography

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Proceedings Article | 16 March 2015 Paper

A perceptual quality metric for high-definition stereoscopic 3D video

F. Battisti, M. Carli, Alessio Stramacci, A. Boev, A. Gotchev

Proceedings Volume 9399, 939916 (2015) https://doi.org/10.1117/12.2086901

KEYWORDS: Video, Image quality, 3D image processing, Molybdenum, Visual process modeling, Visualization, 3D modeling, Video processing, Feature extraction, Distributed interactive simulations

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Proceedings Article | 16 March 2015 Paper

Real-time depth image-based rendering with layered dis-occlusion compensation and aliasing-free composition

Sergey Smirnov, Atanas Gotchev

Proceedings Volume 9399, 93990T (2015) https://doi.org/10.1117/12.2086895

KEYWORDS: Cameras, Image segmentation, Visualization, Image processing, 3D image processing, Image transmission, Electroluminescent displays, Video, Image quality, OpenGL

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Proceedings Article | 25 September 2014 Paper

Display-specific light-field analysis

Robert Bregovic, Péter Tamás Kovács, Tibor Balogh, Atanas Gotchev

Proceedings Volume 9117, 911710 (2014) https://doi.org/10.1117/12.2062010

KEYWORDS: Cameras, 3D displays, Visualization, Spatial resolution, Holography, 3D acquisition, Visual analytics, Light, Data acquisition, 3D visualizations

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Proceedings Article | 11 March 2014 Paper

A sliding-window transform-domain technique for denoising of DSPI phase maps

Assen Shulev, Atanas Gotchev

Proceedings Volume 9019, 90190N (2014) https://doi.org/10.1117/12.2048139

KEYWORDS: Denoising, Speckle, Speckle pattern, Phase shifts, Image filtering, Fourier transforms, Wavelets, Continuous wavelet transforms, Interferometry, Phase shifting

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Proceedings Article | 4 March 2014 Paper

On the performance of multirate filterbanks: Quantification of shift variance and cyclostationarity in the works of Til Aach

Robert Bregovic, Atanas Gotchev

Proceedings Volume 9019, 90190R (2014) https://doi.org/10.1117/12.2048568

KEYWORDS: Linear filtering, Electronic filtering, Filtering (signal processing), Signal processing, Nonlinear filtering, Optical filters, Image filtering, Image processing, Imaging systems, Wavelets

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Proceedings Article | 4 March 2014 Paper

A speed-optimized RGB-Z capture system with improved denoising capabilities

Aleksandra Chuchvara, Mihail Georgiev, Atanas Gotchev

Proceedings Volume 9019, 90190F (2014) https://doi.org/10.1117/12.2048564

KEYWORDS: Cameras, Sensors, 3D displays, Video, 3D image processing, Video acceleration, Denoising, RGB color model, Data fusion, Time of flight cameras

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Proceedings Article | 4 May 2012 Paper

Fast repurposing of high-resolution stereo video content for mobile use

Ali Karaoglu, Bong Ho Lee, Atanas Boev, Won-Sik Cheong, Atanas Gotchev

Proceedings Volume 8437, 84370V (2012) https://doi.org/10.1117/12.924508

KEYWORDS: Video, 3D displays, Stars, Sensors, Feature extraction, 3D acquisition, Statistical analysis, Fused deposition modeling, Detection and tracking algorithms, Image processing

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Proceedings Article | 21 February 2012 Paper

Deblocking of mobile stereo video

Lucio Azzari, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 8304, 830408 (2012) https://doi.org/10.1117/12.913253

KEYWORDS: Video, Video compression, Gaussian filters, Quantization, Video processing, Visualization, 3D video compression, Optical filters, Image filtering, Signal processing

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Proceedings Article | 16 February 2012 Paper

Parameters of the human 3D gaze while observing portable autostereoscopic display: a model and measurement results

Atanas Boev, Marianne Hanhela, Atanas Gotchev, Timo Utirainen, Satu Jumisko-Pyykkö, Miska Hannuksela

Proceedings Volume 8304, 830407 (2012) https://doi.org/10.1117/12.913555

KEYWORDS: Eye, 3D modeling, 3D displays, Cones, Visualization, 3D metrology, Autostereoscopic displays, 3D acquisition, Time metrology, Mobile devices

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We present an approach to measure and model the parameters of human point-of-gaze (PoG) in 3D space. Our model considers the following three parameters: position of the gaze in 3D space, volume encompassed by the gaze and time for the gaze to arrive on the desired target. Extracting the 3D gaze position from binocular gaze data is hindered by three problems. The first problem is the lack of convergence - due to micro saccadic movements the optical lines of both eyes rarely intersect at a point in space. The second problem is resolution - the combination of short observation distance and limited comfort disparity zone typical for a mobile 3D display does not allow the depth of the gaze position to be reliably extracted. The third problem is measurement noise - due to the limited display size, the noise range is close to the range of properly measured data. We have developed a methodology which allows us to suppress most of the measurement noise. This allows us to estimate the typical time which is needed for the point-of-gaze to travel in x, y or z direction. We identify three temporal properties of the binocular PoG. The first is reaction time, which is the minimum time that the vision reacts to a stimulus position change, and is measured as the time between the event and the time the PoG leaves the proximity of the old stimulus position. The second is the travel time of the PoG between the old and new stimulus position. The third is the time-to-arrive, which is the time combining the reaction time, travel time, and the time required for the PoG to settle in the new position. We present the method for filtering the PoG outliers, for deriving the PoG center from binocular eye-tracking data and for calculating the gaze volume as a function of the distance between PoG and the observer. As an outcome from our experiments we present binocular heat maps aggregated over all observers who participated in a viewing test. We also show the mean values for all temporal properties separately for x, y and z direction averaged over all observers. We show the typical size of a binocular area of interest for a portable autostereoscopic display, as well as typical time the 3D vision can react to sudden changes in a 3D scene.

Proceedings Article | 23 February 2011 Paper

Mobile 3D quality of experience evaluation: a hybrid data collection and analysis approach

Timo Utriainen, Jyrki Häyrynen, Satu Jumisko-Pyykkö, Atanas Boev, Atanas Gotchev, Miska Hannuksela

Proceedings Volume 7881, 788109 (2011) https://doi.org/10.1117/12.879214

KEYWORDS: Eye, Visualization, 3D displays, Calibration, Video, Cameras, 3D visualizations, 3D modeling, Head, Eye models

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Proceedings Article | 23 February 2011 Paper

Comparative study of autostereoscopic displays for mobile devices

Atanas Boev, Atanas Gotchev

Proceedings Volume 7881, 78810B (2011) https://doi.org/10.1117/12.879225

KEYWORDS: 3D displays, Visualization, 3D modeling, Eye, Autostereoscopic displays, Stereolithography, Mobile devices, Glasses, Visibility, 3D image processing

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Proceedings Article | 15 February 2011 Paper

A modified non-local mean inpainting technique for occlusion filling in depth-image-based rendering

Lucio Azzari, Federica Battisti, Atanas Gotchev, Marco Carli, Karen Egiazarian

Proceedings Volume 7863, 78631C (2011) https://doi.org/10.1117/12.872926

KEYWORDS: Video, Video processing, Cameras, Video compression, 3D video compression, Algorithm development, Detection and tracking algorithms, Image quality, Image compression, Gaussian filters

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Proceedings Article | 15 February 2011 Paper

Design of tuneable anti-aliasing filters for multiview displays

Atanas Boev, Robert Bregovic, Atanas Gotchev

Proceedings Volume 7863, 78630F (2011) https://doi.org/10.1117/12.873465

KEYWORDS: Visibility, Image filtering, Image processing, 3D image processing, Visualization, 3D displays, Image visualization, Computer simulations, Control systems, Tunable filters

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Proceedings Article | 11 February 2011 Paper

Subjective evaluation of mobile 3D video content: depth range versus compression artifacts

Satu Jumisko-Pyykkö, Tomi Haustola, Atanas Boev, Atanas Gotchev

Proceedings Volume 7881, 78810C (2011) https://doi.org/10.1117/12.879226

KEYWORDS: Video, 3D video compression, Visualization, Video compression, 3D displays, Quantization, Mobile devices, 3D modeling, Image quality, Cameras

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Proceedings Article | 5 May 2010 Paper

Comparative analysis of local binocular and trinocular depth estimation approaches

Sergey Smirnov, Atanas Gotchev, Miska Hannuksela

Proceedings Volume 7724, 77240H (2010) https://doi.org/10.1117/12.854765

KEYWORDS: Cameras, Chromium, Quality measurement, Image processing, Analytical research, Video, Sensors, Optimization (mathematics), Optical filters, Distance measurement

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Proceedings Article | 8 February 2010 Paper

A memory-efficient and time-consistent filtering of depth map sequences

Sergey Smirnov, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 7532, 753217 (2010) https://doi.org/10.1117/12.855811

KEYWORDS: Video, Optical filters, Digital filtering, Video compression, Filtering (signal processing), Image processing, Video processing, 3D image processing, 3D displays, Cameras

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Proceedings Article | 28 January 2010 Paper

Influence of camera parameters on the quality of mobile 3D capture

Mihail Georgiev, Atanas Boev, Atanas Gotchev, Miska Hannuksela

Proceedings Volume 7542, 75420U (2010) https://doi.org/10.1117/12.848001

KEYWORDS: Cameras, Calibration, Stereoscopic cameras, Coded apertures, 3D image processing, Motion estimation, Computer programming, Device simulation, Image sensors, 3D displays

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Proceedings Article | 20 February 2009 Paper

Classification and simulation of stereoscopic artifacts in mobile 3DTV content

Atanas Boev, Danilo Hollosi, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 7237, 72371F (2009) https://doi.org/10.1117/12.807185

KEYWORDS: Video, Visualization, Cameras, Video coding, 3D video streaming, Video processing, 3D displays, 3D vision, Quantization, Sensors

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Proceedings Article | 29 January 2009 Paper

Mobile 3D television: development of core technological elements and user-centered evaluation methods toward an optimized system

Atanas Gotchev, Aljoscha Smolic, Satu Jumisko-Pyykkö, Dominik Strohmeier, Gozde Bozdagi Akar, Philipp Merkle, Nikolai Daskalov

Proceedings Volume 7256, 72560J (2009) https://doi.org/10.1117/12.816728

KEYWORDS: Video, 3D displays, 3D video streaming, Video coding, Forward error correction, LCDs, Visualization, Standards development, Image quality, Televisions

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Proceedings Article | 29 February 2008 Paper

GPU-based algorithms for optimized visualization and crosstalk mitigation on a multiview display

Atanas Boev, Kalle Raunio, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 6803, 68030K (2008) https://doi.org/10.1117/12.761785

KEYWORDS: Image filtering, Visibility, 3D displays, Linear filtering, Visualization, Eye, Video, Volume rendering, Video acceleration, 3D video streaming

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Proceedings Article | 27 February 2008 Paper

An image registration technique aimed at super resolution on mobile devices

Mihail Georgiev, Ilian Todorov, Atanas Boev, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 6821, 68210A (2008) https://doi.org/10.1117/12.771895

KEYWORDS: Image registration, Digital signal processing, Super resolution, Image enhancement, Image fusion, Image processing, Image resolution, Cameras, Image filtering, Mobile devices

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Proceedings Article | 29 January 2007 Paper

Wavelet-based multiple description coding of 3-D geometry

Andrey Norkin, M. Oguz Bici, Gozde Bozdagi Akar, Atanas Gotchev, Jaakko Astola

Proceedings Volume 6508, 65082I (2007) https://doi.org/10.1117/12.704644

KEYWORDS: Wavelets, Distortion, 3D modeling, Reconstruction algorithms, Venus, Head, Visualization, Wavelet transforms, Statistical modeling, 3D image processing

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Proceedings Article | 9 June 2006 Paper

Threshold selection in transform-domain denoising of speckle pattern fringes

Assen Shulev, Atanas Gotchev, Alessandro Foi, Ilia Roussev

Proceedings Volume 6252, 625220 (2006) https://doi.org/10.1117/12.677284

KEYWORDS: Speckle, Fringe analysis, Denoising, Speckle pattern, Interference (communication), Fourier transforms, Signal processing, Digital filtering, Linear filtering, Filtering (signal processing)

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Proceedings Article | 9 June 2006 Paper

Interpolation and resampling in image processing and holography

Atanas Gotchev, Karen Egiazarian

Proceedings Volume 6252, 62521A (2006) https://doi.org/10.1117/12.677053

KEYWORDS: Convolution, Holography, Image processing, Signal processing, Statistical modeling, Fourier transforms, Finite impulse response filters, Digital holography, Digital imaging, Lithium

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Proceedings Article | 25 April 2006 Paper

Three-dimensional monochromatic light field synthesis with a deflectable mirror array device

Erdem Ulusoy, Vladislav Uzunov, Levent Onural, Haldun Ozaktas, Atanas Gotchev

Proceedings Volume 6187, 61871J (2006) https://doi.org/10.1117/12.668542

KEYWORDS: Mirrors, Algorithms, Diffraction, Optimization (mathematics), Analog electronics, Chemical elements, Detection and tracking algorithms, Near field diffraction, Associative arrays, Reconstruction algorithms

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Proceedings Article | 25 April 2006 Paper

An overview of the holographic display related tasks within the European 3DTV project

Levent Onural, Haldun Ozaktas, Elena Stoykova, Atanas Gotchev, John Watson

Proceedings Volume 6187, 61870T (2006) https://doi.org/10.1117/12.668540

KEYWORDS: Holography, 3D displays, Wavelets, Signal processing, Holograms, Computer generated holography, Associative arrays, Video, Spatial light modulators, Fourier transforms

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Proceedings Article | 12 September 2005 Paper

Face detection by optimal atomic decomposition

Vladislav Uzunov, Atanas Gotchev, Karen Egiazarian, Jaakko Astola

Proceedings Volume 5916, 59160G (2005) https://doi.org/10.1117/12.622564

KEYWORDS: Chemical species, Associative arrays, Facial recognition systems, Wavelets, Sensors, Principal component analysis, Feature extraction, Prototyping, Convolution, Detection and tracking algorithms

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Proceedings Article | 14 March 2005 Paper

Motion estimation algorithms based on complex halfband filters for OMAP platform

Chavdar Kalchev, Atanas Boev, Atanas Gotchev, Karen Egiazarian, Jaakko Astola

Proceedings Volume 5684, (2005) https://doi.org/10.1117/12.596496

KEYWORDS: Filtering (signal processing), Digital filtering, Motion estimation, Signal processing, Linear filtering, Digital signal processing, Wigner distribution functions, Electronic filtering, Wavelets, Mobile devices

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Proceedings Article | 1 March 2005 Paper

Lossless compression of Bayer pattern color filter arrays

Andriy Bazhyna, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 5672, (2005) https://doi.org/10.1117/12.587786

KEYWORDS: Image compression, Cameras, Image acquisition, Image processing, Image quality, Data conversion, Optical filters, Sensors, Reconstruction algorithms, Image enhancement

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Proceedings Article | 1 March 2005 Paper

Character recognition by best anisotropic local bases and neural networks

Vladislav Uzunov, Atanas Gotchev, Heikki Huttunen, Karen Egiazarian, Jaakko Astola

Proceedings Volume 5672, (2005) https://doi.org/10.1117/12.587543

KEYWORDS: Wavelets, Principal component analysis, Optical character recognition, Neural networks, Feature extraction, Anisotropy, Clouds, Neurons, Detection and tracking algorithms, Distance measurement

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Proceedings Article | 1 March 2005 Paper

Complex wavelets versus Gabor wavelets for facial feature extraction: a comparative study

Harish Essaky Sankaran, Atanas Gotchev, Karen Egiazarian, Jaakko Astola

Proceedings Volume 5672, (2005) https://doi.org/10.1117/12.595314

KEYWORDS: Wavelets, Feature extraction, Wavelet transforms, Facial recognition systems, Image processing, Imaging systems, Electronic imaging, Linear filtering, Lead, Modeling

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Proceedings Article | 23 February 2005 Paper

Near-lossless compression algorithm for Bayer pattern color filter arrays

Andriy Bazhyna, Atanas Gotchev, Karen Egiazarian

Proceedings Volume 5678, (2005) https://doi.org/10.1117/12.585788

KEYWORDS: Computer programming, Reconstruction algorithms, Image compression, Quantization, Visualization, Optical filters, Error analysis, Image restoration, Data compression, Digital cameras

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Proceedings Article | 28 May 2004 Paper

Feature extraction by best anisotropic Haar bases in an OCR system

Atanas Gotchev, Dmytro Rusanovskyy, Roumen Popov, Karen Egiazarian, Jaakko Astola

Proceedings Volume 5298, (2004) https://doi.org/10.1117/12.527065

KEYWORDS: Feature extraction, Optical character recognition, Databases, Wavelets, Neural networks, Image segmentation, Detection and tracking algorithms, Image resolution, Signal processing, Image classification

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Showing 5 of 38 publications

Proceedings Volume Editor (4)

SPIE Conference Volume | 7 April 2015

Image Processing: Algorithms and Systems XIII

SPIE Conference Volume | 18 March 2014

Image Processing: Algorithms and Systems XII

SPIE Conference Volume | 27 February 2013

Image Processing: Algorithms and Systems XI

SPIE Conference Volume | 9 March 2012

Image Processing: Algorithms and Systems X; and Parallel Processing for Imaging Applications II

Conference Committee Involvement (18)

Three-Dimensional Imaging, Visualization, and Display 2020

27 April 2020 | Online Only, California, United States

Image Processing: Algorithms and Systems XIII

10 February 2015 | San Francisco, California, United States

Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications 2015

10 February 2015 | San Francisco, California, United States

Image Processing: Algorithms and Systems XII

3 February 2014 | San Francisco, California, United States

Mobile Devices and Multimedia: Enabling Technologies, Algorithms, and Applications 2014

3 February 2014 | San Francisco, California, United States

Image Processing: Algorithms and Systems XI

4 February 2013 | Burlingame, California, United States

Multimedia on Mobile Devices 2013

4 February 2013 | Burlingame, California, United States

Multimedia on Mobile Devices 2012

25 January 2012 | Burlingame, California, United States

Image Processing: Algorithms and Systems X

23 January 2012 | Burlingame, California, United States

Multimedia on Mobile Devices 2011

25 January 2011 | San Francisco Airport, California, United States

Image Processing: Algorithms and Systems IX

24 January 2011 | San Francisco Airport, California, United States

Image Processing: Algorithms and Systems VIII

19 January 2010 | San Jose, California, United States

Image Processing: Algorithms and Systems VII

19 January 2009 | San Jose, California, United States

Image Processing: Algorithms and Systems VI

28 January 2008 | San Jose, California, United States

Image Processing: Algorithms and Systems V

29 January 2007 | San Jose, CA, United States

Image Processing: Algorithms and Systems V

16 January 2006 | San Jose, California, United States

Mathematical Methods in Pattern and Image Analysis

3 August 2005 | San Diego, California, United States

Image Processing: Algorithms and Systems IV

17 January 2005 | San Jose, California, United States

Showing 5 of 18 Conference Committees

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