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Atanas Gotchev   Professor  Other 
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Atanas Gotchev published an article in December 2018.
Top co-authors See all
Jaakko Astola

293 shared publications

Tampere University of Technology, Tampere International Center for Signal Processing, P.O. Box 553, FI-33101, FINLAND

Vladimir Lukin

282 shared publications

Department of Information and Communication Technologies, National Aerospace University, 61070 Kharkov, Ukraine

Karen Egiazarian

194 shared publications

Signal Processing Laboratory, Tampere University of Technology, Tampere 33720, Finland

Robert Bregovic┬┤

57 shared publications

Laboratory of Signal Processing, Tampere University of Technology, Tampere, Finland

Mihail Georgiev

20 shared publications

Department of Signal Processing, Tampere University of Technology, Tampere 33101, Finland

149
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96
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Publication Record
Distribution of Articles published per year 
(2001 - 2018)
Total number of journals
published in
 
35
 
Publications See all
PREPRINT 0 Reads 0 Citations Fast and Accurate Depth Estimation from Sparse Light Fields Aleksandra Chuchvara, Attila Barsi, Atanas Gotchev Published: 17 December 2018
ABS Show/hide abstract
We present a fast and accurate method for dense depth reconstruction from sparsely sampled light fields obtained using a synchronized camera array. In our method, the source images are over-segmented into non-overlapping compact superpixels that are used as basic data units for depth estimation and refinement. Superpixel representation provides a desirable reduction in the computational cost while preserving the image geometry with respect to the object contours. Each superpixel is modeled as a plane in the image space, allowing depth values to vary smoothly within the superpixel area. Initial depth maps, which are obtained by plane sweeping, are iteratively refined by propagating good correspondences within an image. To ensure the fast convergence of the iterative optimization process, we employ a highly parallel propagation scheme that operates on all the superpixels of all the images at once, making full use of the parallel graphics hardware. A few optimization iterations of the energy function incorporating superpixel-wise smoothness and geometric consistency constraints allows to recover depth with high accuracy in textured and textureless regions as well as areas with occlusions, producing dense globally consistent depth maps. We demonstrate that while the depth reconstruction takes about a second per full high-definition view, the accuracy of the obtained depth maps is comparable with the state-of-the-art results.
BOOK-CHAPTER 0 Reads 0 Citations Signal Processing Methods for Light Field Displays Robert Bregovic, Erdem Sahin, Suren Vagharshakyan, Atanas Go... Published: 14 October 2018
Handbook of Signal Processing Systems, doi: 10.1007/978-3-319-91734-4_1
DOI See at publisher website ABS Show/hide abstract
This chapter discusses the topic of emerging light field displays from a signal processing perspective. Light field displays are defined as devices which deliver continuous parallax along with the focus and binocular visual cues acting together in rivalry-free manner. In order to ensure such functionality, one has to deal with the light field, conceptualized by the plenoptic function and its adequate parametrization, sampling and reconstruction. The light field basics and the corresponding display technologies are overviewed in order to address the fundamental problems of analyzing light field displays as signal processing channels, and of capturing and representing light field visual content for driving such displays. Spectral analysis of multidimensional sampling operators is utilized to profile the displays in question, and modern sparsification approaches are employed to develop methods for high-quality light field reconstruction and rendering.
PROCEEDINGS-ARTICLE 0 Reads 0 Citations Unsupervised calibration of RGB-NIR capture pairs utilizing dense multimodal image correspondences Filipe Gama, Mihail Georgiev, Atanas Gotchev Published: 01 September 2018
2018 26th European Signal Processing Conference (EUSIPCO), doi: 10.23919/eusipco.2018.8553454
DOI See at publisher website
Article 0 Reads 1 Citation Time-of-Flight Range Measurement in Low-Sensing Environment: Noise Analysis and Complex-Domain Non-Local Denoising Mihail Georgiev, Robert Bregovic, Atanas Gotchev Published: 01 June 2018
IEEE Transactions on Image Processing, doi: 10.1109/tip.2018.2807126
DOI See at publisher website
PROCEEDINGS-ARTICLE 0 Reads 0 Citations ANALYSIS OF ACCOMMODATION CUES IN HOLOGRAPHIC STEREOGRAMS Jani Makinen, Erdem Sahin, Atanas Gotchev Published: 01 June 2018
2018 - 3DTV-Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV-CON), doi: 10.1109/3dtv.2018.8478586
DOI See at publisher website
PROCEEDINGS-ARTICLE 0 Reads 0 Citations VIEWING SIMULATION OF INTEGRAL IMAGING DISPLAY BASED ON WAVE OPTICS Ugur Akpinar, Erdem Sahin, Atanas Gotchev Published: 01 June 2018
2018 - 3DTV-Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV-CON), doi: 10.1109/3dtv.2018.8478568
DOI See at publisher website
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