Prof. Karen O. Eguiazarian
at Tampere Univ
SPIE Involvement:
Author | Editor | Instructor
Publications (129)

Proceedings Article | 9 August 2023 Paper
Proceedings Volume 12630, 1263012 (2023) https://doi.org/10.1117/12.2668352
KEYWORDS: Education and training, Phase reconstruction, Sensors, Wavefronts, Machine learning, Phase imaging, Spatial light modulators, Wave propagation, Imaging systems, Diffraction

Proceedings Article | 20 May 2022 Presentation + Paper
Proceedings Volume 12136, 121360M (2022) https://doi.org/10.1117/12.2621041
KEYWORDS: RGB color model, Hybrid optics, Imaging systems, Sensors, Spatial light modulators, Signal to noise ratio, Point spread functions, Cameras, Optimization (mathematics), Image sensors

Proceedings Article | 5 March 2021 Poster + Presentation + Paper
Proceedings Volume 11653, 116531F (2021) https://doi.org/10.1117/12.2581428
KEYWORDS: Phase retrieval, Neural networks, Sensors, Optical networks, Image sensors, Convolutional neural networks

SPIE Journal Paper | 29 January 2021 Open Access
Vladimir Katkovnik, Igor Shevkunov, Karen Eguiazarian
OE, Vol. 60, Issue 01, 013108, (January 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.1.013108
KEYWORDS: Phase retrieval, Algorithm development, Data processing, Sensors, Reconstruction algorithms, Refractive index, Wavefronts, Optical engineering, Optical filters, Spectroscopy

SPIE Journal Paper | 5 January 2021 Open Access
OE, Vol. 60, Issue 05, 051204, (January 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.5.051204
KEYWORDS: Optical transfer functions, Point spread functions, Imaging systems, RGB color model, Electronic filtering, Image filtering, Sensors, Optical engineering, Filtering (signal processing), Optical filters

Showing 5 of 129 publications
Proceedings Volume Editor (14)

SPIE Conference Volume | 7 April 2015

SPIE Conference Volume | 18 March 2014

SPIE Conference Volume | 27 February 2013

SPIE Conference Volume | 3 February 2011

Showing 5 of 14 publications
Conference Committee Involvement (14)
Image Processing: Algorithms and Systems XIII
10 February 2015 | San Francisco, California, United States
Image Processing: Algorithms and Systems XII
3 February 2014 | San Francisco, California, United States
Image Processing: Algorithms and Systems XI
4 February 2013 | Burlingame, California, United States
Image Processing: Algorithms and Systems X
23 January 2012 | Burlingame, California, United States
Image Processing: Algorithms and Systems IX
24 January 2011 | San Francisco Airport, California, United States
Showing 5 of 14 Conference Committees
Course Instructor
SC761: Novel Spatially Adaptive Anisotropic Local Approximation Techniques in Image Processing
This half-day course presents a practical and application oriented overview of novel advanced image processing algorithms. Briefly the idea is as follows: the concept of adaptive local polynomial approximation (LPA) has been developed to deal with anisotropic signals. This type of method searches for a largest local star-shaped neighborhood where LPA fits well to data. It is typically applied in a point-wise manner and defines a nonlinear varying scale (window size and shape) adaptive filter. This adaptation is based on recent adaptive estimation results that have been obtained in mathematical statistics. Local versions of the local maximum/quasi likelihood are used for non-Gaussian models. Special algorithms have been designed for photon-limited imaging based on the Poisson distribution of data. Overall, the techniques covered in the course belong to the general class of nonlinear spatially adaptive filters and they demonstrate state-of-art performance and on many occasions visually and quantitatively outperform the best methods currently in use. A wide scope of imaging problems is considered: denoising Gaussian and non-Gaussian images, non-blind deblurring, blind multichannel deblurring, super-resolution imaging, denoising poissonian signals, multiresolution imaging, edge detection, color imaging, etc. The algorithms are implemented in Matlab codes and based on efficient frequency domain calculations.
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