Prof. Jaakko T. Astola
Professor, emeritus at Tampere Univ
SPIE Involvement:
Author | Editor | Instructor
Publications (140)

Proceedings Article | 17 March 2015 Paper
Proceedings Volume 9394, 93940K (2015) https://doi.org/10.1117/12.2085465
KEYWORDS: Image quality, Molybdenum, Visualization, Neural networks, Databases, Image visualization, Neurons, Image denoising, Statistical analysis, Fabry–Perot interferometers

Proceedings Article | 19 February 2013 Paper
Proceedings Volume 8655, 86550E (2013) https://doi.org/10.1117/12.2000062
KEYWORDS: Visualization, Image quality, Databases, Interference (communication), Molybdenum, Visual analytics, Image analysis, Image visualization, Image processing, Image compression

Proceedings Article | 11 September 2012 Paper
Vladimir Katkovnik, Jaakko Astola
Proceedings Volume 8413, 84130N (2012) https://doi.org/10.1117/12.965879
KEYWORDS: Compressed sensing, Speckle, Data modeling, Spatial light modulators, Speckle metrology, Current controlled current source, Sensors, Free space, Speckle imaging, Image filtering

Proceedings Article | 5 May 2012 Paper
Artem Migukin, Vladimir Katkovnik, Jaakko Astola
Proceedings Volume 8429, 84291N (2012) https://doi.org/10.1117/12.922343
KEYWORDS: Reconstruction algorithms, Wave propagation, Phase retrieval, Sensors, Graphics processing units, Matrices, Algorithm development, Image processing, Free space optics, Spatial light modulators

Proceedings Article | 2 February 2012 Paper
Proceedings Volume 8295, 829519 (2012) https://doi.org/10.1117/12.906393
KEYWORDS: Image quality, Visualization, Image visualization, Image compression, Molybdenum, Databases, Discrete wavelet transforms, Image analysis, Photography, Image processing

Showing 5 of 140 publications
Proceedings Volume Editor (27)

SPIE Conference Volume | 3 February 2011

SPIE Conference Volume | 26 January 2010

SPIE Conference Volume | 21 August 2009

Showing 5 of 27 publications
Conference Committee Involvement (28)
Mathematics of Data/Image Pattern Coding, Compression, and Encryption with Applications XIV
21 August 2011 | San Diego, California, United States
Image Processing: Algorithms and Systems IX
24 January 2011 | San Francisco Airport, California, United States
Mathematics of Data/Image Pattern Recognition, Compression, and Encryption, with Applications XIII
3 August 2010 | San Diego, California, United States
Image Processing: Algorithms and Systems VIII
19 January 2010 | San Jose, California, United States
Mathematics of Data/Image Coding, Compression, and Encryption with Applications XII
3 August 2009 | San Diego, California, United States
Showing 5 of 28 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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