[Statlist] Next talk: Friday, June 29, 2012 with Joseph Salmon, Duke University, Durham, NC, USA

[Susanne Kaiser-Heinzmann]

Proff. P. Buehlmann - L. Held - H.R. Kuensch -
M. Maathuis -  S. van de Geer - M. Wolf


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We are glad to announce the following talk

Friday, June 29, 2012, 15.15h, HG G 19.1

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by Joseph Salmon (Duke University, Durham, NC, USA)

Title:
"Poisson noise reduction with non-local PCA"


Abstract:
Photon-limited imaging, which arises in applications such as spectral  
imaging, night vision, nuclear medicine and astronomy, occurs when the  
number of photons collected by a sensor is small relative to the  
desired image resolution. Typically a Poisson distribution is used to  
model these observations, and the inherent heteroscedasticity of the  
data combined with standard noise removal methods yields significant  
artifacts. This paper introduces a novel denoising algorithm for  
photon-limited images which combines elements of dictionary learning  
and sparse epresentations for image patches. The method employs both  
an adaptation of Principal Component Analysis (PCA) for Poisson noise.
A comprehensive empirical evaluation of the performance of the  
proposed method helps characterize the performance of this approach in  
very low light regimes relative to other state-of-the-art denoising  
methods. The results reveal that, despite its implicity, PCA-flavored  
denoising appears to be highly competitive in the presence of  
significant Poisson noise.

The abstract is also to be found here:  http://stat.ethz.ch/events/research_seminar

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ETH Z�rich
Seminar f�r Statistik
R�mistrasse 101
CH-8092 Z�rich
Tel: +41 446326518 Fax: +41 446321228
sekretariat using stat.math.ethz.ch







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