Noise reduction in a digital image by factorial analysis of...

Image analysis – Image enhancement or restoration – Image filter

Reexamination Certificate

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C382S264000, C382S260000

Reexamination Certificate

active

07376283

ABSTRACT:
The invention concerns a method which consists in processing in a central unit (4) the digitized image (1) obtained by sensing noisy radiation. The image (1) is considered as a table of pixel intensity values, which is broken down into p elementary tables of n pixels so as to subsequently order them into a processing table with p lines of n columns; applying to said table a factorial analysis method, to deduce therefrom the n significant factors; then reconstituting a reconstructed processing table taking into account the most significant factors, and in deducing therefrom a reconstituted image wherein the high-frequency noise is reduced, maintaining a satisfactory contrast.

REFERENCES:
patent: WO 01/72032 (2001-09-01), None
Hannequin et al “The determination of the number of statistically signifigant factors ect” Physics in Medicine and Biology Spet. 1989 1213-1227.
Aebersold et al. “Quantitative interpretation of HRTEM images using multivariate statistics: the case f the (gamma, gamma')- interface in a NI base superalloy” Ultramicroscopy Feb. 1996 p. 171-189.
Aebersold et al, “Quantitative interpretation of HRTEM images using multivariate statistics etc.”, Ultramicroscopy, Feb. 1996, p. 171-189.
Hannequin et al, “The determination of the number of statistically significant factors etc.”, Physics in Medicine and Biology, Sep. 1989, p. 1213-1227.
Schmidlin et al, “Application of factor analysis for scintigraphic picture processing”, Proc. 4th Int'l Conf. on Inf. Proc. 1975, p. 80-90.
Hannequin et al, “Analysis of image sequences in nuclear medicine etc.”, Journal de Medicine Nucleaire et Biophysique, 1989, p. 125-137.

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