APPARATUS AND METHOD FOR ADAPTIVE 3D NOISE REDUCTION

Title:

APPARATUS AND METHOD FOR ADAPTIVE 3D NOISE REDUCTION

Document Type and Number:

WIPO Patent Application WO2006010275

Kind Code:

A3

Abstract:

A non-iterative 3D processing method and system is disclosed for generic noise reduction. The 3D noise reducer is based on a simple conversion of the five types of noise to equivalent additive noise of varying statistics. The proposed technique comprises also an efficient temporal filtering technique which combines Minimization of Output Noise Variance (MNV) and Embedded Motion Estimation (EME). The proposed temporal filtering technique may be furthermore combined with classical motion estimation and motion compensation for more efficient noise reducer. The proposed technique comprises also a spatial noise reducer which combines Minimum Mean Squared Error (MMSE) with robust and effective shape adaptive windowing (SAW) is utilized for smoothing random noise in the whole image, particularly for edge regions. Another modification to MMSE is also introduced for handling banding effects for eventual excessive filtering in slowly varying regions.

Inventors:

NGUYEN DUONG TUAN (CA)
THI THANH HIEN NGUYEN (CA)
DINH CHON TAM LE (CA)

Application Number:

PCT/CA2005/001194

Publication Date:

March 30, 2006

Filing Date:

July 29, 2005

Export Citation:

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Assignee:

ALGOLITH INC (CA)
NGUYEN DUONG TUAN (CA)
THI THANH HIEN NGUYEN (CA)
DINH CHON TAM LE (CA)

International Classes:

G06V10/30; (IPC1-7): H04N5/213

Foreign References:

US6281942B1	2001-08-28
US6067125A	2000-05-23

Other References: