Image analysis – Image compression or coding
Reexamination Certificate
2005-02-15
2005-02-15
Do, Anh Hong (Department: 2624)
Image analysis
Image compression or coding
C382S239000, C348S607000
Reexamination Certificate
active
06856699
ABSTRACT:
The invention provides a method of and a device for coding (10*) an image sequence g(i,j,k)). The device (10*) has a noise filter (12) for noise filtering (12) the image sequence (g(i,j,k)), and for regarding the noise filtering (12) as a rate-distortion optimization problem in order to adapt the response of the noise filter (12). In particular, a filter parameter set (C) is determined to adapt the response of the filter (12) in that the image sequence (g(i,j,k)) is encoded using an optimal bit-budget, which is the bit-budget used for compressing a noise-free image sequence, and the distortion for the given bit-budget is minimized. A solution of the rate-distortion problem is proposed that calculates (12) the filter parameter set (C) by a Lagrange multiplier method. Separate minimization is used to determine each parameter of the parameter set (C) independently. In a practical embodiment, a spatial adaptive weighted averaging (SAWA) filtering (23) is used to estimate the bit budget (Rf*) and to pre-filter the image sequence g(i,j,k)).
REFERENCES:
patent: 6192080 (2001-02-01), Sun et al.
patent: 6233278 (2001-05-01), Dieterich
patent: 6281942 (2001-08-01), Wang
patent: 6366704 (2002-04-01), Ribas-Corbera et al.
patent: 6434196 (2002-08-01), Sethuraman et al.
patent: 9704597 (1997-02-01), None
“Noise-Robust Recursive Motion Estimation for H.263-Baseed Videoconferencing Systems”, S. Olivieri, L. Albani, G. De Haan, Proc. MMSP, 1999, pp. 345-350.
“Bit Allocation for Dependent Quantization with Applications to Multiresolution and MPEG Video Coders”, Kannan Ramchandran, Antonio Ortega and Martin Vetterli, IEEE Transations on Image Processing, vol. 3, No. 5, Sep. 1994, pp. 533-545.
R.P. Kleihorst, A. Van Der Werf, W.H.A. Bruls, W.F.J. Verhaegh, and JE. Waterlander, “MPEG2 Video Encoding in Consumer Electronics”, J. VLSI Signal Processing Syst., vol. 17, pp. 1-13, 1997.
A.K. Katsaggelos, J.N. Driessen, S.N. Efstratiadis, and R.L. Lagendijk, “Spatio-Temporal Motion Compensated Noise Filtering of Image Sequences”, Proc. SPIE Conf. Visual Commun. and Image Processing, vol. 1199, pp. 61-70, 1989.
Y. Shoham and A. Gersho, “Efficient Bit Allocation for an Arbitrary Set of Quantizers”, IEEE Trans. Acoust. Speech, Signal Processing, vol. 36, pp. 1445-1453, Sep. 1988.
B.K. Natarajan, “Filtering Random Noise from Deterministic Signals Via Data Compression”, IEEE Trans. Signal Processing, vol. 43, pp. 2595-2605, Nov. 1995.
M. K. Ozkan, M.I. Sezan and A.M. Tekalp, “Adaptive Motion-Compensated Filtering of Noisy Image Sequences”, IEEE Trans. Circuits Syst. Video Technol., vol. 3, pp. 277-390, Aug. 1993.
“A Simple Rate-Distortion Model, Parameter Estimation, and Application to Real-time Rate Control for DCT-Based Coders” Webb et al, Proceedings International Conference on Image Processing, Santa Barbara, CA, USA Oct. 26-29, 1997.
Do Anh Hong
Gross Russell
Koninklijke Philips Electronics , N.V.
LandOfFree
Coding and noise filtering an image sequence does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coding and noise filtering an image sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coding and noise filtering an image sequence will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3498129