Image analysis – Image enhancement or restoration – Edge or contour enhancement
Reexamination Certificate
2007-07-03
2007-07-03
Rogers, Scott A. (Department: 2625)
Image analysis
Image enhancement or restoration
Edge or contour enhancement
C375S240270
Reexamination Certificate
active
09506728
ABSTRACT:
A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S0, S1, and S2, which are centered around a block boundary. If a default mode is selected then frequency information of the surroundings of the block boundary is obtained. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary. The frequency domain adjustment is then applied to a spatial domain. Or, a DC offset mode can be selected to reduce blocking artifacts in smooth regions where there is little motion.
REFERENCES:
patent: 5590064 (1996-12-01), Astle
patent: 5629778 (1997-05-01), Reuman
patent: 5677736 (1997-10-01), Suzuki et al.
patent: 5903679 (1999-05-01), Park
patent: 6028967 (2000-02-01), Kim et al.
Avideh Zakhor, “Iterative Procedures for Reduction of Blocking Effects In Transform Image Coding”, IEEE Transactions On Circuits and Systems For Video Technology, vol. 2, No. 1, pp. 91-95 (Mar. 1992).
Yongyi Yang et al., “Regularized Reconstructions to Reduce Blocking Artifacts of Block Discrete Cosine Transform Compressed Images”, IEEE Transactions On Circuits and Systems For Video Technology, vol. 3, No. 6, pp. 421-432 (Dec. 1993).
Gary J. Sullivan et al., “Motion Compensation for Video Compression Using Control Grid Interpolation”, IEEE International Conference, pp. 2713-2716 (1991).
G. de Haan et al., “IC For Motion-Compensation 100Hz TV With Natural-Motion Movie-Mode”, IEEE Transactions On Consumer Electronics, vol. 42, pp. 165-174 (Feb. 1996).
Taner Özcelik et al., “Image and Video Compression Algorithms Based on Recovery Techniques Using Mean Field Annealing”, Proceedings of the IEEE, vol. 83, No. 2, pp. 304-316, Feb. 1995.
Yasuyuki Nakajima et al., “A PEL Adaptive Reduction of Coding Artifacts for MPEG Video Signals”, pp. 928-932, IEEE, 1994.
Kim Hyun Mun
Kim Sung Deuk
Lee Young Su
Ra Jong Beom
KED & Associates LLP
Rogers Scott A.
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