Image transcoding

Image analysis – Image compression or coding

Reexamination Certificate

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Reexamination Certificate

active

07440626

ABSTRACT:
A method transcodes an image in the form of an encoded input bitstream. The input bitstream includes quality layers, each quality layer includes a resolution levels, each resolution level includes components, each component includes precincts, and each precinct includes a packet partition location, a header length, and a body length. The input bitstream is decoded partially to obtain a structure of the encoded input bitstream. Coordinates of a region-of-interest in the image are specified, and progressive parameters are defined. The partially decoded input bitstream is then encoded according to the structure, the coordinates, and the progressive parameters to obtain an encoded output bitstream.

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Wang et al., “Bitplane-by-bitplane shift (BbBShift)—A suggestion for JPEG 2000 Region of Interest image coding,” IEEE Signal Processing Letters, vol. 9, No. 5, May 2002.
Skodras et al., “The JPEG 2000 still image compression standard,” IEEE Signal Processing Magazine, Sep. 2001.
Liu et al., “A new JPEG 2000 region-of-interest image coding method: partial significant bitplanes shift,” IEEE Signal Processing Letters, vol. 10, No. 2, Feb. 2003.
Rosenbaum et al., “Flexible, dynamic and compliant region of interest coding in JPEG 2000,” IEEE Proceeding of ICIP, Rochester, New York, Sep. 2002.

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