Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Reexamination Certificate
2007-04-12
2008-11-11
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
C382S248000
Reexamination Certificate
active
07450772
ABSTRACT:
Wavelet coding of partially-masked image information may be made faster by either of two embodiments of the present invention. In a first embodiment, quick convergence is obtained by performing wavelet encoding in stages, each stage associated with a predetermined wavelet scale. By advancing the stages from finest scale to coarsest scale, coefficients of masked wavelets are identifies early in the coding process. In a second embodiment, quick convergence is obtained by introducing overshoot techniques when masked coefficients are identified, modified and image data is reconstructed therefrom.
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Bottou Leon
Pigeon Steven
AT&T Intellectual Property II L.P.
Chen Wenpeng
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