Compression of partially-masked image data

Details Compression of partially-masked image data Compression of partially-masked image data

2007-10-23

2007-10-23

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

C382S239000, C382S238000, C382S248000

Reexamination Certificate

active

10721863

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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