Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Patent
1999-01-19
2000-05-02
Lee, Thomas D.
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
382239, 382238, 382248, G06K 936
Patent
active
060582146
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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Chen, Homer H. Et al.: A Block Transform Coder for Arbitrarily Shaped Image Segments, IEEE 1994, AT&T Bell Laboratories, Holmdel, NJ, pp. 85-89.
Bottou Leon
Pigeon Steven
AT&T Corp.
Chen Wenpeng
Lee Thomas D.
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