Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Patent
1994-09-21
1998-05-05
Boudreau, Leo
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
382246, 382248, G06K 936, G06K 946
Patent
active
057487863
ABSTRACT:
A method and apparatus for encoding and decoding data is described. The present invention includes a method and apparatus for generating transformed signals in response to input data. In one embodiment, the transformed signals are generated using a reversible wavelet transform. The present invention also includes a method and apparatus for compressing the transformed signals into data representing a losslessly compressed version of the input data. In one embodiment, the present invention decomposes the input data using a non-minimal length reversible filter. The decomposition may be performed using multiple one-dimension filters.
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Allen James D.
Boliek Martin
Schwartz Edward L.
Zandi Ahmad
Boudreau Leo
Ricoh & Company, Ltd.
Ricoh Corporation
Tran Phuoc
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