Image analysis – Image compression or coding – Quantization
Patent
1997-06-16
1999-11-02
Tadayon, Bijan
Image analysis
Image compression or coding
Quantization
382240, 382232, 382239, G06K 930, G06K 946, G06K 938
Patent
active
059785179
ABSTRACT:
In order to progressively transmit a digital image (IM), a method for coding the image comprises the division (E1) of the image into vectors (V.sub.m,n), the selection (E2) of a code vector (VC.sub.d) associated with an index (A.sub.d) for each of the image vectors, and the replacement (E2) of the image vectors by the indices associated with the selected code vectors, in order to produce a plane of indices (PI) representing the image. The method comprises the steps of sub-sampling (E3) the plane of indices (PI) into sub-planes of indices (SPI.sub.1 to SPI.sub.F) respectively comprising indices selected from the plane of indices, and ordering (E4) the sub-planes of indices according to a predetermined order before transmitting them.
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Dierieck Claude
Henry Felix
Canon Kabushiki Kaisha
Novik Dmitry A.
Tadayon Bijan
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