Image analysis – Image compression or coding – Adaptive coding
Patent
1998-04-27
2000-05-02
Lee, Thomas D.
Image analysis
Image compression or coding
Adaptive coding
382236, 382243, G06K 936, G06K 946
Patent
active
060582138
ABSTRACT:
An apparatus, for use in a context-based arithmetic encoding of a binary shape signal, generates a bordered block having a border of width D around a target block based on the binary shape signal which includes a plurality of blocks of P.times.Q pixels having one of a larger and a smaller binary values, P and Q being positive integers, respectively, and the target block is one of the blocks of P.times.Q pixels. In order to produce the bordered block, the apparatus first calculates a weighted mean for each of the border pixels in the bordered block by using N number of neighboring pixels, N being a positive integer. Each of the weighted means is compared with the larger binary value to thereby assign either the larger or the smaller binary value to each of the border pixels. After the binary value to be assigned to each of the border pixels is determined, the apparatus constructs the bordered block based on the binary values assigned to the border pixels and the binary shape signal.
REFERENCES:
patent: 5455874 (1995-10-01), Ormsby et al.
patent: 5745603 (1998-04-01), Rust
patent: 5815097 (1998-09-01), Schwartz et al.
patent: 6005980 (1999-12-01), Eifrig et al.
Chen Wenpeng
Daewoo Electronics Co. Ltd.
Lee Thomas D.
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