Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

1995-03-10

1998-06-02

Boudreau, Leo

Image analysis

Image compression or coding

Parallel coding architecture

382240, 348397, H04N 750

Patent

active

057613427

ABSTRACT:
A color image, including both a binary color image and a multivalue color image, can be encoded without any image degradation, and an image can be immediately checked at the time of encoding.
In a color image encoding apparatus for encoding a multivalue color image, an image is separated into a binary color image and a multivalue color image, and the binary color image is hierarchically encoded.
A feature portion is extracted from an original image, and the extracted feature portion is binarized to form a binary color image. The binary color image is encoded in accordance with information preservation encoding, and a difference image between the original image and the binary color image is hierarchically encoded.

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Langdon et al., "Compression of Black-White Images with Arithmetic Coding", in IEEE Communications, vol. COM-29, No. 6, pp. 858-867, Jun. 1981.

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