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US 5,668,646 AGranted
Apparatus and method for decoding differently encoded multi-level and binary image data, the later corresponding to a color in the original image
AssigneeCanon Kabushiki Kaisha
InventorsAkihiro Katayama, Yasuhiko Yasuda, Shigeo Kato, Hirokazu Uchio
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Abstract
This invention relates to an image processing apparatus having a function of encoding or decoding image data and discloses a technique for extracting an image feature, especially a thin image portion of a specific color of an image, and for encoding the thin image portion with high efficiency to minimize degradation of image quality by selecting an appropriate encoding method.
Claims12
An image decoding apparatus comprising:
- a) input means for inputting multi-level image data encoded by a first encoding method and binary image information encoded by a second encoding method which is different from the first encoding method;
- b) decoding means for decoding the multi-level image data and the binary image information;
- and
- c) synthesizing means for synthesizing the multi-level image data and the binary image information decoded by said decoding means and outputting synthesized image data,
- wherein both the multi-level image data and the binary image information are obtained from the same original image and wherein the binary image information corresponds to a color in the original image, the color being represented by a plurality of color component data.
2 more elements
An image decoding method comprising the steps of:
- a) inputting multi-level image data encoded by a first encoding method and binary image information encoded by a second encoding method which is different from the first encoding method;
- b) decoding the multi-level image data and the binary image information;
- and
- c) synthesizing the multi-level image data and the binary image information decoded in said step (b) and outputting synthesized image data,
- wherein both the multi-level image data and the binary image information are obtained from the same original image and wherein the binary image information corresponds to a color in the original image, the color being represented by a plurality of color component data.
2 more elements
Dependencies are inferred from the claim text.