Apparatus and method for decoding differently encoded multi-level and binary image data, the later corresponding to a color in the original image
First Claim
Patent Images
1. 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.
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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.
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Citations
12 Claims
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1. An image decoding apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image decoding method comprising the steps of:
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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. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification