Processing for accurate reproduction of symbols and other high-frequency areas in a color image
First Claim
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1. An image processing apparatus comprising:
- binarizing means for binarizing color image data;
detection means for detecting a symbol area in said color image data;
color reduction means for obtaining, from N colors that form a symbol in said symbol area, M colors that are equal to or smaller than N;
symbol cutting means for performing a symbol cutting process for said symbol area; and
color allocation means for allocating one of said M colors for each symbol cut unit that is obtained by said symbol cutting means.
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Abstract
In an image processing apparatus, color image data is binarized, and a symbol area in the color image data is detected. There are obtained, from N colors that form a symbol in the symbol area, M colors that are equal to or smaller than N in number. A symbol cutting process is performed on the symbol area, and one of the M colors is allocated for each symbol cut unit that is obtained by the symbol cutting.
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Citations
3 Claims
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1. An image processing apparatus comprising:
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binarizing means for binarizing color image data; detection means for detecting a symbol area in said color image data; color reduction means for obtaining, from N colors that form a symbol in said symbol area, M colors that are equal to or smaller than N; symbol cutting means for performing a symbol cutting process for said symbol area; and color allocation means for allocating one of said M colors for each symbol cut unit that is obtained by said symbol cutting means.
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2. An image processing method comprising the steps of:
binarizing color image data;
detecting a symbol area in said color image data;
obtaining, from N colors that form a symbol in said symbol area, M colors that are equal to or smaller than N;
performing a symbol cutting process for said symbol area; and
allocating one of said M colors for each symbol cut unit that is obtained by said symbol cutting.
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3. A computer readable storage medium storing executable commands to perform an image processing method comprising the steps of:
binarizing color image data ;
detecting a symbol area in said color image data;
obtaining, from N colors that form a symbol in said symbol area, M colors that are equal to or smaller than N;
performing a symbol cutting process for said symbol area; and
allocating one of said M colors for each symbol cut unit that is obtained by said symbol cutting.
Specification