An image revising method, an image forming apparatus, and a method for revising image spreading are provided. The image revising method includes regulating a black color level in a black area of an input image; adjusting a color level of at least one other color excluding the black color in the black area; and revising the image by applying the regulated black color level and the adjusted color level of the at least one other color. Thus, in copying a document, the black color with the enhanced legibility can be serviced.

Claims

16 · 2 independent · depth 3

16 granted claims

›1.independentAn image revising method comprising:nextracting a brightness of the black area of an input image;regulating a black color level in a black area of the…+7

›2.↳ 1The image revising method of claim 1, wherein a black color level exceeding the reference black color level is regulated to not exceed the reference b…d2+1

›4.↳ 1The image revising method of claim 1, wherein the adjusting of the color level comprises lowering the color level of each color at a preset removal ra…d2

›5.↳ 1The image revising method of claim 1, further comprising:noutputting the revised image;inputting an adjustment of the at least one other color excludi…d2+2

›8.↳ 1The image revising method of claim 1, wherein the black color level is compensated based on the following equation:nCdiff=C0âˆ’Cnew Mdiff=M0âˆ’Mnew Yd…d2

›9.independentAn image forming apparatus comprising:na brightness extractor to extract a brightness of the black area of an input image;a black regulator to regulat…+7

›10.↳ 9The image forming apparatus of claim 9, wherein the black regulator regulates a black color level exceeding the reference black color level so as to n…d2+1

›12.↳ 9The image forming apparatus of claim 9, wherein the color regulator lowers the other color levels of each other color at a preset removal ratio in a s…d2

›13.↳ 9The image forming apparatus of claim 9, further comprising:na printer part to output the revised image; anda user interface to input an adjustment of …d2+2

›16.↳ 9The image forming apparatus of claim 9, wherein the black regulator compensates the black color level based on the following equation:nCdiff=C0âˆ’Cnew…d2

Classifications

3 codes

IPC · International Patent Classification

Section H — Electricity

H04N1/60

USPC · US Patent Classification

358/1.9358/2.1

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4.5 y

1,628 days filing → grant

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Marivelisse Santiago Cordero

art unit 2676 · TC 2600

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›Priority documents — 1

Type	Document	Date
related publication	US 20100033737 A1	11 Feb 2010

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