Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2006-08-29
2006-08-29
Do, Anh Hong (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C382S260000, C382S266000
Reexamination Certificate
active
07099520
ABSTRACT:
There is provided an image processing apparatus, image processing method, and a program product for image processing capable of reproducing character images against a background region clearly without white framed areas or turbid areas. An MTF corrector21includes a lightness-change controller113. The lightness-change controller113is constituted by two AND circuits114, 115and a lightness-change filter116. In the AND circuit114, there are inputted a character-region against halftone solid-region signal (_BETA_MOJI) and an inversed signal of a character-region-discrimination inner edge signal (_INEDG). On the other hand, in the AND circuit115, there are inputted a character-region against halftone-dot-region signal (_AMI_MOJI) and an inversed signal of a character-region-discrimination inner edge signal (_INEDG). Output signals from the AND circuits114and115are inputted to the lightness-change filter116. In the lightness-change filter116, lightness of a target pixel is changed from its inherent lightness to average lightness of a background region adjoining the target pixel.
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Buchanan & Ingersoll & Rooney PC
Do Anh Hong
Minolta Co. , Ltd.
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