Image reading apparatus

Details Image reading apparatus Image reading apparatus

2007-07-23

2010-06-08

Nguyen, Madeleine A (Department: 2625)

Facsimile and static presentation processing

Natural color facsimile

Color correction

C358S505000, C358S474000, C355S082000, C399S362000

Reexamination Certificate

active

07733548

ABSTRACT:
A method is provided for processing image data read from a book document placed on a platen of an image reading apparatus. The method includes determining a background pixel of the image data based on a luminance difference or a color difference between neighboring pixel arrays, identifying a shadow region based on a luminance change between the neighboring background pixel arrays, discriminatively detecting a shadow of a binding portion and a shadow of a front edge in a document region with reference to a changing direction of shadow luminance, and performing a luminance correction on the shadow region according to characteristics of the shadows.

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