Image quality correction apparatus and image quality...

Details Image quality correction apparatus and image quality... Image quality correction apparatus and image quality...

2004-09-09

2009-12-22

Bella, Matthew C. (Department: 2624)

Image analysis

Color image processing

Color correction

C382S168000, C382S274000

Reexamination Certificate

active

07636472

ABSTRACT:
A count judgment unit judges whether or not a luminous value and color-difference values calculated by a luminous color-difference calculation unit are those of a pixel as a component of a character area, and outputs only luminous values of pixels other than pixels as components of the character area, to a luminous histogram formation unit. Then, a correction amount calculation unit and an image quality correction unit perform correction of image quality of input image data on the basis of the luminous histogram that is formed by the luminous histogram formation unit using the luminous values outputted from the count judgment unit. Therefore, even when information that adversely affects image quality correction, such as characters, is mixed in the input image, appropriate correction can be performed on only the image area to be corrected.

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