Image processing method

Details Image processing method Image processing method

2006-12-05

2006-12-05

Moore, David (Department: 2626)

Facsimile and static presentation processing

Natural color facsimile

Color correction

C358S001900, C358S003030, C358S003050, C358S003020, C358S003060, C358S003120, C358S534000, C358S536000, C358S535000, C382S237000, C382S252000, C382S274000

Reexamination Certificate

active

07145702

ABSTRACT:
An image data of M-gradations in a pixel is converted into multivalued image data of N-gradations (M>N>2) in a pixel. A remarked pixel converted into the multivalued data is determined whether to be a predetermined gradation TJ (N>TJ>2) in which a tone jump occurs. When the remarked pixel converted into the multivalued data is determined to be the predetermined gradation TJ, it is determined whether a pixel of the predetermined gradation TJ exists in pixels being adjacent to the remarked pixel. When the pixel of the predetermined gradation exists, the gradation of the remarked pixel is changed to the gradation other than the predetermined gradation so as to prevent the tone jump, and an average density after multivalued image data conversion is preserved.

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