Ricoh Company, Ltd.

Tamotsu Kajihara

Osamu Uchinokura

Kumi Hasegawa

Satoru Miyamoto

Noboru Kuroda

Yoshihiro Suguro

Shohichi Sugimoto

Hideyuki Ueda

An apparatus for performing image processing on image data including a memory color includes: a characteristic value calculation part calculating a characteristic value from the image data; an area extraction part extracting a specific color area and its background area from the image data, using the characteristic value and the color information of the memory color stored in a storage part; a target value calculation part calculating a target value for correcting the preferable color of the specific color from the characteristic value, the extracted specific color and background areas, and the color information of the preferable color; and an image data correction part calculating a correction for correcting the preferable color based on the calculated target value and the characteristic value, and correcting a color of the specific color area based on the calculated correction and the characteristic value.

Image processing apparatus and method

A toner including toner particles including at least a binder resin having a first melting point and a first solubility parameter, a colorant and a particulate release agent having a second melting point lower than the first melting point and a second solubility parameter different from the first solubility parameter, wherein the particulate release agent dispersed in the toner particles has an average needle-shape degree LD/SD of not less than 1.6, where LD is a diameter of a particle of the release agent dispersed in the toner in a major axis direction thereof and SD is a diameter of the particle in a minor axis direction.

Electrophotographic toner and image forming method using the toner

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Kanagawa, Japan

Tamotsu Kajihara