Canon Kabushiki Kaisha

Masatomo Shimizu

Yoshinori Ikeda

Tetsuya Ohnishi

A color image forming apparatus including: a discriminating circuit for discriminating a character portion of an object color image; a color image forming device for forming a color image and able to change the image-forming resolution; and a control circuit for causing change of the resolution of the color image forming device in accordance with the discrimination result provided by the discriminating circuit.

Color image copying with resolution control

A color image processing apparatus is disclosed wherein an edge portion of an achromatic area is detected to emphasize the edge portion and reduce the density of a chromatic area near the edge portion, and the reduced chromatic portion signal is further suppressed, such that the half tone area can be processed at high gradation and the black character and line image can be outputted in more black and with high resolution, resulting in less color bleeding.

Color image processing apparatus

An edge portion of an achromatic area is detected to emphasize the edge portion and reduce the density of a chromatic area near the edge portion, and the reduced chromatic portion signal is further suppressed, such that the half tone area can be processed at high gradation and the black character and line image can be outputted with more black and high resolution, resulting in less color bleeding.

A color image forming apparatus including; a discriminating circuit for discriminating a character portion of an object color image; a color image forming device for forming a color image, and able to change the image forming resolution; and a control circuit for causing change of the resolution of the color image forming device in accordance with the discrimination result provided by the discriminating circuit.

Growing community of inventors

Yokohama, Japan

Masatomo Shimizu