Fuji Xerox Co., Ltd.

Akihiko Tanaka

Izumi Takashima

Mitsugu Kamio

Kazuaki Shintani

Yosuke Takebe

Mitsuo Ohtaki

Shinichi Gono

Mayumi Tada

The present invention provides an image reading apparatus that includes: a photoelectric sensor including plural reading pixels aligned in one direction and output an electric signal depending on the amount of light from an image on the document; a read control section that reads a document image with the photoelectric sensor in accordance with a read instruction, and obtains image data; a black correction section that performs a black correction to adjust an output under dark condition of each reading pixel to a value within a predetermined range, the output under dark condition being an electric signal output when the amount of light input is zero; and a black correction execution determining section that determines whether to perform the black correction, when the read interval between each two document sheets of the multi-page document is equal to or shorter than a predetermined period of time.

Image reading apparatus, black correction executing method, and a computer-readable medium storing black correction executing program

A self-diagnostic system for image reading equipment having an imaging unit and at least one circuit board, including a pattern generator, which generates a prescribed pattern signal, disposed at the input end and/or the output end of the circuit board. According to this system, a source of problems occurring in the image reading equipment can be identified, that is, a faulty component can be identified by performing a copying operation for a pattern generated by the pattern generator.

Self-diagnostic system for image reading equipment

Growing community of inventors

Kanagawa, Japan

Akihiko Tanaka