Ricoh Company, Ltd.

Kazuhiko Nakaya

Kazuhiro Ando

Yukio Noguchi

Shigefumi Soga

Fumihiro Kitahara

Youji Mouri

Hisatsugu Niki

Koichi Ichihara

An image reading method and apparatus. A reader is mounted and reads one side of an original document being conveyed at a reading position. A contact glass includes a surface contacting the original document. A reference is disposed at a side of the contact glass opposite to the surface and movable between the reading position and a standby position. The reference includes a surface facing the reader which has a predetermined color for providing shading data used for a shading correction. A carrier moves the reference to the reading position. The reader obtains the shading data by reading the predetermined color on the surface of the reference at the reading position.

Method and apparatus for image reading capable of obtaining adequate white reference data for shading correction

An image reading apparatus includes a line sensor for reading an image of an original, a scanning optical system that has a light source and scans the original, a reference reflection member provided in such a position as to reflect a light emitted from the light source, a buffer memory for storing data of the image, an intermittent reading part interrupting and restarting scanning performed by the scanning optical system based on a residual storage capacity of the buffer memory, and a light amount variation correction part correcting a variation in an amount of light of the light source during an interruption of the scanning based on an amount of reflected light from the reference reflection member.

Image reading apparatus and copier

Growing community of inventors

Nagoya, Japan

Kazuhiko Nakaya