Abstract: An image reading apparatus including a first image unit fixed on one side of a conveyance path, a second image unit provided on the other side of the conveyance path and facing the first image unit, a guide at the second image unit and that contacts a medium to move the second image unit in a direction away from the conveyance path, an image sensor at one of the first image unit and the second image unit, a reference plate at the other one of the first image unit and the second image unit, and a thickness detection unit for detecting a thickness of the medium on the basis of an image signal output by the image sensor that captures an image of the reference plate with the medium inserted between the first image unit and the second image unit.

Abstract: An image-reading apparatus, includes a variation acquiring unit that acquires a variation of a distance or an angle between a medium to be read and an imaging unit or a light source, and a color shift correcting unit that calculates a color shift between the medium and the imaging unit or the light source based on the variation acquired by the variation acquiring unit and corrects the color shift.

Abstract: An image-reading system that includes a plurality of image-reading apparatuses each including a document reading start instructing unit, and an information processing terminal connected to the image-reading apparatuses, wherein each of the image-reading apparatuses includes a detecting unit that detects that a user operates the document reading start instructing unit, a reading unit that reads a document when the detecting unit detects the operation of the user, and an image file transmitting unit that transmits an image file of the document read by the reading unit to the information processing terminal.

Abstract: An image reading apparatus comprising a first unit fixed on one side of a conveyance path, a second unit provided on the other side of the conveyance path and facing the first unit, a guide that is provided at the second unit and that contacts the medium to move the second unit in a direction of separating from the conveyance path, an imaging unit provided at one of the first unit and the second unit, a reference plate provided at the other of the first unit and the second unit, and a thickness detection unit for detecting a thickness of the medium on the basis of an image signal output by the imaging unit that captures an image of the reference plate with the medium inserted between the first unit and the second unit.

Abstract: A medium conveyance apparatus including a first unit on one side of a conveyance path of a sheet-shaped medium, a second unit on the other side of the conveyance path and facing the first unit, a guide unit that is provided at the second unit and that contacts the medium between the first and second unit to move the second unit in a direction of separating from the conveyance path, an imaging unit provided at one of the first and second unit, a reference plate whose image can be captured by the imaging unit and that is provided at the other of the first and second unit, and a detecting unit for detecting the medium in the conveyance path, the detecting unit being provided in the conveyance path at an upstream position of a reading position where the imaging unit reads the medium.

Abstract: An apparatus includes: a light source opposite to one surface of a medium; a backing member opposite to another surface of the medium and including a backing surface opposite to the another surface of the medium; an imaging unit opposite to the one surface of the medium and at a position different from the light source in a conveyance direction, and to pick up an image of the medium and the backing surface on which a shadow of the medium is formed due to light from the light source; and a processor to generate image data including the image of the medium and the backing surface based on a result by the imaging unit, wherein the backing surface is inclined with respect to the conveyance direction, and a gap between the path and the backing surface decreases from a light source side toward an imaging unit side.

Abstract: An image-reading apparatus, includes a variation acquiring unit that acquires a variation of a distance or an angle between a medium to be read and an imaging unit or a light source, and a color shift correcting unit that calculates a color shift between the medium and the imaging unit or the light source based on the variation acquired by the variation acquiring unit and corrects the color shift.

Abstract: An image-reading system that includes a plurality of image-reading apparatuses each including a document reading start instructing unit, and an information processing terminal connected to the image-reading apparatuses, wherein each of the image-reading apparatuses includes a detecting unit that detects that a user operates the document reading start instructing unit, a reading unit that reads a document when the detecting unit detects the operation of the user, and an image file transmitting unit that transmits an image file of the document read by the reading unit to the information processing terminal.

Abstract: An apparatus includes: a light source opposite to one surface of a medium; a backing member opposite to another surface of the medium and including a backing surface opposite to the another surface of the medium; an imaging unit opposite to the one surface of the medium and at a position different from the light source in a conveyance direction, and to pick up an image of the medium and the backing surface on which a shadow of the medium is formed due to light from the light source; and a processor to generate image data including the image of the medium and the backing surface based on a result by the imaging unit, wherein the backing surface is inclined with respect to the conveyance direction, and a gap between the path and the backing surface decreases from a light source side toward an imaging unit side.