An image reading device includes: a housing, a document loading surface, a reading unit, a first through hole, a second through hole, an insertion member, and a first member. The first through hole is provided in a manner such as to be pierced through the housing. The second through hole is provided oppositely to the first through hole in a manner such as to be pierced through the reading unit located at a predefined place. When being inserted in the first through hole and the second through hole, the insertion member stops movement of the reading unit in a horizontal direction and fixes the reading unit in the housing. The first member closes the first through hole and has a shape deforming in accordance with the insertion of the insertion member in the first through hole and the second through hole.

An image reading device includes: a housing, a document loading surface, a reading unit, a first through hole, a second through hole, an insertion member, and a first member. The first through hole is provided in a manner such as to be pierced through the housing. The second through hole is provided oppositely to the first through hole in a manner such as to be pierced through the reading unit located at a predefined place. When being inserted in the first through hole and the second through hole, the insertion member stops movement of the reading unit in a horizontal direction and fixes the reading unit in the housing. The first member closes the first through hole and has a shape deforming in accordance with the insertion of the insertion member in the first through hole and the second through hole.

A reading method guidance apparatus includes a receiving unit, an acquisition unit, and a guidance unit. The receiving unit receives a document size that is a size of a document as a reading target. The acquisition unit acquires an image of at least a partial area in the document. The guidance unit provides an operator with guidance about a reading procedure when the document is read by a first reading apparatus in plural batches, using a feature amount obtained from the acquired image, the received document size, and a readable size that is a size of an area readable by the first reading apparatus.

A document size detecting apparatus includes a first acquisition unit, a second acquisition unit, and a detector. The first acquisition unit acquires a first image that is an image of an entire document as a reading target. The second acquisition unit acquires a second image that is an image of a part of the document read by a first reading apparatus. The detector detects a size of the document using a result of a matching process between the first image and the second image and a read size that is a size of the second image read by the first reading apparatus.

An image forming apparatus comprises a printer for forming an image on a sheet, an image scanner for reading a measurement image formed on a sheet, and a controller. The printer forms the measurement image at four corners of the sheet. The image scanner reads the sheet on which the measurement image is formed by dividing into two parts. The controller generates an entire read image of the sheet from the read image of the measurement image which is read by the image scanner by dividing into two parts. The controller generates an adjustment condition to adjust a position of an image formed by the printer based on the entire read image of the sheet. The controller causes the printer to form the image based on the adjustment condition.

An image processing apparatus obtains image data of a document image and extracts a plurality of feature points of the document image. The image processing apparatus obtains a skew angle of the document image with respect to a predetermined direction and an assembling angle of an image obtaining unit with respect to a predetermined assembling direction from a coordinate correspondence relationship between coordinates of a plurality of feature points of a registered document image registered in advance and coordinates of the plurality of extracted feature points of the document image.

An image sensor reads an image from a document sheet at a reading position. Two document sheet sensors are capable of detecting the document sheet at two positions along boundaries of a reference pass-through area of the document sheet at a detection position more on an upstream side of a conveying direction than the reading position. Two sets of independent roller pairs are arranged with an interval provided therebetween in a width direction at positions between the detection position and the reading position, and rotation speeds thereof can be changed independently. A control portion changes, when the document sheet is detected by one of the two document sheet sensors, a speed ratio of the two sets of independent roller pairs from a reference ratio to a correction ratio during an adjustment period that lasts until the document sheet is no longer detected by both of the two document sheet sensors.

An image reading apparatus including a reading unit comprising a photodetector configured to read an image information on a sheet, and a projecting portion, a case storing the photodetector therein, the case comprising a transparent portion configured to transmit light to be received by the photodetector, and a portion defining an opening through which the projecting portion is projected outward from the case, and an elastic portion provided to fill a space where the projecting portion is not present in the opening. The case movably stores the photodetector within a range where the projecting portion is movable in the opening.

A system and method for efficiently importing scanned construction project documents (e.g., digital images of physical documents) is disclosed. The method includes receiving a digital image of a document and performing a first text recognition operation on a first portion of the digital image. The method includes in response to determining, based on the first text recognition operation, that the first portion does not include machine-readable text, generating a modified image of the document by performing an image modification operation. The image modification operation may include an orientation operation. The method further includes storing the modified image of the document in a database. The image modification operation may also include a de-skewing operation and an alignment operation.

A printer includes a table, a print head, a detector, and a controller. The controller includes a storage to store initial print data including information of reference position marks, a reader to acquire, using the detector, positional information of position detection marks, a print data generator to modify the initial print data such that the reference position marks each coincide with an associated one of the position detection marks acquired by the reader, thus generating actual print data; and a printing controller to perform printing in accordance with the actual print data.