An automatic document feeder, which is included in an image reading device and an image forming apparatus, includes first and second document trays, a document output tray, a document conveying passage, multiple document conveying bodies, a drive source, a detector, and a controller. The multiple document conveying bodies include a document holding and conveying body to convey and hold the original document sheet on the second document tray. On detection of the original document sheet on the second document tray while conveying a different original document sheet from the first document tray, the controller stops feeding the different original document sheet, causes the different original document sheet downstream from the document holding and conveying body in a document conveying direction to be conveyed to the document output tray, and stops the drive source after the different original document has been conveyed to the document output tray.

A scanner is disclosed. The scanner has a background pattern that is captured as part of the scanned image. The scanner may be a flatbed scanner, a sheet-feed scanner, or a flatbed scanner using an automatic document feeder (ADF).

Provided is a scanner having sixteen or fewer sensor chips capable of scanning an A4 document; an optical unit that reduces and focuses an image of an A4 document on the sensor chips; and a generator that synthesizes images of the A4 document read by the sensor chips, and generates image data.

Provided is a scanner having: multiple sensor chips; an optical unit that focuses an image of an A4 document on eighteen or more sensor chips; and a generator that synthesizes images of the A4 document read by the sensor chips, and generates image data.

An image reading device includes a loading section, a reader, and a document feeder. The loading section receives loading of a document and an identification medium. The reader reads the document and the identification medium. The document feeder conveys the document to the reader. The loading section includes a second contact glass and a medium restriction section. The second contact glass receives loading of the identification medium. The medium restriction section restricts a position of the identification medium loaded on the second contact glass. The document being conveyed by the document feeder has opposite end portions and a central portion therebetween. The opposite end portions respectively include opposite ends of the document in a direction perpendicular to a conveyance direction of the document. Only the central portion, among the opposite end portions and the central portion, of the document comes in contact with the medium restriction section.

An image reading device includes a reading member and a skew detector. The reading member reads an image of a passing document at a read position preset in a document transport path. The skew detector detects a skew of the document by selecting one of a first skew detection mode and a second skew detection mode based on information that specifies a method for detecting the skew of the document. The first skew detection mode is a mode in which the skew of the document relative to a transport direction is detected based on an image of a leading-edge section, in the transport direction, read by the reading member. The second skew detection mode is a mode in which the skew of the document relative to the transport direction is detected based on an entire image read by the reading member.

Methods and devices process an electronic image of an item that has a background color and line features of a second color distinct from the background color. An electronic image and a menu option are displayed to allow the user to define at least one area of the electronic image as a distinctive color region. The electronic image is separated into different planes, and line features within the distinctive color region are removed from a second mask plane (second color) and added to a third mask plane (third color). The first plane, second mask plane, and third mask plane, are combined into an electronic file, and automatically stored.

Methods and devices process an electronic image of an item that has a background color and line features of a second color distinct from the background color. An electronic image and a menu option are displayed to allow the user to define at least one area of the electronic image as a distinctive color region. The electronic image is separated into different planes, and line features within the distinctive color region are removed from a second mask plane (second color) and added to a third mask plane (third color). The first plane, second mask plane, and third mask plane, are combined into an electronic file, and automatically stored.

A method, and document scanner system, for correcting image values recorded by an optical document scanner with multiple color cameras arranged in a staggered configuration with overlap scan areas includes storing color correction values mapped to respective color index values, where a color correction value is computed from a color difference between a first color value and a second color value of the respective overlap sets, and correcting a third color value which is a color value from the second set of color image values by a color correction value which is looked up via a color index value determined from the third color value. Thereby color variations among staggered cameras are corrected.

Illustration image data drawn correspondingly to reading of an adjustment chart are memorized in a memory section, an adjustment chart is formed in a image mode in an image forming section, adjustment image data produced by reading the adjustment chart in an image reading section are analyzed, illustration image data corresponding to an analysis result of the adjustment image data are selected at the time of adjusting the image forming section based on the analysis result, and display data of the illustration image data are produced.