A predetermined image correction process is automatically performed on an image, and information for identifying that the predetermined image correction process has been performed is displayed in a state that an image having undergone the predetermined image correction process is being displayed.

A medium transport device includes a transport section transporting a medium in a contact manner, an electrode detecting static electricity charged on the medium, and a static electricity detection circuit. The static electricity detection circuit includes a voltage clamp circuit clamping a detection signal input from the electrode to a predetermined voltage, an amplifier circuit amplifying an output signal of the voltage clamp circuit, a rectifier circuit rectifying an output signal of the amplifier circuit, and a comparator circuit serving as a determination circuit determining whether the medium exists based on an output signal of the rectifier circuit.

A reading device includes a reading unit configured to read a document, and a control unit configured to acquire image data including a document region and a background region from the reading unit. The control unit acquires document information about a document, and sets, based on the document information, a background range indicating a range of a luminance value regarded as the background region.

A conveyance apparatus includes a separation unit configured to separate and convey a sheet, a detection unit configured to detect a floating of the sheet passing through the separation unit, and a control unit configured to stop separate conveyance by the separation unit if the detection unit detects the sheet for not less than a predetermined time and/or a predetermined count.

A reading apparatus that reads an image formed on a document while transporting the document, the reading apparatus includes a first reading section that reads, as a read image, one of specularly reflected light or diffusely reflected light which is reflected from the document on a reading glass through which the moving document passes, and a second reading section that reads, as a read image, the other of the specularly reflected light or the diffusely reflected light which is reflected from the document on one side of a transport path through which the document is transported.

A surface object comprises a surface with a boundary, the surface having a background color. At least one optical marker is provided on the surface for assisting of image processing for improving appearance of an image of the surface with the boundary. At least one optical marker includes at least one color which is lighter or darker than the background color and the color different ΔE between the background color and the at least one color of the optical marker being between ΔE=2 and ΔE=18.

A document feed portion of an image reading device is capable of feeding a document placed on a first document placement portion, to a predetermined reading position. A size detection portion detects a size of the document placed on the first document placement portion. A storage processing portion stores size information indicating the size of the document detected by the size detection portion, into a predetermined storage medium. An image reading portion performs a reading process of scanning a read surface of the document placed on a second document placement portion, to read an image. A setting portion sets the size information stored into the storage medium by the storage processing portion, as size information to be used for the reading process by the image reading portion.

A distance between a reference position and a reference image of a sheet is accurately measured without adding a special device even when an attitude of the sheet is not stable. An aspect of the present invention obtains image data by reading a sheet surface formed with the reference image such as a trim mark by a reading portion. A height calculation portion calculates edge-blur amounts of the reference position and the reference image on the sheet surface from the image data. Furthermore, a height calculation portion detects heights from a focus position to the sheet surface for the reference position and the reference image, from the edge-blur amount and a reflected light amount of a white solid portion. Moreover, a distance detection portion calculates a distance between the reference position and the reference image on the sheet surface, on the basis of a detection result.

Provided is an information processing apparatus that transmits image data input by sequentially reading originals, with limiting an allowable frame size. The apparatus includes: a transmission control unit, in which, in a case where an original has an existing size, the transmission control unit transmits the image data to a destination with frames having one of frame sizes selected based on the existing size of the original, such that transmission of the current image data is finished before a start of transmission of the image data of the next original.

An image reading apparatus includes an image reading device and a control device. The image reading device performs image reading of an original document to generate a read image. The control device includes a processor and functions, through the processor operating in accordance with a control program, as an edge shape detector and a missing part determiner. The edge shape detector uses as a target image the read image or an image obtained by subjecting the read image to predetermined image processing and detects an edge shape of at least one of a leading edge and a trailing edge of a document image corresponding to the original document in the target image. The missing part determiner determines, based on the detected edge shape, whether or not a missing part of the document image has occurred.