Abstract:
An optical scanner equipped with plug-in calibration film, which the optical scanner provides light incident upon a transmission-typed document and catches the image signals of the transmission-typed document by an optical chassis. The optical scanner equipped with plug-in calibration film includes a scanning zone and at least one attachment. The scanning zone is capable of providing for placing the transmission-typed document. The attachment is capable of providing a calibration film for enabling the optical chassis to retrieve the image signals so as to improve the image brightness.
Abstract:
A scanner includes a transparent scanning window; a housing, the housing including a first side supporting the scanning window and a second side opposite the first side; a scanning array movable in the housing relative to the scanning window along a scanning path, the scanning array generally facing the first side; a light source movable with the scanning array, the light source generally facing the first side; and a calibration target supported by the housing within the scanning path, the calibration target generally facing the second side. A method of manufacturing a scanner includes providing a scanner including a transparent scanning window; a housing, the housing including a first side supporting the scanning window and a second side opposite the first side; a scanning array movable in the housing relative to the scanning window along a path, the scanning array facing the first side; and a light source movable with the scanning array and facing the first side; and supporting a calibration target from the housing, within the scanning path, the calibration target facing the second side.
Abstract:
A compact structure and rapid method for calibrating a document scanner provides for a substantially cylindrical calibration casing having a central axis and an outer surface, with a brightness calibration section of the outer surface encompassing a portion of the circumference of the outer surface, a document width detection segment encompassing a second portion of the circumference of the outer surface, and a document backer element encompassing a third segment of the circumference of the outer surface of the casing. A driver selectively positions the casing in different rotational positions in which the different segments of the outer surface of the cylinder face the optical element of the scanner.
Abstract:
An image processing apparatus, method and computer program product, wherein an initializing process of a scanner is performed in a short period of time when a return operation from a shutdown state is performed. A carriage of the scanner stays in a white level range when the main body is put in the shutdown state. Thus, the scanner immediately makes an automatic adjustment to its image reading level when the return operation from the shutdown state is started. The carriage detects an original position for a scanning operation while it moves to a standby position after the automatic adjustment is made. Thereby, the initializing process of the scanner is performed eliminating an operation of the carriage in which the carriage moves to the white plate range to read the white plate.
Abstract:
An image scanner having an improved scanning quality is disclosed. Two different color blocks having an interface therebetween are provided on the document platform of the image scanner. The image pickup device passes by the color blocks prior to the document area so that color calibrations and/or error detection can be performed before the scanning operation is performed. By this way, the color data such as the brightness of the obtained image can be compensated, and the deflection rate and/or the amplification error of the image pickup device can be corrected.
Abstract:
The present invention provides a resolution adjustment method for adjusting the resolution of a scanning module. The scanning module is installed in a scanner for scanning a document and comprises a case with a line-shaped opening on its top for receiving light from the document, a sensor installed in the case and comprising linearly arranged sensing units for scanning the light from the document and generating correspondent image signals, a lens installed in the case for converging the light from the document to the sensor, and a mirror module installed in the case for passing the light from the document through the lens to the sensor. The resolution adjustment method provides the scanning module with a calibration picture for generating a calibration image which comprises two groups of parallel lines in two directions for calibrating the resolutions of the sensor in the two different directions. Then, the magnitude of the image is measured corresponding to the two groups of parallel lines and the position of the scanning module is adjusted until the resolutions represented by the image signals corresponding to the two groups of parallel lines are roughly equal.
Abstract:
An object of this invention is to provide an original carrier and an image reader capable of performing a focusing operation every original carrier.To achieve this object, a slit hole 32 extending in a direction perpendicular to a film conveying direction is formed in a width enlarging portion of a film conveying path 34. Focusing charts 58 are formed on faces of a glass plate 38 fitted into the slit hole 32 on sides of the film conveying path 34 in both end portions of the glass plate 38 in its longitudinal direction. When light from a light source is transmitted through the focusing charts 58 of the glass plate 38 and is incident to a line CCD, focusing control is performed by a microprocessor so as to maximize the contrast of an image of each of the focusing charts 58. The focusing control can be also performed so as to maximize the contrast of an image of a photographic film 22.
Abstract:
A paper feed roller (5) is divided into a first roller (5a) and a second roller (5b); a slit (58) through which about 10 to 20 sheets of documents can pass is formed between the first roller and a gate plate (57) opposite to this; and the paper fed out therefrom is fed out to a space between the second roller (5b) and a separation pad (7) in contact with this.Also, there is adopted a construction in which the pressing force of a paper conveyance spring is transformed by a slide cam sliding in a direction parallel to the paper feed roller; and the paper width detection sensor is assembled by a fitting construction.
Abstract:
In an input scanner provided with a document input, a sheet feeding path for transporting documents to a scanning station and to a document output; a scanning station having at least a first scanning element, normally fixed in position relative to the sheet feeding path, and supporting a full width array of photosensitive sensors with a coresponding optical arrangement for directing light from the document to the sensors, there is provided an arrangement for bringing the optical arrangement and sensors of the scanning element to a calibration sensing position for detection of a calibration target provided in a fixed position within the input scanner, while retaining the scanning element at a fixed position relative to the sheet feeding path. The arrangement for moving the optical arrangement and sensors of the scanning element to a calibration sensing position for detection of a calibration target may also provide movement to a service position to allow access to the sensors from a position exterior to the input scanner without disassembly of the scanning head from the input scanner.
Abstract:
A reading device includes a position reference member and a reader. The position reference member has a reference pattern that includes a line extending in a prescribed direction. The position reference member is configured to relatively move in a direction orthogonal to the prescribed direction. The reader includes a plurality of sensor chips, each of the sensor chips including a plurality of pixels. The reference pattern corresponds to each of the sensor chips of the reader.