A laser scanning device includes light source, deflection portion, image forming lens, a block position setting portion, and a light source control portion. The image forming lens condenses a light beam deflected by the deflection portion on a scanned surface, and causes the light beam to be scanned on the scanned surface in a scanning direction at an equal speed. The block position setting portion sets one or more block areas which each include a plurality of section areas sectioned from each other on the scanned surface in the scanning direction. The light source control portion controls the light source to irradiate the light beam to the plurality of section areas at a plurality of irradiation timings that are determined for each of the block areas. The block position setting portion shifts set positions of the block areas along the scanning direction for each scan of at least one line.

In accordance with an embodiment, a first light source configured to emit visible light; a second light source configured to emit invisible light; and a light guide section configured to reflect the light emitted by the first light source and the second light source in a longitudinal direction towards a direction of a reading area of an image.

A scanning device includes a casing holding a original document table. A facing area is provided to the casing, and a rectangular hole is formed on the facing area. The rectangular hole has edges extending along a main scanning direction and edges extending along a sub-scanning direction. The edges extending along the sub-scanning direction are located in a central area of a photoelectric conversion element row of a sensor assembly in the main scanning direction. The sensor assembly scans the rectangular hole and detects a edge extending along the main scanning direction and a edge extending along the sub-scanning direction, thereby determines a scanning start position.

In accordance with an embodiment, a first light source configured to emit visible light; a second light source configured to emit invisible light; and a light guide section configured to reflect the light emitted by the first light source and the second light source in a longitudinal direction towards a direction of a reading area of an image.

A lens-mirror array includes a second optical element arranged adjacent to a first optical element in a main-scan direction. The first optical element has an incident surface, a first reflection surface, and an exit surface. The incident surface is shaped to transmit and focus a light incident on the incident surface. The first reflection surface has positive optical power and is configured to reflect and focus the light entering through the incident surface. The exit surface outputs the light reflected by the first reflection surface. The second optical element includes a second reflection surface. A travel blocking portion is provided between the first reflection surface and the second reflection surface. A reflectance reduction layer is provided in the travel blocking portion to set light reflectance in the travel blocking portion to be lower than that of the first reflection surface.

An image reading apparatus includes a gray reference member, a reading unit, an adjusting unit, a calibration unit, a storage unit, and a control unit. The control unit is configured to execute a first preprocessing and a second preprocessing. The first preprocessing includes: acquiring first black data from one line worth of image data; acquiring white data; calculating white-black difference data; acquiring first light gray data; and calculating first light gray-black difference data. The second processing includes: acquiring second black data from the one line worth of the image data; acquiring second light gray data; calculating second light gray-black difference data; calculating a change ratio by dividing the second light gray-black difference data by the first light gray-black difference data; and calculating calibration data by multiplying the white-black difference data by the change ratio. Shading of the image data is calibrated in response to the calibration data.

A reading device includes a platen; a cover; a reading unit; and a controller. The platen includes first and second reference points. The controller is configured to: control the reading unit to read one line worth of data in a main scanning direction when the cover is moved from an open position to a close position with an original document being placed on the platen, the one line including the first and second reference points; determine whether the first reference point is overlaid with the original document; in response to determining that the first reference point is overlaid with the original document, determine a first length of the original document in the main scanning direction based on the one line worth of data; specify a particular size of the original document such that the first length is a short side length of a prefixed sheet in the particular size.

Example implementations relate to streak compensation. Some examples may calibrate an initial gain for data from an optical element based on a scan of a first calibration target, obtain an image of a second calibration target from the optical element using the calibrated initial gain, and detect at least one streak in the image of the second calibration target. Some examples may also record data representing the at least one detected streak and may calibrate a final gain for the optical element based on the initial gain and the data representing the at least one detected streak.

A laser scanning device includes light source, deflection portion, image forming lens, a block position setting portion, and a light source control portion. The image forming lens condenses a light beam deflected by the deflection portion on a scanned surface, and causes the light beam to be scanned on the scanned surface in a scanning direction at an equal speed. The block position setting portion sets one or more block areas which each include a plurality of section areas sectioned from each other on the scanned surface in the scanning direction. The light source control portion controls the light source to irradiate the light beam to the plurality of section areas at a plurality of irradiation timings that are determined for each of the block areas. The block position setting portion shifts set positions of the block areas along the scanning direction for each scan of at least one line.

Embodiments of the present invention relate to a machine, a method and a computer program product for partial information capture and processing. A touch input that draws a pattern can be detected on a lid of a machine, where the lid is touch-sensitive and is operable to cover an object to be processed. Specifically, the lid allows a user to see at least a part of the object. In response to detecting the touch input on the lid, a part of the object is identified based on the pattern. Then the machine generates a processing result that only contains the identified part of the object.