The present disclosure relates to a portable scanner capable of increasing the precision of focus and a scanning method using the same. According to an embodiment of the present disclosure, the portable scanner, which generates a three dimensional (3D) image from a subject, includes a focus state output device to determine a present focus state with respect to a set focal length from a subject and to output the present focus state such that a user recognizes the present focus state.

The present disclosure relates to a portable scanner capable of increasing the precision of focus and a scanning method using the same. According to an embodiment of the present disclosure, the portable scanner, which generates a three dimensional (3D) image from a subject, includes a focus state output device to determine a present focus state with respect to a set focal length from a subject and to output the present focus state such that a user recognizes the present focus state.

A light homogenization method for multi-source large-scale surface exposure 3D printing, comprising the following steps: projecting pure-color images of a first color and a second color having identical attributes capturing an image of an overlapping portion and calculating height and width information of the overlapping portion; splitting a pre-processed slice and respectively recording width and height information of two slices resulting from the splitting and generating two grayscale images having identical attributes thereto; counting power values of identical positions of slices in different grayscale values, performing a further calculation to obtain a projection mapping function, using the projection mapping function as a basis for performing optimization on grayscale interpolation of the generated images; and fusing the processed grayscale images and the originally split two slices to obtain a surface exposure 3D printing slice having a uniform brightness in final shaping.

A document camera which operates with electric power supplied via a USB cable includes: an image pickup unit which picks up an image of a subject via a lens; a light source unit which emits light toward the subject; a drive unit which drives the lens; a detection unit which detects an amount of current supplied via the USB cable; and a control unit which controls an operation of the light source unit and the drive unit according to the amount of current detected by the detection unit.

An image reading device includes reading devices arranged in a main scanning direction perpendicular to a sub-scanning direction, position reference members each including a reference pattern for correcting relative positions of pixels in each of the reading devices or relative positions of the reading devices, and circuitry. The reference members move in the sub-scanning direction relative to the reading devices, and include first reference members for correcting the relative positions of the reading devices and second reference members for correcting the relative positions of the pixels in each of the reading devices. While switching between the first reference members and the second reference members, the circuitry calculates a correction value for a deviation of the pixels in each of the reading devices and a correction value for a deviation of the reading devices based on a result of reading of the reference members.

An image reading apparatus includes a substrate, a light guiding member, an image reading portion, and a supporting member. The light guiding member has a first contact surface and a second contact surface. The supporting member has a third contact surface supporting the first contact surface and a fourth contact surface supporting the second contact surface. In a cross section crossing the longitudinal direction, at least one of the first contact surface of the light guiding member and the third contact surface of the supporting member is a curved surface. In the cross section crossing the longitudinal direction, at least one of the second contact surface of the light guiding member and the fourth contact surface of the supporting member is a curved surface.

Embodiments of the preset invention include a barcode reader that comprises a housing having a handgrip portion and an upper body portion, a first printed circuit board (PCB) extending into the upper body portion, and an imaging module positioned within the upper body portion. In this instance, the imaging module includes an imaging system having an imager and an imaging lens assembly, the imaging system having a field of view with a central imaging axis passing through a window in the upper body portion and lying on a horizontal plane. The imaging module further includes an aiming light system configured to emit an aiming light pattern, the aiming light system offset from the imaging system along the horizontal plane. Furthermore, the components of the barcode reader are arranged such that the first PCB is positioned at an oblique angle relative to the central imaging axis.

Embodiments of the preset invention include a barcode reader that comprises a housing having a handgrip portion and an upper body portion, a first printed circuit board (PCB) extending into the upper body portion, and an imaging module positioned within the upper body portion. In this instance, the imaging module includes an imaging system having an imager and an imaging lens assembly, the imaging system having a field of view with a central imaging axis passing through a window in the upper body portion and lying on a horizontal plane. The imaging module further includes an aiming light system configured to emit an aiming light pattern, the aiming light system offset from the imaging system along the horizontal plane. Furthermore, the components of the barcode reader are arranged such that the first PCB is positioned at an oblique angle relative to the central imaging axis.

An information reading device capable of optically and appropriately reading information recorded on one surface of a first information recording medium having an end portion in which folds and the like are liable to occur, and information recorded on both surfaces of a second information recording medium which has an end portion in which folds and the like are not liable to occur.

An information reading device capable of optically and appropriately reading information recorded on one surface of a first information recording medium having an end portion in which folds and the like are liable to occur, and information recorded on both surfaces of a second information recording medium which has an end portion in which folds and the like are not liable to occur.