An image reading device includes a single light source that irradiates an image reading target with light, a traveling change member that changes a traveling direction of the light from the light source and irradiates the image reading target with the light at an incidence angle different from an incidence angle of the light directly applied from the light source to the image reading target, and a switching mechanism that switches traveling of the light from the light source to an optical path for directly irradiating the image reading target or an optical path for irradiating the image reading target via the traveling change member.

An image forming apparatus (100) includes a photoelectric conversion portion (24) that receives light reflected by a document sheet and outputs an electric signal based on the light, a posture adjustment portion (400) having an operation shaft (34) rotatable about a first axis (AX1) and that adjusts a posture of the photoelectric conversion portion (24) according to rotation of the operation shaft (34), and a stimulus output portion (402) that outputs a stimulus perceivable by an operator of the operation shaft (34) each time the operation shaft (34) is rotated by a predetermined specific angle.

An optical module positioning method for an image processing device is provided. The image processing device includes a scanning platform and an optical module. The scanning platform includes a first region, a second region, a third region and a fourth region. The fourth region is arranged between the first region and the second region. The first region is arranged between the third region and the fourth region. The optical module positioning method includes the following steps. Firstly, the optical module is driven to perform a scanning operation to acquire a scanned image while the optical module is not moved. Then, by judging the color values of two ends of the scanned image, the region where the optical module is stayed can be recognized according to the associated color values.

A scanner includes a paper feeding roller set, a paper exporting roller set, a scanning module, a background and calibration roller, a main driving assembly, a first sleeve, a torque limiter and a stop-driving assembly. The paper feeding roller set and the paper exporting roller set are driven by the main driving assembly. The background and calibration roller includes a black background section, a white background section and at least one calibration section. The first sleeve sleeves the first end and is linked to the main driving assembly. The torque limiter is disposed between the background and calibration roller and the first sleeve and contacts the same. The stop-driving assembly is selectively abutted against two portions of the background and calibration roller.

A scanner includes a paper feeding roller set, a paper exporting roller set, a scanning module, a background and calibration roller, a main driving assembly, a first sleeve, a torque limiter and a stop-driving assembly. The paper feeding roller set and the paper exporting roller set are driven by the main driving assembly. The background and calibration roller includes a black background section, a white background section and at least one calibration section. The first sleeve sleeves the first end and is linked to the main driving assembly. The torque limiter is disposed between the background and calibration roller and the first sleeve and contacts the same. The stop-driving assembly is selectively abutted against two portions of the background and calibration roller.

An image capture unit and computer readable medium used in combination therewith. The image capture unit includes an image capturing sensor, a visual display, an instance of the computer readable medium, and circuitry for integrating functionalities thereof. The computer readable medium causes sensor data received from the image capturing sensor to be processed. The sensor data includes a plurality of image tiles and position indicating data defining a respective relative position of each one of each image tiles. Each one of each image tiles includes data representing a discrete portion of visual content. The computer readable medium causes a feedback image be displayed on the visual display. Displaying the feedback image includes correlate the relative position of each one of each image tiles with at least one other image tile that has been previously generated and displayed.

An image capture unit and computer readable medium used in combination therewith includes an image capturing sensor, a visual display, an instance of the computer readable medium, and circuitry for integrating functionalities thereof. The computer readable medium causes sensor data received from the image capturing sensor to be processed. The sensor data includes a plurality of image tiles and position indicating data defining a respective relative position of each one of each image tiles. Each one of each image tiles includes data representing a discrete portion of visual content. The computer readable medium causes a feedback image be displayed on the visual display. Displaying the feedback image includes correlate the relative position of each one of each image tiles with at least one other image tile that has been previously generated and displayed.