A reading device includes a carriage configured to move in a sub-scanning direction with reference to an object placed on a contact glass, an optical sensor attached to the carriage, the optical sensor being configured to scan the object placed on the contact glass to obtain an image of the object, and a reference scale used as a reference when a dimension of the object is computed based on the image obtained by the optical sensor. In the reading device, the reference scale extends in a main scanning direction and a sub-scanning direction with reference to the object, and is disposed outside a range of image acquisition in which the optical sensor scans the object to obtain the image of the object as the carriage moves and inside a maximum movement range in which the carriage is movable and the optical sensor obtains the image of the object.

A recording system for recording a recording image based on image data by repeating a pass operation in which a nozzle column discharges ink while reciprocating relatively to a recording medium in a main scanning direction to form dots on the recording medium, and a conveying operation of relatively moving the nozzle column and the recording medium in a sub-scanning direction crossing the main scanning direction, the recording system including an assigning section for obtaining a plurality of halftone data which is generated with respect to the same area of the image data based on the image data, and which corresponds to the ink of a predetermined color, and then assigning each of the halftone data obtained to the pass operations in the same direction in reciprocation in the main scanning direction in a predetermined recording area.

A radiation imaging apparatus includes a pixel array including n pixel rows, where n≥3, and a driving circuit configured to scan the pixel array from a first row toward an n.sup.th row, counting from one end of the pixel array. In a case where a region of interest is included in a partial region composed of pixel rows from an i.sup.th row to a j.sup.th row, where 1<i≤j<n, the driving circuit starts scanning of the pixel array from the first row, and starts scanning of the pixel array from the first row again during scanning of pixel rows from a (j+1).sup.th row to the n.sup.th row.

A radiation imaging apparatus includes a pixel array including n pixel rows, where n3, and a driving circuit configured to scan the pixel array from a first row toward an n.sup.th row, counting from one end of the pixel array. In a case where a region of interest is included in a partial region composed of pixel rows from an i.sup.th row to a j.sup.th row, where 1<ij<n, the driving circuit starts scanning of the pixel array from the first row, and starts scanning of the pixel array from the first row again during scanning of pixel rows from a (j+1).sup.th row to the n.sup.th row.

A recording system for recording a recording image based on image data by repeating a pass operation in which a nozzle column discharges ink while reciprocating relatively to a recording medium in a main scanning direction to form dots on the recording medium, and a conveying operation of relatively moving the nozzle column and the recording medium in a sub-scanning direction crossing the main scanning direction, the recording system including an assigning section for obtaining a plurality of halftone data which is generated with respect to the same area of the image data based on the image data, and which corresponds to the ink of a predetermined color, and then assigning each of the halftone data obtained to the pass operations in the same direction in reciprocation in the main scanning direction in a predetermined recording area.

Example implementations relate to scan bar calibration. For example, a system for scan bar calibration may include instructions executable by a processing resource to implement a plurality of scanning settings at a scan bar index location of a scanning device. The system may further include instructions to execute a scan bar calibration of a calibration target at the scan bar index location, and generate a scan bar calibration table for the scan bar index location based on the executed scan bar calibration.