A scanner includes a generator that synthesizes output of a first sensor group and output of a second sensor group where the image data overlaps in part, and generates image data; and a controller that controls the second sensor group to synthesize and output the output of n photoelectric conversion elements at positions based on the relative positions of the first sensor group and second sensor group.

A print level information generating unit generates print level information representing the amount of ink to be applied to a predetermined area on a print medium. A print timing information generating unit generates print timing information indicating a timing, at which the ink is applied to the predetermined area. A print information combining unit outputs the print level information as the print information in a case where the amount of ink to be applied to the predetermined area is maximum or minimum. Moreover, the print information combining unit replaces a part of the print level information with at least a part of the print timing information so as to output, as the print information, information obtained by combining the print timing information and the print level information in a case where the amount of ink to be applied to the predetermined area is not maximum or minimum.

An image forming apparatus is configured to form an image on a recording medium by scanning of the image forming apparatus by a user. The image forming apparatus includes an image forming device and processing circuitry. The image forming device includes a plurality of image forming arrays. Each of the image forming arrays includes an image forming portion configured to form the image. The processing circuitry is configured to set an image forming array to be used to form the image, according to a use mode of the image forming apparatus.

An image forming apparatus is configured to form an image on a recording medium by scanning of the image forming apparatus by a user. The image forming apparatus includes an image forming device and processing circuitry. The image forming device includes a plurality of image forming arrays. Each of the image forming arrays includes an image forming portion configured to form the image. The processing circuitry is configured to set an image forming array to be used to form the image, according to a use mode of the image forming apparatus.

A sensor chip includes multiple photoelectric conversion elements, and a synthesis circuit that synthesizes outputs of n photoelectric conversion elements and outputs the outputs to an external device. The synthesis circuit synthesizes and outputs the outputs of the n photoelectric conversion elements at positions selected based on a control signal received from the external device.

A print level information generating unit generates print level information representing the amount of ink to be applied to a predetermined area on a print medium. A print timing information generating unit generates print timing information indicating a timing, at which the ink is applied to the predetermined area. A print information combining unit outputs the print level information as the print information in a case where the amount of ink to be applied to the predetermined area is maximum or minimum. Moreover, the print information combining unit replaces a part of the print level information with at least a part of the print timing information so as to output, as the print information, information obtained by combining the print timing information and the print level information in a case where the amount of ink to be applied to the predetermined area is not maximum or minimum.