Patent ID: 11949834
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. An image reading device comprising:
a plurality of linear image sensors that are arranged so that adjacent image sensors include an overlapping region in which portions of reading regions of the adjacent image sensors overlap in a main scanning direction in which a document is read;
a first buffer configured to store image data obtained by a first linear image sensor, which reads the document precedingly among the plurality of linear image sensors, reading an image of a predetermined line of the document;
a second buffer configured to store image data obtained by a second linear image sensor, which is subsequent to the first linear image sensor among the plurality of linear image sensors, reading an image of the predetermined line of the document; and
a circuit including at least one processor, and configured to perform:
synthesizing first image data that corresponds to the overlapping region among the image data stored in the first buffer and second image data that corresponds to the overlapping region among the image data stored in the second buffer so as to generate image data of the overlapping region;
generating image data of the predetermined line that corresponds to the first linear image sensor and the second linear image sensor based on image data in which image data of the overlapping region are excluded from the image data stored in the first buffer, image data in which the image data of the overlapping region are excluded from the image data stored in the second buffer, and the image data generated by the synthesizing; and
executing, across in a sub-scanning direction of the document, the synthesizing and the generating.