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

Claim 0:
1. 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 buffer configured to store image data obtained by the plurality of linear image sensors reading a predetermined line of the document; and
a circuit including at least one processor, and configured to perform:
determining image data that corresponds to a plurality of overlapping regions by reading out the image data stored in the buffer;
synthesizing first image data obtained by a first linear image sensor and second image data obtained by a second linear sensor so as to generate image data of each of the plurality of overlapping regions, the first linear image sensor and the second linear sensor being adjacent in the main scanning direction among the plurality of linear image sensors;
generating image data of the predetermined line of the document based on image data in which the image data of each of the plurality of overlapping regions are excluded from the image data stored in the buffer and the image data of each of the plurality of overlapping regions generated by the synthesizing; and
repeatedly executing, in a sub-scanning direction of the document, the determining, the synthesizing, and the generating on the predetermined line of the document.