Patent ID: 8542417

Claim:
An image reading apparatus comprising: a feeding device that feeds a document which belongs to a job; a first reading unit that scans an image of a first surface of the document fed by the feeding device; a second reading unit that scans an image of a second surface of the document fed by the feeding device, wherein the second surface is opposite to the first surface; a first processing unit that processes the image data read by the first reading unit when performing a double-sided reading; a second processing unit that processes the image data read by the second reading unit when performing the double-sided reading; a selector configured to select one of inputting the image data scanned by the first reading unit to the first processing unit and inputting the image data scanned by the first reading unit to the second processing unit, for each of one or more jobs; a control unit configured to receive an instruction instructing the first reading unit to perform a one-sided reading of a following document, which belongs to a following job, while the first processing unit is performing a processing of a one sided reading of a preceding document, which belongs to a preceding job, and, when the instruction is received, the control unit controlling the second processing unit to perform the processing of the one-sided reading of the following document scanned by the first reading unit; wherein the preceding document is a document belonging to a job that is first performed, wherein the following document is a document belonging to a job that is newly input; wherein an output destination of the processing unit performing the processing of the following document is different from an output destination of the processing unit performing the processing of the preceding document, and wherein the first processing unit and the second processing unit are operated asynchronously.