Patent ID: 8411336
Filing Date: 2013-04-02
Classification: H04N

Abstract:
1. An image reader comprising: a feeder configured to feed a document sheet to a document reading position; a first reading sensor configured to read an image; a first reference member; a moving mechanism configured to move the first reading sensor to the document reading position to read an image of the document sheet fed by the feeder and a reference reading position to read an image of the first reference member; a controller configured to: a detector configured to detect the document sheet which is being fed by the feeder to the image reading position; wherein the controller controls the feeder to start feeding the document sheet to the document reading position before the first reading sensor reaches the document reading position from the reference reading position, wherein based on a first time when the detector detects the document sheet, the controller determines a second time when the document sheet fed by the feeder reaches the document reading position, wherein the controller determines a third time when the first reference member is to be read by the first reading sensor, based on the second time and a first time period, the first time period including: wherein the controller controls the first reading sensor to read the image of the first reference member at the third time.