Document reading apparatus which prevents a discrepancy between the reading results obtained in different reading modes

摘要

The digital copier comprises a document table for supporting a document, a document tray for receiving documents, a line sensor for reading an image from each document in units of lines parallel to a main scanning direction, a sensor transporter for transporting the sensor to scan the document on the table from one reading surface edge in the sub-scanning direction during the table-document reading mode, a document feeder for feeding each document received in the tray such that the document is scanned from another reading surface edge in the sub-scanning direction during the feeder-document reading mode, and a processing section for processing a reading result of the sensor. Particularly, the processing section has a controller for controlling the read start timing to compensate for a read range which may deviate with respect to an identical effective reading area of each document between the reading modes.