Method of effectively reading data written on data sheet, and data reading apparatus therefor

摘要

In a character reading apparatus, a slip image having three reference marks printed at three of the four predetermined corners of the slip is stored in an image buffer. The image in the image buffer is scanned to detect the three reference marks. A feed orientation of the slip is determined on the basis of the layout of the three reference marks. Data can be read on the basis of the detected three reference marks and the determined feed orientation of the slip.