Importance

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Abstract

A bar code symbol imaged by a two-dimensional imaging apparatus is stored in a frame memory. Based on the stored information, a position sensing section of a data processing apparatus senses position information units of at least two points from among position information units of four corners of the bar code image symbol projected on a photoelectric conversion surface of the two-dimensional imaging apparatus. On the basis of the sensed position information units, a slope sensing section estimates position information of the bar code symbol. Based on this position information, a reading section successively reads information of the bar code symbol from the frame memory. A decoding section decodes the read information to the original information.

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First Claim