Reading method of the two-dimensional bar code

Details Reading method of the two-dimensional bar code Reading method of the two-dimensional bar code

2006-12-05

2006-12-05

Kim, Ahshik (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S462260, C235S462250

Reexamination Certificate

active

07143948

ABSTRACT:
A two-dimensional bar code printed on a piece of paper is photographed by the area sensor. A reading method of this bar code includes a process for correcting the distortion of the image of the two-dimensional bar code obtained from the area sensor by the projection transform, a process for correcting bright spots appearing in the image, and a process for decoding the two-dimensional bar code based on the image data of the two-dimensional bar code corrected by the two processes. This invention enables size-reduction of the reading device of the two-dimensional bar code and also achieves a higher reading speed of the reading device.

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