Two-dimensional symbol and method for reading same

摘要

Disclosed is an identification symbol and system and method for reading in accordance with the present invention is preferably a two-dimensional, rectangular or square bar code symbol having a solid border, a tick-mark region adjacent to the solid border, a omni-directional reading and error detection and correction capability.

主权项

1. A method of reading an information symbol having:
four borders defining an interior region; and data cells within the interior region comprising a plurality of first shade tick marks and plurality of second shade tick marks, the method including:
acquiring an image of the information symbol;identifying plural borderlines in the image of the information symbol;determining location information for a plurality of data cells;reducing projection distortion in the image of the information symbol;modifying the location information of the image as a result of the reduction of projection distortion; anddecoding data in the data cells of the image of the information symbol.