System and method for automatically modeling symbology data in a symbology reader

摘要

This invention overcomes the disadvantages of the prior art by providing a system and method for reading symbology, and more typically linear barcodes (“symbols”) that employs trained attributes that remain invariant between scans of different barcodes during runtime to tune various aspects of the procedure for locating and decoding such barcodes. The procedure relies upon a training step in which one or more exemplary barcodes are decoded and the invariant attributes for such barcodes, including, but not limited to, size, shape, relative angle in the image field of view and resolution are stored. The runtime decoding procedure then employs these attributes to constrain the search for subsequent, scanned barcodes and then decode it according to a plurality of tuned steps.

主权项

1. A system for searching and decoding runtime symbols comprising:
a training process that searches for and decodes an exemplary symbol within a first image and thereby derives and stores invariant symbol attributes with respect to predetermined invariant characteristics possessed by the exemplary symbol including invariant dimensional attributes, the stored invariant symbol attributes determining a tuned boundary associated with the exemplary symbol; a tuned runtime search process that constrains a search for a runtime symbol within a subsequent image based upon the stored invariant symbol attributes and the tuned boundary, and thereby determines a runtime boundary of the runtime symbol within the subsequent image; and a runtime decoding process that decodes data contained within the runtime symbol using the runtime boundary of the runtime symbol and the stored invariant symbol attributes in the subsequent image.