Prioritized searching methods for finding a coded symbol in a di

Details Prioritized searching methods for finding a coded symbol in a di Prioritized searching methods for finding a coded symbol in a di

1996-03-18

1998-06-09

Boudreau, Leo

Image analysis

Pattern recognition

Feature extraction

382312, G06K 900

Patent

active

057647984

ABSTRACT:
An electro-optical imaging system that utilizes an efficient search algorithm to find a coded symbol within a digitized image is provided. A digitized image of an area of an object having a coded symbol attached or printed thereon is created and stored in an image memory. A search algorithm is then activated to search for the coded symbol within the digitized image stored in the image memory. The search is limited to an area of the digitized image that is defined by boundary parameters. The search begins with the scan of an initial horizontal line of pixels that passes through the center of the search area, and an initial vertical line of pixels that also passes through the center of the search area. Subsequent horizontal and vertical lines of pixels are then scanned, one each subsequent line is located an integer multiple number of step sizes from one of the initial lines. Once the above described search pattern expands beyond the boundaries of the search area, the step sizes are reduced, and the search is continued.

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