Method and Apparatus for Creating Pixel Tokens from Machine-Readable Symbols to Improve Decoding Accuracy in Low Resolution Images
First Claim
Patent Images
1. A method for decoding a bar code comprising:
- segmenting the bar code into black tokens, white tokens and gray boundary pixels; and
calculating a boundary position of each token with sub-pixel positional accuracy using intensity values of pixels in a boundary region.
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Abstract
The present invention is directed towards systems and methods for decoding a bar code. Decoding the bar code includes segmenting the bar code into black tokens, white tokens and gray boundary pixels. Decoding the bar code also includes calculating a boundary position of each token with sub-pixel positional accuracy using intensity values of pixels in a boundary region.
6 Citations
19 Claims
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1. A method for decoding a bar code comprising:
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segmenting the bar code into black tokens, white tokens and gray boundary pixels; and calculating a boundary position of each token with sub-pixel positional accuracy using intensity values of pixels in a boundary region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer readable medium encoded with instructions for decoding a bar code comprising:
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instructions for segmenting the bar code into black tokens, white tokens and gray boundary pixels; and instructions for calculating a boundary position of each token with sub-pixel positional accuracy using intensity values of pixels in a boundary region.
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16. A system for decoding a bar code including:
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a processor with logic circuits; logic circuits configured to segment data representing the bar code into black tokens, white tokens and gray boundary pixels; and logic circuits for calculating a boundary position of each token with sub-pixel positional accuracy using intensity values of pixels in a boundary region. - View Dependent Claims (17, 18, 19)
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Specification