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US 2011/0215152 A1Published application
Method and Apparatus for Creating Pixel Tokens from Machine-Readable Symbols to Improve Decoding Accuracy in Low Resolution Images
AssigneeSeiko Epson Corporation
InventorsEunice Poon, Jia Li, Seungsik Kwak, Mikhail Brusnitsyn
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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.
Claims19
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.
A computer readable medium encoded with instructions for decoding a bar code comprising:
- 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.
A system for decoding a bar code including:
- 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.
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Dependencies are inferred from the claim text.