Portable bar code reader having improved autodiscriminating features
First Claim
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1. A method for reading a reflective indicia utilizing a portable hand-held indicia reader including a one-dimensional image sensor, said method comprising:
- illuminating said reflective indicia with a light source having a frequency in a specified frequency range, said reflective indicia including a plurality of rows, each row including a row address pattern and at least one of a data codeword and an error detection codeword;
sweeping said hand-held indicia reader manually and asynchronously over said reflective indicia;
capturing an electronic representation of said reflective indicia by processing lighted reflected from said reflective indicia; and
analyzing said electronic representation of said reflective indicia to determine whether said reflective indicia is a one dimensional bar code symbol, said analyzing further including executing an automatic discrimination algorithm if said reflective indicia is a one dimensional bar code symbol.
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Abstract
A bar code reading device processing two-dimensional electronic representations in the decoding of bar code symbols, which can automatically discriminate between code symbologies such as PDF 417 code symbology and UPC code symbology. The bar code reading device may further have improved reprogramming features and improved menuing features.
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Citations
13 Claims
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1. A method for reading a reflective indicia utilizing a portable hand-held indicia reader including a one-dimensional image sensor, said method comprising:
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illuminating said reflective indicia with a light source having a frequency in a specified frequency range, said reflective indicia including a plurality of rows, each row including a row address pattern and at least one of a data codeword and an error detection codeword;
sweeping said hand-held indicia reader manually and asynchronously over said reflective indicia;
capturing an electronic representation of said reflective indicia by processing lighted reflected from said reflective indicia; and
analyzing said electronic representation of said reflective indicia to determine whether said reflective indicia is a one dimensional bar code symbol, said analyzing further including executing an automatic discrimination algorithm if said reflective indicia is a one dimensional bar code symbol. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A hand-held bar code reader for reading a reflective indicia, said bar code reader comprising:
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a housing, said housing capable of being gripped and differently oriented in space by a human operator;
an illumination system within said housing, said illumination system illuminating a plurality of rows of said reflective indicia as said hand-held bar code reader is manually and asynchronously moved over said reflective indicia, said illumination system including a light source having a frequency in a specified frequency range, each of said plurality of rows having a series of high and low reflectivity elements representing a row address pattern and at least one of a data codeword and an error detection codeword;
a one dimensional image sensor within said housing, said image sensor capturing an electronic representation of said reflective indicia by processing lighted reflected from said reflective indicia;
a microprocessor within said housing, said microprocessor in electrical communication with said illumination system and said image sensor; and
a computer memory within said housing and in electrical communication with at least said microprocessor, said computer memory including a software module that when executed by said microprocessor analyzes said electronic representation to determine whether said reflective indicia is a one dimensional bar code, said software module further including a one dimensional bar code autodiscrimination decoding algorithm executed by said microprocessor if said reflective indicia is determined to be a one dimensional bar code. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification