METHOD AND PORTABLE APPARATUS FOR RECOGNIZING BAR CODES
First Claim
1. A method for the optical detection of a linear barcode pattern and for determining a symbol sequence which is coded by the barcode pattern, wherein the method proceeds from a blurred raw picture and comprises the following steps:
- taking a raw picture of the barcode pattern;
pre-processing the raw picture for producing a single output pattern or a sequence of output patterns;
comparing the output patterns or the single output pattern with stored reference patterns, wherein the reference patterns in each case correspond to blurred images of non-blurred nominal patterns, and at least one symbol is assigned to each reference pattern;
determining, for the single output pattern or for each of the sequence of output patterns, in each case the reference pattern which has the greatest similarity to the output pattern;
outputting, transmitting or storing the symbols which correspond to the determined reference patterns, according to the single output pattern or the sequence of output patterns, as a symbol sequence.
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Accused Products
Abstract
A method for optical recording of a linear barcode pattern and determination of a symbol sequence as defined by the barcode pattern from a blurred raw image and includes the following steps: taking a raw image of the barcode pattern, preprocessing the raw image to generate a series of output patterns, comparing the output pattern with stored reference patterns, wherein the reference patterns correspond to blurred images of sharp nominal patterns and each reference pattern is provided with at least one symbol, determining for each of the output patterns the reference pattern which most closely resembles the output pattern outputting, transmitting or storing the symbols corresponding to the determined reference pattern and following the sequence of output patterns, as a symbol sequence.
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Citations
14 Claims
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1. A method for the optical detection of a linear barcode pattern and for determining a symbol sequence which is coded by the barcode pattern, wherein the method proceeds from a blurred raw picture and comprises the following steps:
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taking a raw picture of the barcode pattern; pre-processing the raw picture for producing a single output pattern or a sequence of output patterns; comparing the output patterns or the single output pattern with stored reference patterns, wherein the reference patterns in each case correspond to blurred images of non-blurred nominal patterns, and at least one symbol is assigned to each reference pattern; determining, for the single output pattern or for each of the sequence of output patterns, in each case the reference pattern which has the greatest similarity to the output pattern; outputting, transmitting or storing the symbols which correspond to the determined reference patterns, according to the single output pattern or the sequence of output patterns, as a symbol sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification