Class Decoder
java.lang.Object
com.google.zxing.datamatrix.decoder.Decoder
The main class which implements Data Matrix Code decoding -- as opposed to locating and extracting the Data Matrix Code from an image.
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Field Summary
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprivate int
correctErrors
(byte[] codewordBytes, int numDataCodewords) Given data and error-correction codewords received, possibly corrupted by errors, attempts to correct the errors in-place using Reed-Solomon error correction.decode
(boolean[][] image) Convenience method that can decode a Data Matrix Code represented as a 2D array of booleans.Decodes a Data Matrix Code represented as aBitMatrix
.
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Field Details
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rsDecoder
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Constructor Details
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Decoder
public Decoder()
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Method Details
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decode
Convenience method that can decode a Data Matrix Code represented as a 2D array of booleans. "true" is taken to mean a black module.
- Parameters:
image
- booleans representing white/black Data Matrix Code modules- Returns:
- text and bytes encoded within the Data Matrix Code
- Throws:
FormatException
- if the Data Matrix Code cannot be decodedChecksumException
- if error correction fails
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decode
Decodes a Data Matrix Code represented as a
BitMatrix
. A 1 or "true" is taken to mean a black module.- Parameters:
bits
- booleans representing white/black Data Matrix Code modules- Returns:
- text and bytes encoded within the Data Matrix Code
- Throws:
FormatException
- if the Data Matrix Code cannot be decodedChecksumException
- if error correction fails
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correctErrors
Given data and error-correction codewords received, possibly corrupted by errors, attempts to correct the errors in-place using Reed-Solomon error correction.
- Parameters:
codewordBytes
- data and error correction codewordsnumDataCodewords
- number of codewords that are data bytes- Returns:
- the number of errors corrected
- Throws:
ChecksumException
- if error correction fails
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