Package com.google.zxing.datamatrix
Class DataMatrixReader
- java.lang.Object
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- com.google.zxing.datamatrix.DataMatrixReader
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Field Summary
Fields Modifier and Type Field Description private Decoder
decoder
private static ResultPoint[]
NO_POINTS
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Constructor Summary
Constructors Constructor Description DataMatrixReader()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Result
decode(BinaryBitmap image)
Locates and decodes a Data Matrix code in an image.Result
decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints)
Locates and decodes a barcode in some format within an image.private static BitMatrix
extractPureBits(BitMatrix image)
This method detects a code in a "pure" image -- that is, pure monochrome image which contains only an unrotated, unskewed, image of a code, with some white border around it.private static int
moduleSize(int[] leftTopBlack, BitMatrix image)
void
reset()
Resets any internal state the implementation has after a decode, to prepare it for reuse.
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Field Detail
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NO_POINTS
private static final ResultPoint[] NO_POINTS
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decoder
private final Decoder decoder
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Method Detail
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decode
public Result decode(BinaryBitmap image) throws NotFoundException, ChecksumException, FormatException
Locates and decodes a Data Matrix code in an image.- Specified by:
decode
in interfaceReader
- Parameters:
image
- image of barcode to decode- Returns:
- a String representing the content encoded by the Data Matrix code
- Throws:
NotFoundException
- if a Data Matrix code cannot be foundFormatException
- if a Data Matrix code cannot be decodedChecksumException
- if error correction fails
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decode
public Result decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints) throws NotFoundException, ChecksumException, FormatException
Description copied from interface:Reader
Locates and decodes a barcode in some format within an image. This method also accepts hints, each possibly associated to some data, which may help the implementation decode.- Specified by:
decode
in interfaceReader
- Parameters:
image
- image of barcode to decodehints
- passed as aMap
fromDecodeHintType
to arbitrary data. The meaning of the data depends upon the hint type. The implementation may or may not do anything with these hints.- Returns:
- String which the barcode encodes
- Throws:
NotFoundException
- if no potential barcode is foundChecksumException
- if a potential barcode is found but does not pass its checksumFormatException
- if a potential barcode is found but format is invalid
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reset
public void reset()
Description copied from interface:Reader
Resets any internal state the implementation has after a decode, to prepare it for reuse.
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extractPureBits
private static BitMatrix extractPureBits(BitMatrix image) throws NotFoundException
This method detects a code in a "pure" image -- that is, pure monochrome image which contains only an unrotated, unskewed, image of a code, with some white border around it. This is a specialized method that works exceptionally fast in this special case.- Throws:
NotFoundException
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moduleSize
private static int moduleSize(int[] leftTopBlack, BitMatrix image) throws NotFoundException
- Throws:
NotFoundException
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