Package com.google.zxing.pdf417
Class PDF417Reader
- java.lang.Object
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- com.google.zxing.pdf417.PDF417Reader
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- All Implemented Interfaces:
MultipleBarcodeReader
,Reader
public final class PDF417Reader extends java.lang.Object implements Reader, MultipleBarcodeReader
This implementation can detect and decode PDF417 codes in an image.
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Field Summary
Fields Modifier and Type Field Description private static Result[]
EMPTY_RESULT_ARRAY
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Constructor Summary
Constructors Constructor Description PDF417Reader()
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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 PDF417 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 Result[]
decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints, boolean multiple)
Result[]
decodeMultiple(BinaryBitmap image)
Result[]
decodeMultiple(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints)
private static int
getMaxCodewordWidth(ResultPoint[] p)
private static int
getMaxWidth(ResultPoint p1, ResultPoint p2)
private static int
getMinCodewordWidth(ResultPoint[] p)
private static int
getMinWidth(ResultPoint p1, ResultPoint p2)
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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EMPTY_RESULT_ARRAY
private static final Result[] EMPTY_RESULT_ARRAY
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Method Detail
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decode
public Result decode(BinaryBitmap image) throws NotFoundException, FormatException, ChecksumException
Locates and decodes a PDF417 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 PDF417 code
- Throws:
NotFoundException
- if a PDF417 code cannot be found,FormatException
- if a PDF417 cannot be decodedChecksumException
- if a potential barcode is found but does not pass its checksum
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decode
public Result decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints) throws NotFoundException, FormatException, ChecksumException
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 foundFormatException
- if a potential barcode is found but format is invalidChecksumException
- if a potential barcode is found but does not pass its checksum
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decodeMultiple
public Result[] decodeMultiple(BinaryBitmap image) throws NotFoundException
- Specified by:
decodeMultiple
in interfaceMultipleBarcodeReader
- Throws:
NotFoundException
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decodeMultiple
public Result[] decodeMultiple(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints) throws NotFoundException
- Specified by:
decodeMultiple
in interfaceMultipleBarcodeReader
- Throws:
NotFoundException
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decode
private static Result[] decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints, boolean multiple) throws NotFoundException, FormatException, ChecksumException
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getMaxWidth
private static int getMaxWidth(ResultPoint p1, ResultPoint p2)
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getMinWidth
private static int getMinWidth(ResultPoint p1, ResultPoint p2)
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getMaxCodewordWidth
private static int getMaxCodewordWidth(ResultPoint[] p)
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getMinCodewordWidth
private static int getMinCodewordWidth(ResultPoint[] p)
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