Package com.google.zxing.multi

Class GenericMultipleBarcodeReader

java.lang.Object

com.google.zxing.multi.GenericMultipleBarcodeReader

All Implemented Interfaces:

MultipleBarcodeReader

public final class GenericMultipleBarcodeReader
extends java.lang.Object
implements MultipleBarcodeReader

Attempts to locate multiple barcodes in an image by repeatedly decoding portion of the image. After one barcode is found, the areas left, above, right and below the barcode's ResultPoints are scanned, recursively.

A caller may want to also employ ByQuadrantReader when attempting to find multiple 2D barcodes, like QR Codes, in an image, where the presence of multiple barcodes might prevent detecting any one of them.

That is, instead of passing a Reader a caller might pass new ByQuadrantReader(reader).

Field Summary

Fields

Modifier and Type	Field	Description
private Reader	delegate
(package private) static Result[]	EMPTY_RESULT_ARRAY
private static int	MAX_DEPTH
private static int	MIN_DIMENSION_TO_RECUR

Constructor Summary

Constructors

Constructor	Description
GenericMultipleBarcodeReader(Reader delegate)

Method Summary

Modifier and Type	Method	Description
Result[]	decodeMultiple(BinaryBitmap image)
Result[]	decodeMultiple(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints)
private void	doDecodeMultiple(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints, java.util.List<Result> results, int xOffset, int yOffset, int currentDepth)
private static Result	translateResultPoints(Result result, int xOffset, int yOffset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MIN_DIMENSION_TO_RECUR

private static final int MIN_DIMENSION_TO_RECUR

See Also:

Constant Field Values

MAX_DEPTH

private static final int MAX_DEPTH

See Also:

Constant Field Values

EMPTY_RESULT_ARRAY

static final Result[] EMPTY_RESULT_ARRAY

delegate

private final Reader delegate

Constructor Detail

GenericMultipleBarcodeReader

public GenericMultipleBarcodeReader(Reader delegate)

Method Detail

decodeMultiple

public Result[] decodeMultiple(BinaryBitmap image)
                        throws NotFoundException

Specified by:

decodeMultiple in interface MultipleBarcodeReader

Throws:

NotFoundException

decodeMultiple

public Result[] decodeMultiple(BinaryBitmap image,
                               java.util.Map<DecodeHintType,?> hints)
                        throws NotFoundException

Specified by:

decodeMultiple in interface MultipleBarcodeReader

Throws:

NotFoundException

doDecodeMultiple

private void doDecodeMultiple(BinaryBitmap image,
                              java.util.Map<DecodeHintType,?> hints,
                              java.util.List<Result> results,
                              int xOffset,
                              int yOffset,
                              int currentDepth)

translateResultPoints

private static Result translateResultPoints(Result result,
                                            int xOffset,
                                            int yOffset)