use of com.google.zxing.ResultPointCallback in project zxing by zxing.
the class MultiDetector method detectMulti.
public DetectorResult[] detectMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
BitMatrix image = getImage();
ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image, resultPointCallback);
FinderPatternInfo[] infos = finder.findMulti(hints);
if (infos.length == 0) {
throw NotFoundException.getNotFoundInstance();
}
List<DetectorResult> result = new ArrayList<>();
for (FinderPatternInfo info : infos) {
try {
result.add(processFinderPatternInfo(info));
} catch (ReaderException e) {
// ignore
}
}
if (result.isEmpty()) {
return EMPTY_DETECTOR_RESULTS;
} else {
return result.toArray(new DetectorResult[result.size()]);
}
}
use of com.google.zxing.ResultPointCallback in project zxing by zxing.
the class UPCEANReader method decodeRow.
/**
* <p>Like {@link #decodeRow(int, BitArray, Map)}, but
* allows caller to inform method about where the UPC/EAN start pattern is
* found. This allows this to be computed once and reused across many implementations.</p>
*
* @param rowNumber row index into the image
* @param row encoding of the row of the barcode image
* @param startGuardRange start/end column where the opening start pattern was found
* @param hints optional hints that influence decoding
* @return {@link Result} encapsulating the result of decoding a barcode in the row
* @throws NotFoundException if no potential barcode is found
* @throws ChecksumException if a potential barcode is found but does not pass its checksum
* @throws FormatException if a potential barcode is found but format is invalid
*/
public Result decodeRow(int rowNumber, BitArray row, int[] startGuardRange, Map<DecodeHintType, ?> hints) throws NotFoundException, ChecksumException, FormatException {
ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
if (resultPointCallback != null) {
resultPointCallback.foundPossibleResultPoint(new ResultPoint((startGuardRange[0] + startGuardRange[1]) / 2.0f, rowNumber));
}
StringBuilder result = decodeRowStringBuffer;
result.setLength(0);
int endStart = decodeMiddle(row, startGuardRange, result);
if (resultPointCallback != null) {
resultPointCallback.foundPossibleResultPoint(new ResultPoint(endStart, rowNumber));
}
int[] endRange = decodeEnd(row, endStart);
if (resultPointCallback != null) {
resultPointCallback.foundPossibleResultPoint(new ResultPoint((endRange[0] + endRange[1]) / 2.0f, rowNumber));
}
// Make sure there is a quiet zone at least as big as the end pattern after the barcode. The
// spec might want more whitespace, but in practice this is the maximum we can count on.
int end = endRange[1];
int quietEnd = end + (end - endRange[0]);
if (quietEnd >= row.getSize() || !row.isRange(end, quietEnd, false)) {
throw NotFoundException.getNotFoundInstance();
}
String resultString = result.toString();
// UPC/EAN should never be less than 8 chars anyway
if (resultString.length() < 8) {
throw FormatException.getFormatInstance();
}
if (!checkChecksum(resultString)) {
throw ChecksumException.getChecksumInstance();
}
float left = (startGuardRange[1] + startGuardRange[0]) / 2.0f;
float right = (endRange[1] + endRange[0]) / 2.0f;
BarcodeFormat format = getBarcodeFormat();
Result decodeResult = new Result(resultString, // no natural byte representation for these barcodes
null, new ResultPoint[] { new ResultPoint(left, rowNumber), new ResultPoint(right, rowNumber) }, format);
int extensionLength = 0;
try {
Result extensionResult = extensionReader.decodeRow(rowNumber, row, endRange[1]);
decodeResult.putMetadata(ResultMetadataType.UPC_EAN_EXTENSION, extensionResult.getText());
decodeResult.putAllMetadata(extensionResult.getResultMetadata());
decodeResult.addResultPoints(extensionResult.getResultPoints());
extensionLength = extensionResult.getText().length();
} catch (ReaderException re) {
// continue
}
int[] allowedExtensions = hints == null ? null : (int[]) hints.get(DecodeHintType.ALLOWED_EAN_EXTENSIONS);
if (allowedExtensions != null) {
boolean valid = false;
for (int length : allowedExtensions) {
if (extensionLength == length) {
valid = true;
break;
}
}
if (!valid) {
throw NotFoundException.getNotFoundInstance();
}
}
if (format == BarcodeFormat.EAN_13 || format == BarcodeFormat.UPC_A) {
String countryID = eanManSupport.lookupCountryIdentifier(resultString);
if (countryID != null) {
decodeResult.putMetadata(ResultMetadataType.POSSIBLE_COUNTRY, countryID);
}
}
return decodeResult;
}
use of com.google.zxing.ResultPointCallback in project zxing by zxing.
the class RSS14Reader method decodePair.
private Pair decodePair(BitArray row, boolean right, int rowNumber, Map<DecodeHintType, ?> hints) {
try {
int[] startEnd = findFinderPattern(row, right);
FinderPattern pattern = parseFoundFinderPattern(row, rowNumber, right, startEnd);
ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
if (resultPointCallback != null) {
float center = (startEnd[0] + startEnd[1]) / 2.0f;
if (right) {
// row is actually reversed
center = row.getSize() - 1 - center;
}
resultPointCallback.foundPossibleResultPoint(new ResultPoint(center, rowNumber));
}
DataCharacter outside = decodeDataCharacter(row, pattern, true);
DataCharacter inside = decodeDataCharacter(row, pattern, false);
return new Pair(1597 * outside.getValue() + inside.getValue(), outside.getChecksumPortion() + 4 * inside.getChecksumPortion(), pattern);
} catch (NotFoundException ignored) {
return null;
}
}
use of com.google.zxing.ResultPointCallback in project weex-example by KalicyZhou.
the class MultiDetector method detectMulti.
public DetectorResult[] detectMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
BitMatrix image = getImage();
ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image, resultPointCallback);
FinderPatternInfo[] infos = finder.findMulti(hints);
if (infos.length == 0) {
throw NotFoundException.getNotFoundInstance();
}
List<DetectorResult> result = new ArrayList<>();
for (FinderPatternInfo info : infos) {
try {
result.add(processFinderPatternInfo(info));
} catch (ReaderException e) {
// ignore
}
}
if (result.isEmpty()) {
return EMPTY_DETECTOR_RESULTS;
} else {
return result.toArray(new DetectorResult[result.size()]);
}
}
use of com.google.zxing.ResultPointCallback in project zxing by zxing.
the class AztecReader method decode.
@Override
public Result decode(BinaryBitmap image, Map<DecodeHintType, ?> hints) throws NotFoundException, FormatException {
NotFoundException notFoundException = null;
FormatException formatException = null;
Detector detector = new Detector(image.getBlackMatrix());
ResultPoint[] points = null;
DecoderResult decoderResult = null;
try {
AztecDetectorResult detectorResult = detector.detect(false);
points = detectorResult.getPoints();
decoderResult = new Decoder().decode(detectorResult);
} catch (NotFoundException e) {
notFoundException = e;
} catch (FormatException e) {
formatException = e;
}
if (decoderResult == null) {
try {
AztecDetectorResult detectorResult = detector.detect(true);
points = detectorResult.getPoints();
decoderResult = new Decoder().decode(detectorResult);
} catch (NotFoundException | FormatException e) {
if (notFoundException != null) {
throw notFoundException;
}
if (formatException != null) {
throw formatException;
}
throw e;
}
}
if (hints != null) {
ResultPointCallback rpcb = (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
if (rpcb != null) {
for (ResultPoint point : points) {
rpcb.foundPossibleResultPoint(point);
}
}
}
Result result = new Result(decoderResult.getText(), decoderResult.getRawBytes(), decoderResult.getNumBits(), points, BarcodeFormat.AZTEC, System.currentTimeMillis());
List<byte[]> byteSegments = decoderResult.getByteSegments();
if (byteSegments != null) {
result.putMetadata(ResultMetadataType.BYTE_SEGMENTS, byteSegments);
}
String ecLevel = decoderResult.getECLevel();
if (ecLevel != null) {
result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);
}
return result;
}
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