Examples with NotFoundException com.google.zxing.NotFoundException used on opensource projects

Example 16 with NotFoundException

use of com.google.zxing.NotFoundException in project android-zxing by PearceXu.

the class RSSExpandedReader method retrieveNextPair.

// not private for testing
ExpandedPair retrieveNextPair(BitArray row, List<ExpandedPair> previousPairs, int rowNumber) throws NotFoundException {
    boolean isOddPattern = previousPairs.size() % 2 == 0;
    if (startFromEven) {
        isOddPattern = !isOddPattern;
    }
    FinderPattern pattern;
    boolean keepFinding = true;
    int forcedOffset = -1;
    do {
        this.findNextPair(row, previousPairs, forcedOffset);
        pattern = parseFoundFinderPattern(row, rowNumber, isOddPattern);
        if (pattern == null) {
            forcedOffset = getNextSecondBar(row, this.startEnd[0]);
        } else {
            keepFinding = false;
        }
    } while (keepFinding);
    // When stacked symbol is split over multiple rows, there's no way to guess if this pair can be last or not.
    // boolean mayBeLast = checkPairSequence(previousPairs, pattern);
    DataCharacter leftChar = this.decodeDataCharacter(row, pattern, isOddPattern, true);
    if (!previousPairs.isEmpty() && previousPairs.get(previousPairs.size() - 1).mustBeLast()) {
        throw NotFoundException.getNotFoundInstance();
    }
    DataCharacter rightChar;
    try {
        rightChar = this.decodeDataCharacter(row, pattern, isOddPattern, false);
    } catch (NotFoundException ignored) {
        rightChar = null;
    }
    return new ExpandedPair(leftChar, rightChar, pattern, true);
}

Example 17 with NotFoundException

use of com.google.zxing.NotFoundException in project weex-example by KalicyZhou.

the class OneDReader method doDecode.

/**
   * We're going to examine rows from the middle outward, searching alternately above and below the
   * middle, and farther out each time. rowStep is the number of rows between each successive
   * attempt above and below the middle. So we'd scan row middle, then middle - rowStep, then
   * middle + rowStep, then middle - (2 * rowStep), etc.
   * rowStep is bigger as the image is taller, but is always at least 1. We've somewhat arbitrarily
   * decided that moving up and down by about 1/16 of the image is pretty good; we try more of the
   * image if "trying harder".
   *
   * @param image The image to decode
   * @param hints Any hints that were requested
   * @return The contents of the decoded barcode
   * @throws NotFoundException Any spontaneous errors which occur
   */
private Result doDecode(BinaryBitmap image, Map<DecodeHintType, ?> hints) throws NotFoundException {
    int width = image.getWidth();
    int height = image.getHeight();
    BitArray row = new BitArray(width);
    int middle = height >> 1;
    boolean tryHarder = hints != null && hints.containsKey(DecodeHintType.TRY_HARDER);
    int rowStep = Math.max(1, height >> (tryHarder ? 8 : 5));
    int maxLines;
    if (tryHarder) {
        // Look at the whole image, not just the center
        maxLines = height;
    } else {
        // 15 rows spaced 1/32 apart is roughly the middle half of the image
        maxLines = 15;
    }
    for (int x = 0; x < maxLines; x++) {
        // Scanning from the middle out. Determine which row we're looking at next:
        int rowStepsAboveOrBelow = (x + 1) / 2;
        // i.e. is x even?
        boolean isAbove = (x & 0x01) == 0;
        int rowNumber = middle + rowStep * (isAbove ? rowStepsAboveOrBelow : -rowStepsAboveOrBelow);
        if (rowNumber < 0 || rowNumber >= height) {
            // Oops, if we run off the top or bottom, stop
            break;
        }
        // Estimate black point for this row and load it:
        try {
            row = image.getBlackRow(rowNumber, row);
        } catch (NotFoundException ignored) {
            continue;
        }
        // handle decoding upside down barcodes.
        for (int attempt = 0; attempt < 2; attempt++) {
            if (attempt == 1) {
                // trying again?
                // reverse the row and continue
                row.reverse();
                // that start on the center line.
                if (hints != null && hints.containsKey(DecodeHintType.NEED_RESULT_POINT_CALLBACK)) {
                    Map<DecodeHintType, Object> newHints = new EnumMap<>(DecodeHintType.class);
                    newHints.putAll(hints);
                    newHints.remove(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
                    hints = newHints;
                }
            }
            try {
                // Look for a barcode
                Result result = decodeRow(rowNumber, row, hints);
                // We found our barcode
                if (attempt == 1) {
                    // But it was upside down, so note that
                    result.putMetadata(ResultMetadataType.ORIENTATION, 180);
                    // And remember to flip the result points horizontally.
                    ResultPoint[] points = result.getResultPoints();
                    if (points != null) {
                        points[0] = new ResultPoint(width - points[0].getX() - 1, points[0].getY());
                        points[1] = new ResultPoint(width - points[1].getX() - 1, points[1].getY());
                    }
                }
                return result;
            } catch (ReaderException re) {
            // continue -- just couldn't decode this row
            }
        }
    }
    throw NotFoundException.getNotFoundInstance();
}

Example 18 with NotFoundException

use of com.google.zxing.NotFoundException in project weex-example by KalicyZhou.

the class RSSExpandedReader method parseFoundFinderPattern.

private FinderPattern parseFoundFinderPattern(BitArray row, int rowNumber, boolean oddPattern) {
    // Actually we found elements 2-5.
    int firstCounter;
    int start;
    int end;
    if (oddPattern) {
        // If pattern number is odd, we need to locate element 1 *before* the current block.
        int firstElementStart = this.startEnd[0] - 1;
        // Locate element 1
        while (firstElementStart >= 0 && !row.get(firstElementStart)) {
            firstElementStart--;
        }
        firstElementStart++;
        firstCounter = this.startEnd[0] - firstElementStart;
        start = firstElementStart;
        end = this.startEnd[1];
    } else {
        // If pattern number is even, the pattern is reversed, so we need to locate element 1 *after* the current block.
        start = this.startEnd[0];
        end = row.getNextUnset(this.startEnd[1] + 1);
        firstCounter = end - this.startEnd[1];
    }
    // Make 'counters' hold 1-4
    int[] counters = this.getDecodeFinderCounters();
    System.arraycopy(counters, 0, counters, 1, counters.length - 1);
    counters[0] = firstCounter;
    int value;
    try {
        value = parseFinderValue(counters, FINDER_PATTERNS);
    } catch (NotFoundException ignored) {
        return null;
    }
    return new FinderPattern(value, new int[] { start, end }, start, end, rowNumber);
}

Example 19 with NotFoundException

use of com.google.zxing.NotFoundException in project elastic-core-maven by OrdinaryDude.

the class DecodeQRCode method processRequest.

@Override
protected JSONStreamAware processRequest(HttpServletRequest request) throws NxtException {
    String qrCodeBase64 = Convert.nullToEmpty(request.getParameter("qrCodeBase64"));
    JSONObject response = new JSONObject();
    try {
        BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(ImageIO.read(new ByteArrayInputStream(Base64.getDecoder().decode(qrCodeBase64))))));
        Map hints = new HashMap();
        hints.put(DecodeHintType.POSSIBLE_FORMATS, EnumSet.of(BarcodeFormat.QR_CODE));
        hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
        Result qrCodeData = new MultiFormatReader().decode(binaryBitmap, hints);
        response.put("qrCodeData", qrCodeData.getText());
    } catch (IOException ex) {
        String errorMessage = "Error reading base64 byte stream";
        Logger.logErrorMessage(errorMessage, ex);
        JSONData.putException(response, ex, errorMessage);
    } catch (NullPointerException ex) {
        String errorMessage = "Invalid base64 image";
        Logger.logErrorMessage(errorMessage, ex);
        JSONData.putException(response, ex, errorMessage);
    } catch (NotFoundException ex) {
        response.put("qrCodeData", "");
    }
    return response;
}

Example 20 with NotFoundException

use of com.google.zxing.NotFoundException in project react-native-camera by react-native-community.

the class BarCodeScannerAsyncTask method doInBackground.

@Override
protected Result doInBackground(Void... ignored) {
    if (isCancelled() || mDelegate == null) {
        return null;
    }
    Result result = null;
    try {
        BinaryBitmap bitmap = generateBitmapFromImageData(mImageData, mWidth, mHeight);
        result = mMultiFormatReader.decodeWithState(bitmap);
    } catch (NotFoundException e) {
    // No barcode found, result is already null.
    } catch (Throwable t) {
        t.printStackTrace();
    }
    return result;
}