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

Example 1 with ReaderException

use of com.google.zxing.ReaderException in project zxing by zxing.

the class DecodeServlet method processImage.

private static void processImage(BufferedImage image, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
    LuminanceSource source = new BufferedImageLuminanceSource(image);
    BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source));
    Collection<Result> results = new ArrayList<>(1);
    try {
        Reader reader = new MultiFormatReader();
        ReaderException savedException = null;
        try {
            // Look for multiple barcodes
            MultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader);
            Result[] theResults = multiReader.decodeMultiple(bitmap, HINTS);
            if (theResults != null) {
                results.addAll(Arrays.asList(theResults));
            }
        } catch (ReaderException re) {
            savedException = re;
        }
        if (results.isEmpty()) {
            try {
                // Look for pure barcode
                Result theResult = reader.decode(bitmap, HINTS_PURE);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                // Look for normal barcode in photo
                Result theResult = reader.decode(bitmap, HINTS);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                // Try again with other binarizer
                BinaryBitmap hybridBitmap = new BinaryBitmap(new HybridBinarizer(source));
                Result theResult = reader.decode(hybridBitmap, HINTS);
                if (theResult != null) {
                    results.add(theResult);
                }
            } catch (ReaderException re) {
                savedException = re;
            }
        }
        if (results.isEmpty()) {
            try {
                throw savedException == null ? NotFoundException.getNotFoundInstance() : savedException;
            } catch (FormatException | ChecksumException e) {
                log.info(e.toString());
                errorResponse(request, response, "format");
            } catch (ReaderException e) {
                // Including NotFoundException
                log.info(e.toString());
                errorResponse(request, response, "notfound");
            }
            return;
        }
    } catch (RuntimeException re) {
        // Call out unexpected errors in the log clearly
        log.log(Level.WARNING, "Unexpected exception from library", re);
        throw new ServletException(re);
    }
    String fullParameter = request.getParameter("full");
    boolean minimalOutput = fullParameter != null && !Boolean.parseBoolean(fullParameter);
    if (minimalOutput) {
        response.setContentType(MediaType.PLAIN_TEXT_UTF_8.toString());
        response.setCharacterEncoding(StandardCharsets.UTF_8.name());
        try (Writer out = new OutputStreamWriter(response.getOutputStream(), StandardCharsets.UTF_8)) {
            for (Result result : results) {
                out.write(result.getText());
                out.write('\n');
            }
        }
    } else {
        request.setAttribute("results", results);
        request.getRequestDispatcher("decoderesult.jspx").forward(request, response);
    }
}

Example 2 with ReaderException

use of com.google.zxing.ReaderException in project zxing by zxing.

the class BenchmarkAsyncTask method decode.

private static BenchmarkItem decode(MultiFormatReader reader, File file) {
    Bitmap imageBitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
    if (imageBitmap == null) {
        Log.e(TAG, "Couldn't open " + file);
        return null;
    }
    int width = imageBitmap.getWidth();
    int height = imageBitmap.getHeight();
    int[] pixels = new int[width * height];
    imageBitmap.getPixels(pixels, 0, width, 0, 0, width, height);
    RGBLuminanceSource source = new RGBLuminanceSource(width, height, pixels);
    BenchmarkItem item = new BenchmarkItem(file, RUNS);
    for (int x = 0; x < RUNS; x++) {
        boolean success;
        Result result = null;
        // Using this call instead of getting the time should eliminate a lot of variability due to
        // scheduling and what else is happening in the system.
        long now = Debug.threadCpuTimeNanos();
        try {
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
            result = reader.decodeWithState(bitmap);
            success = true;
        } catch (ReaderException ignored) {
            success = false;
        }
        now = Debug.threadCpuTimeNanos() - now;
        if (x == 0) {
            item.setDecoded(success);
            item.setFormat(result != null ? result.getBarcodeFormat() : null);
        }
        item.addResult((int) (now / 1000));
    }
    return item;
}

Example 3 with ReaderException

use of com.google.zxing.ReaderException in project zxing by zxing.

the class AbstractBlackBoxTestCase method decode.

private boolean decode(BinaryBitmap source, float rotation, String expectedText, Map<?, ?> expectedMetadata, boolean tryHarder) throws ReaderException {
    String suffix = String.format(" (%srotation: %d)", tryHarder ? "try harder, " : "", (int) rotation);
    Map<DecodeHintType, Object> hints = new EnumMap<>(DecodeHintType.class);
    if (tryHarder) {
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
    }
    // Try in 'pure' mode mostly to exercise PURE_BARCODE code paths for exceptions;
    // not expected to pass, generally
    Result result = null;
    try {
        Map<DecodeHintType, Object> pureHints = new EnumMap<>(hints);
        pureHints.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);
        result = barcodeReader.decode(source, pureHints);
    } catch (ReaderException re) {
    // continue
    }
    if (result == null) {
        result = barcodeReader.decode(source, hints);
    }
    if (expectedFormat != result.getBarcodeFormat()) {
        log.info(String.format("Format mismatch: expected '%s' but got '%s'%s", expectedFormat, result.getBarcodeFormat(), suffix));
        return false;
    }
    String resultText = result.getText();
    if (!expectedText.equals(resultText)) {
        log.info(String.format("Content mismatch: expected '%s' but got '%s'%s", expectedText, resultText, suffix));
        return false;
    }
    Map<ResultMetadataType, ?> resultMetadata = result.getResultMetadata();
    for (Map.Entry<?, ?> metadatum : expectedMetadata.entrySet()) {
        ResultMetadataType key = ResultMetadataType.valueOf(metadatum.getKey().toString());
        Object expectedValue = metadatum.getValue();
        Object actualValue = resultMetadata == null ? null : resultMetadata.get(key);
        if (!expectedValue.equals(actualValue)) {
            log.info(String.format("Metadata mismatch for key '%s': expected '%s' but got '%s'", key, expectedValue, actualValue));
            return false;
        }
    }
    return true;
}

Example 4 with ReaderException

use of com.google.zxing.ReaderException in project zxing by zxing.

the class AbstractNegativeBlackBoxTestCase method checkForFalsePositives.

/**
   * Make sure ZXing does NOT find a barcode in the image.
   *
   * @param image The image to test
   * @param rotationInDegrees The amount of rotation to apply
   * @return true if nothing found, false if a non-existent barcode was detected
   */
private boolean checkForFalsePositives(BufferedImage image, float rotationInDegrees) {
    BufferedImage rotatedImage = rotateImage(image, rotationInDegrees);
    LuminanceSource source = new BufferedImageLuminanceSource(rotatedImage);
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    Result result;
    try {
        result = getReader().decode(bitmap);
        log.info(String.format("Found false positive: '%s' with format '%s' (rotation: %d)", result.getText(), result.getBarcodeFormat(), (int) rotationInDegrees));
        return false;
    } catch (ReaderException re) {
    // continue
    }
    // Try "try harder" getMode
    Map<DecodeHintType, Object> hints = new EnumMap<>(DecodeHintType.class);
    hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
    try {
        result = getReader().decode(bitmap, hints);
        log.info(String.format("Try harder found false positive: '%s' with format '%s' (rotation: %d)", result.getText(), result.getBarcodeFormat(), (int) rotationInDegrees));
        return false;
    } catch (ReaderException re) {
    // continue
    }
    return true;
}

Example 5 with ReaderException

use of com.google.zxing.ReaderException in project zxing by zxing.

the class RSSExpandedImage2binaryTestCase method assertCorrectImage2binary.

private static void assertCorrectImage2binary(String fileName, String expected) throws IOException, NotFoundException {
    Path path = AbstractBlackBoxTestCase.buildTestBase("src/test/resources/blackbox/rssexpanded-1/").resolve(fileName);
    BufferedImage image = ImageIO.read(path.toFile());
    BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
    int rowNumber = binaryMap.getHeight() / 2;
    BitArray row = binaryMap.getBlackRow(rowNumber, null);
    List<ExpandedPair> pairs;
    try {
        RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
        pairs = rssExpandedReader.decodeRow2pairs(rowNumber, row);
    } catch (ReaderException re) {
        fail(re.toString());
        return;
    }
    BitArray binary = BitArrayBuilder.buildBitArray(pairs);
    assertEquals(expected, binary.toString());
}