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

Example 26 with ReaderException

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

the class GUIRunner method getDecodeText.

private static String getDecodeText(Path file) {
    BufferedImage image;
    try {
        image = ImageReader.readImage(file.toUri());
    } catch (IOException ioe) {
        return ioe.toString();
    }
    LuminanceSource source = new BufferedImageLuminanceSource(image);
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    Result result;
    try {
        result = new MultiFormatReader().decode(bitmap);
    } catch (ReaderException re) {
        return re.toString();
    }
    return String.valueOf(result.getText());
}

Example 27 with ReaderException

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

the class AbstractBlackBoxTestCase method testBlackBoxCountingResults.

private void testBlackBoxCountingResults(boolean assertOnFailure) throws IOException {
    assertFalse(testResults.isEmpty());
    List<Path> imageFiles = getImageFiles();
    int testCount = testResults.size();
    int[] passedCounts = new int[testCount];
    int[] misreadCounts = new int[testCount];
    int[] tryHarderCounts = new int[testCount];
    int[] tryHarderMisreadCounts = new int[testCount];
    for (Path testImage : imageFiles) {
        log.info(String.format("Starting %s", testImage));
        BufferedImage image = ImageIO.read(testImage.toFile());
        String testImageFileName = testImage.getFileName().toString();
        String fileBaseName = testImageFileName.substring(0, testImageFileName.indexOf('.'));
        Path expectedTextFile = testBase.resolve(fileBaseName + ".txt");
        String expectedText;
        if (Files.exists(expectedTextFile)) {
            expectedText = readFileAsString(expectedTextFile, StandardCharsets.UTF_8);
        } else {
            expectedTextFile = testBase.resolve(fileBaseName + ".bin");
            assertTrue(Files.exists(expectedTextFile));
            expectedText = readFileAsString(expectedTextFile, StandardCharsets.ISO_8859_1);
        }
        Path expectedMetadataFile = testBase.resolve(fileBaseName + ".metadata.txt");
        Properties expectedMetadata = new Properties();
        if (Files.exists(expectedMetadataFile)) {
            try (BufferedReader reader = Files.newBufferedReader(expectedMetadataFile, StandardCharsets.UTF_8)) {
                expectedMetadata.load(reader);
            }
        }
        for (int x = 0; x < testCount; x++) {
            float rotation = testResults.get(x).getRotation();
            BufferedImage rotatedImage = rotateImage(image, rotation);
            LuminanceSource source = new BufferedImageLuminanceSource(rotatedImage);
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
            try {
                if (decode(bitmap, rotation, expectedText, expectedMetadata, false)) {
                    passedCounts[x]++;
                } else {
                    misreadCounts[x]++;
                }
            } catch (ReaderException ignored) {
                log.fine(String.format("could not read at rotation %f", rotation));
            }
            try {
                if (decode(bitmap, rotation, expectedText, expectedMetadata, true)) {
                    tryHarderCounts[x]++;
                } else {
                    tryHarderMisreadCounts[x]++;
                }
            } catch (ReaderException ignored) {
                log.fine(String.format("could not read at rotation %f w/TH", rotation));
            }
        }
    }
    // Print the results of all tests first
    int totalFound = 0;
    int totalMustPass = 0;
    int totalMisread = 0;
    int totalMaxMisread = 0;
    for (int x = 0; x < testResults.size(); x++) {
        TestResult testResult = testResults.get(x);
        log.info(String.format("Rotation %d degrees:", (int) testResult.getRotation()));
        log.info(String.format(" %d of %d images passed (%d required)", passedCounts[x], imageFiles.size(), testResult.getMustPassCount()));
        int failed = imageFiles.size() - passedCounts[x];
        log.info(String.format(" %d failed due to misreads, %d not detected", misreadCounts[x], failed - misreadCounts[x]));
        log.info(String.format(" %d of %d images passed with try harder (%d required)", tryHarderCounts[x], imageFiles.size(), testResult.getTryHarderCount()));
        failed = imageFiles.size() - tryHarderCounts[x];
        log.info(String.format(" %d failed due to misreads, %d not detected", tryHarderMisreadCounts[x], failed - tryHarderMisreadCounts[x]));
        totalFound += passedCounts[x] + tryHarderCounts[x];
        totalMustPass += testResult.getMustPassCount() + testResult.getTryHarderCount();
        totalMisread += misreadCounts[x] + tryHarderMisreadCounts[x];
        totalMaxMisread += testResult.getMaxMisreads() + testResult.getMaxTryHarderMisreads();
    }
    int totalTests = imageFiles.size() * testCount * 2;
    log.info(String.format("Decoded %d images out of %d (%d%%, %d required)", totalFound, totalTests, totalFound * 100 / totalTests, totalMustPass));
    if (totalFound > totalMustPass) {
        log.warning(String.format("+++ Test too lax by %d images", totalFound - totalMustPass));
    } else if (totalFound < totalMustPass) {
        log.warning(String.format("--- Test failed by %d images", totalMustPass - totalFound));
    }
    if (totalMisread < totalMaxMisread) {
        log.warning(String.format("+++ Test expects too many misreads by %d images", totalMaxMisread - totalMisread));
    } else if (totalMisread > totalMaxMisread) {
        log.warning(String.format("--- Test had too many misreads by %d images", totalMisread - totalMaxMisread));
    }
    // Then run through again and assert if any failed
    if (assertOnFailure) {
        for (int x = 0; x < testCount; x++) {
            TestResult testResult = testResults.get(x);
            String label = "Rotation " + testResult.getRotation() + " degrees: Too many images failed";
            assertTrue(label, passedCounts[x] >= testResult.getMustPassCount());
            assertTrue("Try harder, " + label, tryHarderCounts[x] >= testResult.getTryHarderCount());
            label = "Rotation " + testResult.getRotation() + " degrees: Too many images misread";
            assertTrue(label, misreadCounts[x] <= testResult.getMaxMisreads());
            assertTrue("Try harder, " + label, tryHarderMisreadCounts[x] <= testResult.getMaxTryHarderMisreads());
        }
    }
}

Example 28 with ReaderException

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

the class PDF417BlackBox4TestCase method testPDF417BlackBoxCountingResults.

private void testPDF417BlackBoxCountingResults(boolean assertOnFailure) throws IOException {
    assertFalse(testResults.isEmpty());
    Map<String, List<Path>> imageFiles = getImageFileLists();
    int testCount = testResults.size();
    int[] passedCounts = new int[testCount];
    int[] tryHarderCounts = new int[testCount];
    Path testBase = getTestBase();
    for (Entry<String, List<Path>> testImageGroup : imageFiles.entrySet()) {
        log.fine(String.format("Starting Image Group %s", testImageGroup.getKey()));
        String fileBaseName = testImageGroup.getKey();
        String expectedText;
        Path expectedTextFile = testBase.resolve(fileBaseName + ".txt");
        if (Files.exists(expectedTextFile)) {
            expectedText = readFileAsString(expectedTextFile, StandardCharsets.UTF_8);
        } else {
            expectedTextFile = testBase.resolve(fileBaseName + ".bin");
            assertTrue(Files.exists(expectedTextFile));
            expectedText = readFileAsString(expectedTextFile, StandardCharsets.ISO_8859_1);
        }
        for (int x = 0; x < testCount; x++) {
            List<Result> results = new ArrayList<>();
            for (Path imageFile : testImageGroup.getValue()) {
                BufferedImage image = ImageIO.read(imageFile.toFile());
                float rotation = testResults.get(x).getRotation();
                BufferedImage rotatedImage = rotateImage(image, rotation);
                LuminanceSource source = new BufferedImageLuminanceSource(rotatedImage);
                BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
                try {
                    results.addAll(Arrays.asList(decode(bitmap, false)));
                } catch (ReaderException ignored) {
                // ignore
                }
            }
            Collections.sort(results, new Comparator<Result>() {

                @Override
                public int compare(Result arg0, Result arg1) {
                    PDF417ResultMetadata resultMetadata = getMeta(arg0);
                    PDF417ResultMetadata otherResultMetadata = getMeta(arg1);
                    return resultMetadata.getSegmentIndex() - otherResultMetadata.getSegmentIndex();
                }
            });
            StringBuilder resultText = new StringBuilder();
            String fileId = null;
            for (Result result : results) {
                PDF417ResultMetadata resultMetadata = getMeta(result);
                assertNotNull("resultMetadata", resultMetadata);
                if (fileId == null) {
                    fileId = resultMetadata.getFileId();
                }
                assertEquals("FileId", fileId, resultMetadata.getFileId());
                resultText.append(result.getText());
            }
            assertEquals("ExpectedText", expectedText, resultText.toString());
            passedCounts[x]++;
            tryHarderCounts[x]++;
        }
    }
    // Print the results of all tests first
    int totalFound = 0;
    int totalMustPass = 0;
    int numberOfTests = imageFiles.keySet().size();
    for (int x = 0; x < testResults.size(); x++) {
        TestResult testResult = testResults.get(x);
        log.info(String.format("Rotation %d degrees:", (int) testResult.getRotation()));
        log.info(String.format(" %d of %d images passed (%d required)", passedCounts[x], numberOfTests, testResult.getMustPassCount()));
        log.info(String.format(" %d of %d images passed with try harder (%d required)", tryHarderCounts[x], numberOfTests, testResult.getTryHarderCount()));
        totalFound += passedCounts[x] + tryHarderCounts[x];
        totalMustPass += testResult.getMustPassCount() + testResult.getTryHarderCount();
    }
    int totalTests = numberOfTests * testCount * 2;
    log.info(String.format("Decoded %d images out of %d (%d%%, %d required)", totalFound, totalTests, totalFound * 100 / totalTests, totalMustPass));
    if (totalFound > totalMustPass) {
        log.warning(String.format("+++ Test too lax by %d images", totalFound - totalMustPass));
    } else if (totalFound < totalMustPass) {
        log.warning(String.format("--- Test failed by %d images", totalMustPass - totalFound));
    }
    // Then run through again and assert if any failed
    if (assertOnFailure) {
        for (int x = 0; x < testCount; x++) {
            TestResult testResult = testResults.get(x);
            String label = "Rotation " + testResult.getRotation() + " degrees: Too many images failed";
            assertTrue(label, passedCounts[x] >= testResult.getMustPassCount());
            assertTrue("Try harder, " + label, tryHarderCounts[x] >= testResult.getTryHarderCount());
        }
    }
}

Example 29 with ReaderException

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

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);
    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;
    }
    int middle = height / 2;
    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 30 with ReaderException

use of com.google.zxing.ReaderException in project QRCode by 5peak2me.

the class DecodeHandler method decode.

/**
	 * Decode the data within the viewfinder rectangle, and time how long it
	 * took. For efficiency, reuse the same reader objects from one decode to
	 * the next.
	 * 
	 * @param data
	 *            The YUV preview frame.
	 * @param width
	 *            The width of the preview frame.
	 * @param height
	 *            The height of the preview frame.
	 */
private void decode(byte[] data, int width, int height) {
    long start = System.currentTimeMillis();
    Result rawResult = null;
    // modify here
    byte[] rotatedData = new byte[data.length];
    for (int y = 0; y < height; y++) {
        for (int x = 0; x < width; x++) rotatedData[x * height + height - y - 1] = data[x + y * width];
    }
    // Here we are swapping, that's the difference to #11
    int tmp = width;
    width = height;
    height = tmp;
    PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(rotatedData, width, height);
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    try {
        rawResult = multiFormatReader.decodeWithState(bitmap);
    } catch (ReaderException re) {
    // continue
    } finally {
        multiFormatReader.reset();
    }
    if (rawResult != null) {
        long end = System.currentTimeMillis();
        Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
        Message message = Message.obtain(activity.getHandler(), R.id.decode_succeeded, rawResult);
        Bundle bundle = new Bundle();
        bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
        message.setData(bundle);
        // Log.d(TAG, "Sending decode succeeded message...");
        message.sendToTarget();
    } else {
        Message message = Message.obtain(activity.getHandler(), R.id.decode_failed);
        message.sendToTarget();
    }
}