use of com.google.zxing.common.GlobalHistogramBinarizer 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);
}
}
use of com.google.zxing.common.GlobalHistogramBinarizer in project zxing by zxing.
the class RSSExpandedInternalTestCase method testFindFinderPatterns.
@Test
public void testFindFinderPatterns() throws Exception {
BufferedImage image = readImage("2.png");
BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
int rowNumber = binaryMap.getHeight() / 2;
BitArray row = binaryMap.getBlackRow(rowNumber, null);
List<ExpandedPair> previousPairs = new ArrayList<>();
RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
ExpandedPair pair1 = rssExpandedReader.retrieveNextPair(row, previousPairs, rowNumber);
previousPairs.add(pair1);
FinderPattern finderPattern = pair1.getFinderPattern();
assertNotNull(finderPattern);
assertEquals(0, finderPattern.getValue());
ExpandedPair pair2 = rssExpandedReader.retrieveNextPair(row, previousPairs, rowNumber);
previousPairs.add(pair2);
finderPattern = pair2.getFinderPattern();
assertNotNull(finderPattern);
assertEquals(1, finderPattern.getValue());
ExpandedPair pair3 = rssExpandedReader.retrieveNextPair(row, previousPairs, rowNumber);
previousPairs.add(pair3);
finderPattern = pair3.getFinderPattern();
assertNotNull(finderPattern);
assertEquals(1, finderPattern.getValue());
try {
rssExpandedReader.retrieveNextPair(row, previousPairs, rowNumber);
// the previous was the last pair
fail(NotFoundException.class.getName() + " expected");
} catch (NotFoundException nfe) {
// ok
}
}
use of com.google.zxing.common.GlobalHistogramBinarizer 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());
}
use of com.google.zxing.common.GlobalHistogramBinarizer in project zxing by zxing.
the class RSSExpandedImage2resultTestCase method assertCorrectImage2result.
private static void assertCorrectImage2result(String fileName, ExpandedProductParsedResult 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);
Result theResult;
try {
RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
theResult = rssExpandedReader.decodeRow(rowNumber, row, null);
} catch (ReaderException re) {
fail(re.toString());
return;
}
assertSame(BarcodeFormat.RSS_EXPANDED, theResult.getBarcodeFormat());
ParsedResult result = ResultParser.parseResult(theResult);
assertEquals(expected, result);
}
use of com.google.zxing.common.GlobalHistogramBinarizer in project zxing by zxing.
the class RSSExpandedImage2stringTestCase method assertCorrectImage2string.
private static void assertCorrectImage2string(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);
Result result;
try {
RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
result = rssExpandedReader.decodeRow(rowNumber, row, null);
} catch (ReaderException re) {
fail(re.toString());
return;
}
assertSame(BarcodeFormat.RSS_EXPANDED, result.getBarcodeFormat());
assertEquals(expected, result.getText());
}
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