Java 类com.google.zxing.multi.MultipleBarcodeReader 实例源码

/**
 * Decode all barcodes in the image
 */
private String multiple(BufferedImage img) throws NotFoundException, ChecksumException, FormatException {
    long begin = System.currentTimeMillis();
    LuminanceSource source = new BufferedImageLuminanceSource(img);
    BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
    com.google.zxing.Reader reader = new MultiFormatReader();
    MultipleBarcodeReader bcReader = new GenericMultipleBarcodeReader(reader);
    Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
    hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
    StringBuilder sb = new StringBuilder();

    for (Result result : bcReader.decodeMultiple(bitmap, hints)) {
        sb.append(result.getText()).append(" ");
    }

    SystemProfiling.log(null, System.currentTimeMillis() - begin);
    log.trace("multiple.Time: {}", System.currentTimeMillis() - begin);
    return sb.toString();
}

@Test
public void testMultiQRCodes() throws Exception {
  // Very basic test for now
  Path testBase = AbstractBlackBoxTestCase.buildTestBase("src/test/resources/blackbox/multi-qrcode-1");

  Path testImage = testBase.resolve("1.png");
  BufferedImage image = ImageIO.read(testImage.toFile());
  LuminanceSource source = new BufferedImageLuminanceSource(image);
  BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

  MultipleBarcodeReader reader = new QRCodeMultiReader();
  Result[] results = reader.decodeMultiple(bitmap);
  assertNotNull(results);
  assertEquals(4, results.length);

  Set<String> barcodeContents = new HashSet<>();
  for (Result result : results) {
    barcodeContents.add(result.getText());
    assertEquals(BarcodeFormat.QR_CODE, result.getBarcodeFormat());
    Map<ResultMetadataType,Object> metadata = result.getResultMetadata();
    assertNotNull(metadata);
  }
  Set<String> expectedContents = new HashSet<>();
  expectedContents.add("You earned the class a 5 MINUTE DANCE PARTY!!  Awesome!  Way to go!  Let's boogie!");
  expectedContents.add("You earned the class 5 EXTRA MINUTES OF RECESS!!  Fabulous!!  Way to go!!");
  expectedContents.add("You get to SIT AT MRS. SIGMON'S DESK FOR A DAY!!  Awesome!!  Way to go!! Guess I better clean up! :)");
  expectedContents.add("You get to CREATE OUR JOURNAL PROMPT FOR THE DAY!  Yay!  Way to go!  ");
  assertEquals(expectedContents, barcodeContents);
}