Java GlobalHistogramBinarizer类代码示例

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
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());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testRetrieveNextPairPatterns() throws Exception {
  BufferedImage image = readImage("3.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(0, finderPattern.getValue());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testDecodeDataCharacter() throws Exception {
  BufferedImage image = readImage("3.png");
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);

  int[] startEnd = {145, 243};//image pixels where the A1 pattern starts (at 124) and ends (at 214)
  int value = 0; // A
  FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
  //{1, 8, 4, 1, 1};
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
  DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, false);

  assertEquals(19, dataCharacter.getValue());
  assertEquals(1007, dataCharacter.getChecksumPortion());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
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());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
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);
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
private static void assertCorrectImage2binary(String path, String expected) throws IOException, NotFoundException {
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();

  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  int rowNumber = binaryMap.getHeight() / 2;
  BitArray row = binaryMap.getBlackRow(rowNumber, null);

  List<ExpandedPair> pairs = rssExpandedReader.decodeRow2pairs(rowNumber, row);
  BitArray binary = BitArrayBuilder.buildBitArray(pairs);
  assertEquals(expected, binary.toString());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testDecodeCheckCharacter() throws Exception {
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();

  String path = "test/data/blackbox/rssexpanded-1/3.jpg";
  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);

  int[] startEnd = {145, 243};//image pixels where the A1 pattern starts (at 124) and ends (at 214)
  int value = 0;// A
  FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
  //{1, 8, 4, 1, 1};
  DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, true);

  assertEquals(98, dataCharacter.getValue());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testDecodeDataCharacter() throws Exception {
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();

  String path = "test/data/blackbox/rssexpanded-1/3.jpg";
  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);

  int[] startEnd = {145, 243};//image pixels where the A1 pattern starts (at 124) and ends (at 214)
  int value = 0; // A
  FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
  //{1, 8, 4, 1, 1};
  DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, false);

  assertEquals(19, dataCharacter.getValue());
  assertEquals(1007, dataCharacter.getChecksumPortion());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
private static void assertCorrectImage2string(String path, String expected) throws IOException, NotFoundException {
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();

  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  int rowNumber = binaryMap.getHeight() / 2;
  BitArray row = binaryMap.getBlackRow(rowNumber, null);

  Result result = rssExpandedReader.decodeRow(rowNumber, row, null);

  assertSame(BarcodeFormat.RSS_EXPANDED, result.getBarcodeFormat());
  assertEquals(expected, result.getText());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
private static void assertCorrectImage2result(String path, ExpandedProductParsedResult expected)
    throws IOException, NotFoundException {
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();

  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  int rowNumber = binaryMap.getHeight() / 2;
  BitArray row = binaryMap.getBlackRow(rowNumber, null);

  Result theResult = rssExpandedReader.decodeRow(rowNumber, row, null);

  assertSame(BarcodeFormat.RSS_EXPANDED, theResult.getBarcodeFormat());

  ParsedResult result = ResultParser.parseResult(theResult);

  assertEquals(expected, result);
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
private static void assertCorrectImage2binary(String path, String expected) throws IOException, NotFoundException {

    File file = new File(path);
    if (!file.exists()) {
      // Support running from project root too
      file = new File("core", path);
    }

    BufferedImage image = ImageIO.read(file);
    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());
  }
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testDecodeCheckCharacter() throws Exception {

  String path = "test/data/blackbox/rssexpanded-1/3.png";
  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);

  int[] startEnd = {145, 243};//image pixels where the A1 pattern starts (at 124) and ends (at 214)
  int value = 0;// A
  FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
  //{1, 8, 4, 1, 1};
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
  DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, true);

  assertEquals(98, dataCharacter.getValue());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
@Test
public void testDecodeDataCharacter() throws Exception {

  String path = "test/data/blackbox/rssexpanded-1/3.png";
  File file = new File(path);
  if (!file.exists()) {
    // Support running from project root too
    file = new File("core", path);
  }

  BufferedImage image = ImageIO.read(file);
  BinaryBitmap binaryMap = new BinaryBitmap(new GlobalHistogramBinarizer(new BufferedImageLuminanceSource(image)));
  BitArray row = binaryMap.getBlackRow(binaryMap.getHeight() / 2, null);

  int[] startEnd = {145, 243};//image pixels where the A1 pattern starts (at 124) and ends (at 214)
  int value = 0; // A
  FinderPattern finderPatternA1 = new FinderPattern(value, startEnd, startEnd[0], startEnd[1], image.getHeight() / 2);
  //{1, 8, 4, 1, 1};
  RSSExpandedReader rssExpandedReader = new RSSExpandedReader();
  DataCharacter dataCharacter = rssExpandedReader.decodeDataCharacter(row, finderPatternA1, true, false);

  assertEquals(19, dataCharacter.getValue());
  assertEquals(1007, dataCharacter.getChecksumPortion());
}
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
private static void assertCorrectImage2string(String path, String expected) throws IOException, NotFoundException {

    File file = new File(path);
    if (!file.exists()) {
      // Support running from project root too
      file = new File("core", path);
    }

    BufferedImage image = ImageIO.read(file);
    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());
  }
 

import com.google.zxing.common.GlobalHistogramBinarizer; //导入依赖的package包/类
/**
 * 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.
 */
public static Result decodeImage(byte[] data, int width, int height) {
    // 处理
    Result result = null;
    try {
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
        hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
        hints.put(DecodeHintType.POSSIBLE_FORMATS, BarcodeFormat.QR_CODE);
        PlanarYUVLuminanceSource source =
                new PlanarYUVLuminanceSource(data, width, height, 0, 0, width, height, false);
        /**
         * HybridBinarizer算法使用了更高级的算法，但使用GlobalHistogramBinarizer识别效率确实比HybridBinarizer要高一些。
         *
         * GlobalHistogram算法：（http://kuangjianwei.blog.163.com/blog/static/190088953201361015055110/）
         *
         * 二值化的关键就是定义出黑白的界限，我们的图像已经转化为了灰度图像，每个点都是由一个灰度值来表示，就需要定义出一个灰度值，大于这个值就为白（0），低于这个值就为黑（1）。
         * 在GlobalHistogramBinarizer中，是从图像中均匀取5行（覆盖整个图像高度），每行取中间五分之四作为样本；以灰度值为X轴，每个灰度值的像素个数为Y轴建立一个直方图，
         * 从直方图中取点数最多的一个灰度值，然后再去给其他的灰度值进行分数计算，按照点数乘以与最多点数灰度值的距离的平方来进行打分，选分数最高的一个灰度值。接下来在这两个灰度值中间选取一个区分界限，
         * 取的原则是尽量靠近中间并且要点数越少越好。界限有了以后就容易了，与整幅图像的每个点进行比较，如果灰度值比界限小的就是黑，在新的矩阵中将该点置1，其余的就是白，为0。
         */
        BinaryBitmap bitmap1 = new BinaryBitmap(new GlobalHistogramBinarizer(source));
        // BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
        QRCodeReader reader2 = new QRCodeReader();
        result = reader2.decode(bitmap1, hints);
    } catch (ReaderException e) {
    }
    return result;
}