Java Code Examples for com.google.zxing.LuminanceSource#getRow()

The following examples show how to use com.google.zxing.LuminanceSource#getRow() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: GlobalHistogramBinarizer.java    From ScreenCapture with MIT License 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}
Example 2
Source File: GlobalHistogramBinarizer.java    From Tesseract-OCR-Scanner with Apache License 2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}
Example 3
Source File: GlobalHistogramBinarizer.java    From QrCodeScanner with GNU General Public License v3.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}
Example 4
Source File: GlobalHistogramBinarizer.java    From ZXing-Orient with Apache License 2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    int pixel = localLuminances[x] & 0xff;
    localBuckets[pixel >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  int left = localLuminances[0] & 0xff;
  int center = localLuminances[1] & 0xff;
  for (int x = 1; x < width - 1; x++) {
    int right = localLuminances[x + 1] & 0xff;
    // A simple -1 4 -1 box filter with a weight of 2.
    int luminance = ((center * 4) - left - right) / 2;
    if (luminance < blackPoint) {
      row.set(x);
    }
    left = center;
    center = right;
  }
  return row;
}
Example 5
Source File: GlobalHistogramBinarizer.java    From analyzer-of-android-for-Apache-Weex with Apache License 2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    int pixel = localLuminances[x] & 0xff;
    localBuckets[pixel >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  int left = localLuminances[0] & 0xff;
  int center = localLuminances[1] & 0xff;
  for (int x = 1; x < width - 1; x++) {
    int right = localLuminances[x + 1] & 0xff;
    // A simple -1 4 -1 box filter with a weight of 2.
    int luminance = ((center * 4) - left - right) / 2;
    if (luminance < blackPoint) {
      row.set(x);
    }
    left = center;
    center = right;
  }
  return row;
}
Example 6
Source File: GlobalHistogramBinarizer.java    From weex with Apache License 2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    int pixel = localLuminances[x] & 0xff;
    localBuckets[pixel >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  int left = localLuminances[0] & 0xff;
  int center = localLuminances[1] & 0xff;
  for (int x = 1; x < width - 1; x++) {
    int right = localLuminances[x + 1] & 0xff;
    // A simple -1 4 -1 box filter with a weight of 2.
    int luminance = ((center * 4) - left - right) / 2;
    if (luminance < blackPoint) {
      row.set(x);
    }
    left = center;
    center = right;
  }
  return row;
}
Example 7
Source File: GlobalHistogramBinarizer.java    From barcodescanner-lib-aar with MIT License 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}
Example 8
Source File: GlobalHistogramBinarizer.java    From reacteu-app with MIT License 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    int pixel = localLuminances[x] & 0xff;
    localBuckets[pixel >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  int left = localLuminances[0] & 0xff;
  int center = localLuminances[1] & 0xff;
  for (int x = 1; x < width - 1; x++) {
    int right = localLuminances[x + 1] & 0xff;
    // A simple -1 4 -1 box filter with a weight of 2.
    int luminance = ((center << 2) - left - right) >> 1;
    if (luminance < blackPoint) {
      row.set(x);
    }
    left = center;
    center = right;
  }
  return row;
}
Example 9
Source File: GlobalHistogramBinarizer.java    From MiBandDecompiled with Apache License 2.0 5 votes vote down vote up 
public BitMatrix getBlackMatrix()
{
    LuminanceSource luminancesource = getLuminanceSource();
    int i = luminancesource.getWidth();
    int j = luminancesource.getHeight();
    BitMatrix bitmatrix = new BitMatrix(i, j);
    a(i);
    int ai[] = e;
    for (int k = 1; k < 5; k++)
    {
        byte abyte1[] = luminancesource.getRow((j * k) / 5, d);
        int l1 = (i << 2) / 5;
        for (int i2 = i / 5; i2 < l1; i2++)
        {
            int j2 = (0xff & abyte1[i2]) >> 3;
            ai[j2] = 1 + ai[j2];
        }

    }

    int l = a(ai);
    byte abyte0[] = luminancesource.getMatrix();
    for (int i1 = 0; i1 < j; i1++)
    {
        int j1 = i1 * i;
        for (int k1 = 0; k1 < i; k1++)
        {
            if ((0xff & abyte0[j1 + k1]) < l)
            {
                bitmatrix.set(k1, i1);
            }
        }

    }

    return bitmatrix;
}
Example 10
Source File: GlobalHistogramBinarizer.java    From MiBandDecompiled with Apache License 2.0 5 votes vote down vote up 
public BitArray getBlackRow(int i, BitArray bitarray)
{
    int j = 1;
    LuminanceSource luminancesource = getLuminanceSource();
    int k = luminancesource.getWidth();
    byte abyte0[];
    int ai[];
    if (bitarray == null || bitarray.getSize() < k)
    {
        bitarray = new BitArray(k);
    } else
    {
        bitarray.clear();
    }
    a(k);
    abyte0 = luminancesource.getRow(i, d);
    ai = e;
    for (int l = 0; l < k; l++)
    {
        int j2 = (0xff & abyte0[l]) >> 3;
        ai[j2] = 1 + ai[j2];
    }

    int i1 = a(ai);
    int j1 = 0xff & abyte0[0];
    int k1 = 0xff & abyte0[j];
    int l1 = j1;
    while (j < k - 1) 
    {
        int i2 = 0xff & abyte0[j + 1];
        if ((k1 << 2) - l1 - i2 >> 1 < i1)
        {
            bitarray.set(j);
        }
        j++;
        l1 = k1;
        k1 = i2;
    }
    return bitarray;
}
Example 11
Source File: GlobalHistogramBinarizer.java    From RipplePower with Apache License 2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
	LuminanceSource source = getLuminanceSource();
	int width = source.getWidth();
	if (row == null || row.getSize() < width) {
		row = new BitArray(width);
	} else {
		row.clear();
	}

	initArrays(width);
	byte[] localLuminances = source.getRow(y, luminances);
	int[] localBuckets = buckets;
	for (int x = 0; x < width; x++) {
		int pixel = localLuminances[x] & 0xff;
		localBuckets[pixel >> LUMINANCE_SHIFT]++;
	}
	int blackPoint = estimateBlackPoint(localBuckets);

	int left = localLuminances[0] & 0xff;
	int center = localLuminances[1] & 0xff;
	for (int x = 1; x < width - 1; x++) {
		int right = localLuminances[x + 1] & 0xff;
		// A simple -1 4 -1 box filter with a weight of 2.
		int luminance = ((center * 4) - left - right) / 2;
		if (luminance < blackPoint) {
			row.set(x);
		}
		left = center;
		center = right;
	}
	return row;
}
Example 12
Source File: GlobalHistogramBinarizer.java    From Telegram-FOSS with GNU General Public License v2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}
Example 13
Source File: GlobalHistogramBinarizer.java    From Telegram with GNU General Public License v2.0 5 votes vote down vote up 
@Override
public BitArray getBlackRow(int y, BitArray row) throws NotFoundException {
  LuminanceSource source = getLuminanceSource();
  int width = source.getWidth();
  if (row == null || row.getSize() < width) {
    row = new BitArray(width);
  } else {
    row.clear();
  }

  initArrays(width);
  byte[] localLuminances = source.getRow(y, luminances);
  int[] localBuckets = buckets;
  for (int x = 0; x < width; x++) {
    localBuckets[(localLuminances[x] & 0xff) >> LUMINANCE_SHIFT]++;
  }
  int blackPoint = estimateBlackPoint(localBuckets);

  if (width < 3) {
    // Special case for very small images
    for (int x = 0; x < width; x++) {
      if ((localLuminances[x] & 0xff) < blackPoint) {
        row.set(x);
      }
    }
  } else {
    int left = localLuminances[0] & 0xff;
    int center = localLuminances[1] & 0xff;
    for (int x = 1; x < width - 1; x++) {
      int right = localLuminances[x + 1] & 0xff;
      // A simple -1 4 -1 box filter with a weight of 2.
      if (((center * 4) - left - right) / 2 < blackPoint) {
        row.set(x);
      }
      left = center;
      center = right;
    }
  }
  return row;
}