Java Code Examples for com.google.zxing.qrcode.decoder.Version#getAlignmentPatternCenters()

The following examples show how to use com.google.zxing.qrcode.decoder.Version#getAlignmentPatternCenters() . 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: Detector.java From ScreenCapture with MIT License

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 2

Source File: Detector.java From Tesseract-OCR-Scanner with Apache License 2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 3

Source File: Detector.java From QrCodeScanner with GNU General Public License v3.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 4

Source File: Detector.java From ZXing-Orient with Apache License 2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / (float) modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            (float) i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 5

Source File: Detector.java From analyzer-of-android-for-Apache-Weex with Apache License 2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / (float) modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            (float) i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 6

Source File: Detector.java From weex with Apache License 2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / (float) modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            (float) i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 7

Source File: Detector.java From barcodescanner-lib-aar with MIT License

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 8

Source File: Detector.java From reacteu-app with MIT License

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / (float) modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            (float) i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 9

Source File: Detector.java From RipplePower with Apache License 2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
		throws NotFoundException, FormatException {

	FinderPattern topLeft = info.getTopLeft();
	FinderPattern topRight = info.getTopRight();
	FinderPattern bottomLeft = info.getBottomLeft();

	float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
	if (moduleSize < 1.0f) {
		throw NotFoundException.getNotFoundInstance();
	}
	int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
	Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
	int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

	AlignmentPattern alignmentPattern = null;
	// Anything above version 1 has an alignment pattern
	if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

		// Guess where a "bottom right" finder pattern would have been
		float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
		float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

		// Estimate that alignment pattern is closer by 3 modules
		// from "bottom right" to known top left location
		float correctionToTopLeft = 1.0f - 3.0f / (float) modulesBetweenFPCenters;
		int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
		int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

		// Kind of arbitrary -- expand search radius before giving up
		for (int i = 4; i <= 16; i <<= 1) {
			try {
				alignmentPattern = findAlignmentInRegion(moduleSize, estAlignmentX, estAlignmentY, (float) i);
				break;
			} catch (NotFoundException re) {
				// try next round
			}
		}
		// If we didn't find alignment pattern... well try anyway without it
	}

	PerspectiveTransform transform = createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

	BitMatrix bits = sampleGrid(image, transform, dimension);

	ResultPoint[] points;
	if (alignmentPattern == null) {
		points = new ResultPoint[] { bottomLeft, topLeft, topRight };
	} else {
		points = new ResultPoint[] { bottomLeft, topLeft, topRight, alignmentPattern };
	}
	return new DetectorResult(bits, points);
}

Example 10

Source File: Detector.java From Telegram-FOSS with GNU General Public License v2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}

Example 11

Source File: Detector.java From Telegram with GNU General Public License v2.0

4 votes

protected final DetectorResult processFinderPatternInfo(FinderPatternInfo info)
    throws NotFoundException, FormatException {

  FinderPattern topLeft = info.getTopLeft();
  FinderPattern topRight = info.getTopRight();
  FinderPattern bottomLeft = info.getBottomLeft();

  float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
  if (moduleSize < 1.0f) {
    throw NotFoundException.getNotFoundInstance();
  }
  int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
  Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
  int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;

  AlignmentPattern alignmentPattern = null;
  // Anything above version 1 has an alignment pattern
  if (provisionalVersion.getAlignmentPatternCenters().length > 0) {

    // Guess where a "bottom right" finder pattern would have been
    float bottomRightX = topRight.getX() - topLeft.getX() + bottomLeft.getX();
    float bottomRightY = topRight.getY() - topLeft.getY() + bottomLeft.getY();

    // Estimate that alignment pattern is closer by 3 modules
    // from "bottom right" to known top left location
    float correctionToTopLeft = 1.0f - 3.0f / modulesBetweenFPCenters;
    int estAlignmentX = (int) (topLeft.getX() + correctionToTopLeft * (bottomRightX - topLeft.getX()));
    int estAlignmentY = (int) (topLeft.getY() + correctionToTopLeft * (bottomRightY - topLeft.getY()));

    // Kind of arbitrary -- expand search radius before giving up
    for (int i = 4; i <= 16; i <<= 1) {
      try {
        alignmentPattern = findAlignmentInRegion(moduleSize,
            estAlignmentX,
            estAlignmentY,
            i);
        break;
      } catch (NotFoundException re) {
        // try next round
      }
    }
    // If we didn't find alignment pattern... well try anyway without it
  }

  PerspectiveTransform transform =
      createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);

  BitMatrix bits = sampleGrid(image, transform, dimension);

  ResultPoint[] points;
  if (alignmentPattern == null) {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight};
  } else {
    points = new ResultPoint[]{bottomLeft, topLeft, topRight, alignmentPattern};
  }
  return new DetectorResult(bits, points);
}