Examples with ResultPoint com.google.zxing.ResultPoint used on opensource projects

Example 26 with ResultPoint

use of com.google.zxing.ResultPoint in project weex-example by KalicyZhou.

the class Detector method extractParameters.

/**
   * Extracts the number of data layers and data blocks from the layer around the bull's eye.
   *
   * @param bullsEyeCorners the array of bull's eye corners
   * @throws NotFoundException in case of too many errors or invalid parameters
   */
private void extractParameters(ResultPoint[] bullsEyeCorners) throws NotFoundException {
    if (!isValid(bullsEyeCorners[0]) || !isValid(bullsEyeCorners[1]) || !isValid(bullsEyeCorners[2]) || !isValid(bullsEyeCorners[3])) {
        throw NotFoundException.getNotFoundInstance();
    }
    int length = 2 * nbCenterLayers;
    // Get the bits around the bull's eye
    int[] sides = { // Right side
    sampleLine(bullsEyeCorners[0], bullsEyeCorners[1], length), // Bottom 
    sampleLine(bullsEyeCorners[1], bullsEyeCorners[2], length), // Left side
    sampleLine(bullsEyeCorners[2], bullsEyeCorners[3], length), // Top 
    sampleLine(bullsEyeCorners[3], bullsEyeCorners[0], length) };
    // bullsEyeCorners[shift] is the corner of the bulls'eye that has three 
    // orientation marks.  
    // sides[shift] is the row/column that goes from the corner with three
    // orientation marks to the corner with two.
    shift = getRotation(sides, length);
    // Flatten the parameter bits into a single 28- or 40-bit long
    long parameterData = 0;
    for (int i = 0; i < 4; i++) {
        int side = sides[(shift + i) % 4];
        if (compact) {
            // Each side of the form ..XXXXXXX. where Xs are parameter data
            parameterData <<= 7;
            parameterData += (side >> 1) & 0x7F;
        } else {
            // Each side of the form ..XXXXX.XXXXX. where Xs are parameter data
            parameterData <<= 10;
            parameterData += ((side >> 2) & (0x1f << 5)) + ((side >> 1) & 0x1F);
        }
    }
    // Corrects parameter data using RS.  Returns just the data portion
    // without the error correction.
    int correctedData = getCorrectedParameterData(parameterData, compact);
    if (compact) {
        // 8 bits:  2 bits layers and 6 bits data blocks
        nbLayers = (correctedData >> 6) + 1;
        nbDataBlocks = (correctedData & 0x3F) + 1;
    } else {
        // 16 bits:  5 bits layers and 11 bits data blocks
        nbLayers = (correctedData >> 11) + 1;
        nbDataBlocks = (correctedData & 0x7FF) + 1;
    }
}

Example 27 with ResultPoint

use of com.google.zxing.ResultPoint in project weex-example by KalicyZhou.

the class Detector method getMatrixCenter.

/**
   * Finds a candidate center point of an Aztec code from an image
   *
   * @return the center point
   */
private Point getMatrixCenter() {
    ResultPoint pointA;
    ResultPoint pointB;
    ResultPoint pointC;
    ResultPoint pointD;
    //Get a white rectangle that can be the border of the matrix in center bull's eye or
    try {
        ResultPoint[] cornerPoints = new WhiteRectangleDetector(image).detect();
        pointA = cornerPoints[0];
        pointB = cornerPoints[1];
        pointC = cornerPoints[2];
        pointD = cornerPoints[3];
    } catch (NotFoundException e) {
        // This exception can be in case the initial rectangle is white
        // In that case, surely in the bull's eye, we try to expand the rectangle.
        int cx = image.getWidth() / 2;
        int cy = image.getHeight() / 2;
        pointA = getFirstDifferent(new Point(cx + 7, cy - 7), false, 1, -1).toResultPoint();
        pointB = getFirstDifferent(new Point(cx + 7, cy + 7), false, 1, 1).toResultPoint();
        pointC = getFirstDifferent(new Point(cx - 7, cy + 7), false, -1, 1).toResultPoint();
        pointD = getFirstDifferent(new Point(cx - 7, cy - 7), false, -1, -1).toResultPoint();
    }
    //Compute the center of the rectangle
    int cx = MathUtils.round((pointA.getX() + pointD.getX() + pointB.getX() + pointC.getX()) / 4.0f);
    int cy = MathUtils.round((pointA.getY() + pointD.getY() + pointB.getY() + pointC.getY()) / 4.0f);
    // in order to compute a more accurate center.
    try {
        ResultPoint[] cornerPoints = new WhiteRectangleDetector(image, 15, cx, cy).detect();
        pointA = cornerPoints[0];
        pointB = cornerPoints[1];
        pointC = cornerPoints[2];
        pointD = cornerPoints[3];
    } catch (NotFoundException e) {
        // This exception can be in case the initial rectangle is white
        // In that case we try to expand the rectangle.
        pointA = getFirstDifferent(new Point(cx + 7, cy - 7), false, 1, -1).toResultPoint();
        pointB = getFirstDifferent(new Point(cx + 7, cy + 7), false, 1, 1).toResultPoint();
        pointC = getFirstDifferent(new Point(cx - 7, cy + 7), false, -1, 1).toResultPoint();
        pointD = getFirstDifferent(new Point(cx - 7, cy - 7), false, -1, -1).toResultPoint();
    }
    // Recompute the center of the rectangle
    cx = MathUtils.round((pointA.getX() + pointD.getX() + pointB.getX() + pointC.getX()) / 4.0f);
    cy = MathUtils.round((pointA.getY() + pointD.getY() + pointB.getY() + pointC.getY()) / 4.0f);
    return new Point(cx, cy);
}

Example 28 with ResultPoint

use of com.google.zxing.ResultPoint in project weex-example by KalicyZhou.

the class CaptureActivity method drawResultPoints.

/**
	 * Superimpose a line for 1D or dots for 2D to highlight the key features of
	 * the barcode.
	 * 
	 * @param barcode
	 *            A bitmap of the captured image.
	 * @param scaleFactor
	 *            amount by which thumbnail was scaled
	 * @param rawResult
	 *            The decoded results which contains the points to draw.
	 */
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
        Canvas canvas = new Canvas(barcode);
        Paint paint = new Paint();
        paint.setColor(getResources().getColor(R.color.result_points));
        if (points.length == 2) {
            paint.setStrokeWidth(4.0f);
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
        } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
            // Hacky special case -- draw two lines, for the barcode and
            // metadata
            drawLine(canvas, paint, points[0], points[1], scaleFactor);
            drawLine(canvas, paint, points[2], points[3], scaleFactor);
        } else {
            paint.setStrokeWidth(10.0f);
            for (ResultPoint point : points) {
                if (point != null) {
                    canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
                }
            }
        }
    }
}

Example 29 with ResultPoint

use of com.google.zxing.ResultPoint in project weex-example by KalicyZhou.

the class Detector method detect.

/**
   * Detects an Aztec Code in an image.
   *
   * @param isMirror if true, image is a mirror-image of original
   * @return {@link AztecDetectorResult} encapsulating results of detecting an Aztec Code
   * @throws NotFoundException if no Aztec Code can be found
   */
public AztecDetectorResult detect(boolean isMirror) throws NotFoundException {
    // 1. Get the center of the aztec matrix
    Point pCenter = getMatrixCenter();
    // 2. Get the center points of the four diagonal points just outside the bull's eye
    //  [topRight, bottomRight, bottomLeft, topLeft]
    ResultPoint[] bullsEyeCorners = getBullsEyeCorners(pCenter);
    if (isMirror) {
        ResultPoint temp = bullsEyeCorners[0];
        bullsEyeCorners[0] = bullsEyeCorners[2];
        bullsEyeCorners[2] = temp;
    }
    // 3. Get the size of the matrix and other parameters from the bull's eye
    extractParameters(bullsEyeCorners);
    // 4. Sample the grid
    BitMatrix bits = sampleGrid(image, bullsEyeCorners[shift % 4], bullsEyeCorners[(shift + 1) % 4], bullsEyeCorners[(shift + 2) % 4], bullsEyeCorners[(shift + 3) % 4]);
    // 5. Get the corners of the matrix.
    ResultPoint[] corners = getMatrixCornerPoints(bullsEyeCorners);
    return new AztecDetectorResult(bits, corners, compact, nbDataBlocks, nbLayers);
}

Example 30 with ResultPoint

use of com.google.zxing.ResultPoint in project weex-example by KalicyZhou.

the class GenericMultipleBarcodeReader method doDecodeMultiple.

private void doDecodeMultiple(BinaryBitmap image, Map<DecodeHintType, ?> hints, List<Result> results, int xOffset, int yOffset, int currentDepth) {
    if (currentDepth > MAX_DEPTH) {
        return;
    }
    Result result;
    try {
        result = delegate.decode(image, hints);
    } catch (ReaderException ignored) {
        return;
    }
    boolean alreadyFound = false;
    for (Result existingResult : results) {
        if (existingResult.getText().equals(result.getText())) {
            alreadyFound = true;
            break;
        }
    }
    if (!alreadyFound) {
        results.add(translateResultPoints(result, xOffset, yOffset));
    }
    ResultPoint[] resultPoints = result.getResultPoints();
    if (resultPoints == null || resultPoints.length == 0) {
        return;
    }
    int width = image.getWidth();
    int height = image.getHeight();
    float minX = width;
    float minY = height;
    float maxX = 0.0f;
    float maxY = 0.0f;
    for (ResultPoint point : resultPoints) {
        if (point == null) {
            continue;
        }
        float x = point.getX();
        float y = point.getY();
        if (x < minX) {
            minX = x;
        }
        if (y < minY) {
            minY = y;
        }
        if (x > maxX) {
            maxX = x;
        }
        if (y > maxY) {
            maxY = y;
        }
    }
    // Decode left of barcode
    if (minX > MIN_DIMENSION_TO_RECUR) {
        doDecodeMultiple(image.crop(0, 0, (int) minX, height), hints, results, xOffset, yOffset, currentDepth + 1);
    }
    // Decode above barcode
    if (minY > MIN_DIMENSION_TO_RECUR) {
        doDecodeMultiple(image.crop(0, 0, width, (int) minY), hints, results, xOffset, yOffset, currentDepth + 1);
    }
    // Decode right of barcode
    if (maxX < width - MIN_DIMENSION_TO_RECUR) {
        doDecodeMultiple(image.crop((int) maxX, 0, width - (int) maxX, height), hints, results, xOffset + (int) maxX, yOffset, currentDepth + 1);
    }
    // Decode below barcode
    if (maxY < height - MIN_DIMENSION_TO_RECUR) {
        doDecodeMultiple(image.crop(0, (int) maxY, width, height - (int) maxY), hints, results, xOffset, yOffset + (int) maxY, currentDepth + 1);
    }
}