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

Example 6 with NotFoundException

use of com.google.zxing.NotFoundException 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 7 with NotFoundException

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

the class ByQuadrantReader method decode.

@Override
public Result decode(BinaryBitmap image, Map<DecodeHintType, ?> hints) throws NotFoundException, ChecksumException, FormatException {
    int width = image.getWidth();
    int height = image.getHeight();
    int halfWidth = width / 2;
    int halfHeight = height / 2;
    try {
        // No need to call makeAbsolute as results will be relative to original top left here
        return delegate.decode(image.crop(0, 0, halfWidth, halfHeight), hints);
    } catch (NotFoundException re) {
    // continue
    }
    try {
        Result result = delegate.decode(image.crop(halfWidth, 0, halfWidth, halfHeight), hints);
        makeAbsolute(result.getResultPoints(), halfWidth, 0);
        return result;
    } catch (NotFoundException re) {
    // continue
    }
    try {
        Result result = delegate.decode(image.crop(0, halfHeight, halfWidth, halfHeight), hints);
        makeAbsolute(result.getResultPoints(), 0, halfHeight);
        return result;
    } catch (NotFoundException re) {
    // continue
    }
    try {
        Result result = delegate.decode(image.crop(halfWidth, halfHeight, halfWidth, halfHeight), hints);
        makeAbsolute(result.getResultPoints(), halfWidth, halfHeight);
        return result;
    } catch (NotFoundException re) {
    // continue
    }
    int quarterWidth = halfWidth / 2;
    int quarterHeight = halfHeight / 2;
    BinaryBitmap center = image.crop(quarterWidth, quarterHeight, halfWidth, halfHeight);
    Result result = delegate.decode(center, hints);
    makeAbsolute(result.getResultPoints(), quarterWidth, quarterHeight);
    return result;
}

Example 8 with NotFoundException

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

the class RSSExpandedReader method checkRows.

// Try to construct a valid rows sequence
// Recursion is used to implement backtracking
private List<ExpandedPair> checkRows(List<ExpandedRow> collectedRows, int currentRow) throws NotFoundException {
    for (int i = currentRow; i < rows.size(); i++) {
        ExpandedRow row = rows.get(i);
        this.pairs.clear();
        int size = collectedRows.size();
        for (int j = 0; j < size; j++) {
            this.pairs.addAll(collectedRows.get(j).getPairs());
        }
        this.pairs.addAll(row.getPairs());
        if (!isValidSequence(this.pairs)) {
            continue;
        }
        if (checkChecksum()) {
            return this.pairs;
        }
        List<ExpandedRow> rs = new ArrayList<>();
        rs.addAll(collectedRows);
        rs.add(row);
        try {
            // Recursion: try to add more rows
            return checkRows(rs, i + 1);
        } catch (NotFoundException e) {
        // We failed, try the next candidate
        }
    }
    throw NotFoundException.getNotFoundInstance();
}

Example 9 with NotFoundException

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

the class RSSExpandedReader method retrieveNextPair.

// not private for testing
ExpandedPair retrieveNextPair(BitArray row, List<ExpandedPair> previousPairs, int rowNumber) throws NotFoundException {
    boolean isOddPattern = previousPairs.size() % 2 == 0;
    if (startFromEven) {
        isOddPattern = !isOddPattern;
    }
    FinderPattern pattern;
    boolean keepFinding = true;
    int forcedOffset = -1;
    do {
        this.findNextPair(row, previousPairs, forcedOffset);
        pattern = parseFoundFinderPattern(row, rowNumber, isOddPattern);
        if (pattern == null) {
            forcedOffset = getNextSecondBar(row, this.startEnd[0]);
        } else {
            keepFinding = false;
        }
    } while (keepFinding);
    // When stacked symbol is split over multiple rows, there's no way to guess if this pair can be last or not.
    // boolean mayBeLast = checkPairSequence(previousPairs, pattern);
    DataCharacter leftChar = this.decodeDataCharacter(row, pattern, isOddPattern, true);
    if (!previousPairs.isEmpty() && previousPairs.get(previousPairs.size() - 1).mustBeLast()) {
        throw NotFoundException.getNotFoundInstance();
    }
    DataCharacter rightChar;
    try {
        rightChar = this.decodeDataCharacter(row, pattern, isOddPattern, false);
    } catch (NotFoundException ignored) {
        rightChar = null;
    }
    boolean mayBeLast = true;
    return new ExpandedPair(leftChar, rightChar, pattern, mayBeLast);
}

Example 10 with NotFoundException

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

the class Detector method processFinderPatternInfo.

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);
}