Examples with FinderPatternInfo - com.google.zxing.qrcode.detector.FinderPatternInfo

Example 1 with FinderPatternInfo

use of com.google.zxing.qrcode.detector.FinderPatternInfo in project zxing by zxing.

the class MultiDetector method detectMulti.

public DetectorResult[] detectMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
    BitMatrix image = getImage();
    ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
    MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image, resultPointCallback);
    FinderPatternInfo[] infos = finder.findMulti(hints);
    if (infos.length == 0) {
        throw NotFoundException.getNotFoundInstance();
    }
    List<DetectorResult> result = new ArrayList<>();
    for (FinderPatternInfo info : infos) {
        try {
            result.add(processFinderPatternInfo(info));
        } catch (ReaderException e) {
        // ignore
        }
    }
    if (result.isEmpty()) {
        return EMPTY_DETECTOR_RESULTS;
    } else {
        return result.toArray(new DetectorResult[result.size()]);
    }
}

Also used : ResultPointCallback(com.google.zxing.ResultPointCallback) ArrayList(java.util.ArrayList) DetectorResult(com.google.zxing.common.DetectorResult) BitMatrix(com.google.zxing.common.BitMatrix) FinderPatternInfo(com.google.zxing.qrcode.detector.FinderPatternInfo) ReaderException(com.google.zxing.ReaderException)

Example 2 with FinderPatternInfo

use of com.google.zxing.qrcode.detector.FinderPatternInfo in project zxing by zxing.

the class MultiFinderPatternFinder method findMulti.

public FinderPatternInfo[] findMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
    boolean tryHarder = hints != null && hints.containsKey(DecodeHintType.TRY_HARDER);
    boolean pureBarcode = hints != null && hints.containsKey(DecodeHintType.PURE_BARCODE);
    BitMatrix image = getImage();
    int maxI = image.getHeight();
    int maxJ = image.getWidth();
    // We are looking for black/white/black/white/black modules in
    // 1:1:3:1:1 ratio; this tracks the number of such modules seen so far
    // Let's assume that the maximum version QR Code we support takes up 1/4 the height of the
    // image, and then account for the center being 3 modules in size. This gives the smallest
    // number of pixels the center could be, so skip this often. When trying harder, look for all
    // QR versions regardless of how dense they are.
    int iSkip = (int) (maxI / (MAX_MODULES * 4.0f) * 3);
    if (iSkip < MIN_SKIP || tryHarder) {
        iSkip = MIN_SKIP;
    }
    int[] stateCount = new int[5];
    for (int i = iSkip - 1; i < maxI; i += iSkip) {
        // Get a row of black/white values
        stateCount[0] = 0;
        stateCount[1] = 0;
        stateCount[2] = 0;
        stateCount[3] = 0;
        stateCount[4] = 0;
        int currentState = 0;
        for (int j = 0; j < maxJ; j++) {
            if (image.get(j, i)) {
                // Black pixel
                if ((currentState & 1) == 1) {
                    // Counting white pixels
                    currentState++;
                }
                stateCount[currentState]++;
            } else {
                // White pixel
                if ((currentState & 1) == 0) {
                    // Counting black pixels
                    if (currentState == 4) {
                        // A winner?
                        if (foundPatternCross(stateCount) && handlePossibleCenter(stateCount, i, j, pureBarcode)) {
                            // Yes
                            // Clear state to start looking again
                            currentState = 0;
                            stateCount[0] = 0;
                            stateCount[1] = 0;
                            stateCount[2] = 0;
                            stateCount[3] = 0;
                            stateCount[4] = 0;
                        } else {
                            // No, shift counts back by two
                            stateCount[0] = stateCount[2];
                            stateCount[1] = stateCount[3];
                            stateCount[2] = stateCount[4];
                            stateCount[3] = 1;
                            stateCount[4] = 0;
                            currentState = 3;
                        }
                    } else {
                        stateCount[++currentState]++;
                    }
                } else {
                    // Counting white pixels
                    stateCount[currentState]++;
                }
            }
        }
        if (foundPatternCross(stateCount)) {
            handlePossibleCenter(stateCount, i, maxJ, pureBarcode);
        }
    // end if foundPatternCross
    }
    // for i=iSkip-1 ...
    FinderPattern[][] patternInfo = selectMutipleBestPatterns();
    List<FinderPatternInfo> result = new ArrayList<>();
    for (FinderPattern[] pattern : patternInfo) {
        ResultPoint.orderBestPatterns(pattern);
        result.add(new FinderPatternInfo(pattern));
    }
    if (result.isEmpty()) {
        return EMPTY_RESULT_ARRAY;
    } else {
        return result.toArray(new FinderPatternInfo[result.size()]);
    }
}

Also used : FinderPattern(com.google.zxing.qrcode.detector.FinderPattern) ArrayList(java.util.ArrayList) BitMatrix(com.google.zxing.common.BitMatrix) FinderPatternInfo(com.google.zxing.qrcode.detector.FinderPatternInfo) ResultPoint(com.google.zxing.ResultPoint)

Example 3 with FinderPatternInfo

use of com.google.zxing.qrcode.detector.FinderPatternInfo in project weex-example by KalicyZhou.

the class MultiDetector method detectMulti.

public DetectorResult[] detectMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
    BitMatrix image = getImage();
    ResultPointCallback resultPointCallback = hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
    MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image, resultPointCallback);
    FinderPatternInfo[] infos = finder.findMulti(hints);
    if (infos.length == 0) {
        throw NotFoundException.getNotFoundInstance();
    }
    List<DetectorResult> result = new ArrayList<>();
    for (FinderPatternInfo info : infos) {
        try {
            result.add(processFinderPatternInfo(info));
        } catch (ReaderException e) {
        // ignore
        }
    }
    if (result.isEmpty()) {
        return EMPTY_DETECTOR_RESULTS;
    } else {
        return result.toArray(new DetectorResult[result.size()]);
    }
}

Example 4 with FinderPatternInfo

use of com.google.zxing.qrcode.detector.FinderPatternInfo in project weex-example by KalicyZhou.

the class MultiFinderPatternFinder method findMulti.

public FinderPatternInfo[] findMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
    boolean tryHarder = hints != null && hints.containsKey(DecodeHintType.TRY_HARDER);
    boolean pureBarcode = hints != null && hints.containsKey(DecodeHintType.PURE_BARCODE);
    BitMatrix image = getImage();
    int maxI = image.getHeight();
    int maxJ = image.getWidth();
    // We are looking for black/white/black/white/black modules in
    // 1:1:3:1:1 ratio; this tracks the number of such modules seen so far
    // Let's assume that the maximum version QR Code we support takes up 1/4 the height of the
    // image, and then account for the center being 3 modules in size. This gives the smallest
    // number of pixels the center could be, so skip this often. When trying harder, look for all
    // QR versions regardless of how dense they are.
    int iSkip = (int) (maxI / (MAX_MODULES * 4.0f) * 3);
    if (iSkip < MIN_SKIP || tryHarder) {
        iSkip = MIN_SKIP;
    }
    int[] stateCount = new int[5];
    for (int i = iSkip - 1; i < maxI; i += iSkip) {
        // Get a row of black/white values
        stateCount[0] = 0;
        stateCount[1] = 0;
        stateCount[2] = 0;
        stateCount[3] = 0;
        stateCount[4] = 0;
        int currentState = 0;
        for (int j = 0; j < maxJ; j++) {
            if (image.get(j, i)) {
                // Black pixel
                if ((currentState & 1) == 1) {
                    // Counting white pixels
                    currentState++;
                }
                stateCount[currentState]++;
            } else {
                // White pixel
                if ((currentState & 1) == 0) {
                    // Counting black pixels
                    if (currentState == 4) {
                        // A winner?
                        if (foundPatternCross(stateCount) && handlePossibleCenter(stateCount, i, j, pureBarcode)) {
                            // Yes
                            // Clear state to start looking again
                            currentState = 0;
                            stateCount[0] = 0;
                            stateCount[1] = 0;
                            stateCount[2] = 0;
                            stateCount[3] = 0;
                            stateCount[4] = 0;
                        } else {
                            // No, shift counts back by two
                            stateCount[0] = stateCount[2];
                            stateCount[1] = stateCount[3];
                            stateCount[2] = stateCount[4];
                            stateCount[3] = 1;
                            stateCount[4] = 0;
                            currentState = 3;
                        }
                    } else {
                        stateCount[++currentState]++;
                    }
                } else {
                    // Counting white pixels
                    stateCount[currentState]++;
                }
            }
        }
        if (foundPatternCross(stateCount)) {
            handlePossibleCenter(stateCount, i, maxJ, pureBarcode);
        }
    // end if foundPatternCross
    }
    // for i=iSkip-1 ...
    FinderPattern[][] patternInfo = selectMutipleBestPatterns();
    List<FinderPatternInfo> result = new ArrayList<>();
    for (FinderPattern[] pattern : patternInfo) {
        ResultPoint.orderBestPatterns(pattern);
        result.add(new FinderPatternInfo(pattern));
    }
    if (result.isEmpty()) {
        return EMPTY_RESULT_ARRAY;
    } else {
        return result.toArray(new FinderPatternInfo[result.size()]);
    }
}

Example 5 with FinderPatternInfo

use of com.google.zxing.qrcode.detector.FinderPatternInfo in project incubator-weex by apache.

the class MultiFinderPatternFinder method findMulti.

public FinderPatternInfo[] findMulti(Map<DecodeHintType, ?> hints) throws NotFoundException {
    boolean tryHarder = hints != null && hints.containsKey(DecodeHintType.TRY_HARDER);
    boolean pureBarcode = hints != null && hints.containsKey(DecodeHintType.PURE_BARCODE);
    BitMatrix image = getImage();
    int maxI = image.getHeight();
    int maxJ = image.getWidth();
    // We are looking for black/white/black/white/black modules in
    // 1:1:3:1:1 ratio; this tracks the number of such modules seen so far
    // Let's assume that the maximum version QR Code we support takes up 1/4 the height of the
    // image, and then account for the center being 3 modules in size. This gives the smallest
    // number of pixels the center could be, so skip this often. When trying harder, look for all
    // QR versions regardless of how dense they are.
    int iSkip = (int) (maxI / (MAX_MODULES * 4.0f) * 3);
    if (iSkip < MIN_SKIP || tryHarder) {
        iSkip = MIN_SKIP;
    }
    int[] stateCount = new int[5];
    for (int i = iSkip - 1; i < maxI; i += iSkip) {
        // Get a row of black/white values
        stateCount[0] = 0;
        stateCount[1] = 0;
        stateCount[2] = 0;
        stateCount[3] = 0;
        stateCount[4] = 0;
        int currentState = 0;
        for (int j = 0; j < maxJ; j++) {
            if (image.get(j, i)) {
                // Black pixel
                if ((currentState & 1) == 1) {
                    // Counting white pixels
                    currentState++;
                }
                stateCount[currentState]++;
            } else {
                // White pixel
                if ((currentState & 1) == 0) {
                    // Counting black pixels
                    if (currentState == 4) {
                        // A winner?
                        if (foundPatternCross(stateCount) && handlePossibleCenter(stateCount, i, j, pureBarcode)) {
                            // Yes
                            // Clear state to start looking again
                            currentState = 0;
                            stateCount[0] = 0;
                            stateCount[1] = 0;
                            stateCount[2] = 0;
                            stateCount[3] = 0;
                            stateCount[4] = 0;
                        } else {
                            // No, shift counts back by two
                            stateCount[0] = stateCount[2];
                            stateCount[1] = stateCount[3];
                            stateCount[2] = stateCount[4];
                            stateCount[3] = 1;
                            stateCount[4] = 0;
                            currentState = 3;
                        }
                    } else {
                        stateCount[++currentState]++;
                    }
                } else {
                    // Counting white pixels
                    stateCount[currentState]++;
                }
            }
        }
        if (foundPatternCross(stateCount)) {
            handlePossibleCenter(stateCount, i, maxJ, pureBarcode);
        }
    // end if foundPatternCross
    }
    // for i=iSkip-1 ...
    FinderPattern[][] patternInfo = selectMutipleBestPatterns();
    List<FinderPatternInfo> result = new ArrayList<>();
    for (FinderPattern[] pattern : patternInfo) {
        ResultPoint.orderBestPatterns(pattern);
        result.add(new FinderPatternInfo(pattern));
    }
    if (result.isEmpty()) {
        return EMPTY_RESULT_ARRAY;
    } else {
        return result.toArray(new FinderPatternInfo[result.size()]);
    }
}

Aggregations

FinderPatternInfo (com.google.zxing.qrcode.detector.FinderPatternInfo)12 ArrayList (java.util.ArrayList)12 ResultPoint (com.google.zxing.ResultPoint)8 BitMatrix (com.google.zxing.common.BitMatrix)8 FinderPattern (com.google.zxing.qrcode.detector.FinderPattern)8 ReaderException (com.google.zxing.ReaderException)4 ResultPointCallback (com.google.zxing.ResultPointCallback)4 DetectorResult (com.google.zxing.common.DetectorResult)4