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

Example 86 with ResultPoint

use of com.google.zxing.ResultPoint in project android-zxing by PearceXu.

the class MonochromeRectangleDetector method detect.

/**
 * <p>Detects a rectangular region of black and white -- mostly black -- with a region of mostly
 * white, in an image.</p>
 *
 * @return {@link ResultPoint}[] describing the corners of the rectangular region. The first and
 *  last points are opposed on the diagonal, as are the second and third. The first point will be
 *  the topmost point and the last, the bottommost. The second point will be leftmost and the
 *  third, the rightmost
 * @throws NotFoundException if no Data Matrix Code can be found
 */
public ResultPoint[] detect() throws NotFoundException {
    int height = image.getHeight();
    int width = image.getWidth();
    int halfHeight = height / 2;
    int halfWidth = width / 2;
    int deltaY = Math.max(1, height / (MAX_MODULES * 8));
    int deltaX = Math.max(1, width / (MAX_MODULES * 8));
    int top = 0;
    int bottom = height;
    int left = 0;
    int right = width;
    ResultPoint pointA = findCornerFromCenter(halfWidth, 0, left, right, halfHeight, -deltaY, top, bottom, halfWidth / 2);
    top = (int) pointA.getY() - 1;
    ResultPoint pointB = findCornerFromCenter(halfWidth, -deltaX, left, right, halfHeight, 0, top, bottom, halfHeight / 2);
    left = (int) pointB.getX() - 1;
    ResultPoint pointC = findCornerFromCenter(halfWidth, deltaX, left, right, halfHeight, 0, top, bottom, halfHeight / 2);
    right = (int) pointC.getX() + 1;
    ResultPoint pointD = findCornerFromCenter(halfWidth, 0, left, right, halfHeight, deltaY, top, bottom, halfWidth / 2);
    bottom = (int) pointD.getY() + 1;
    // Go try to find point A again with better information -- might have been off at first.
    pointA = findCornerFromCenter(halfWidth, 0, left, right, halfHeight, -deltaY, top, bottom, halfWidth / 4);
    return new ResultPoint[] { pointA, pointB, pointC, pointD };
}

Example 87 with ResultPoint

use of com.google.zxing.ResultPoint in project android-zxing by PearceXu.

the class MonochromeRectangleDetector method findCornerFromCenter.

/**
 * Attempts to locate a corner of the barcode by scanning up, down, left or right from a center
 * point which should be within the barcode.
 *
 * @param centerX center's x component (horizontal)
 * @param deltaX same as deltaY but change in x per step instead
 * @param left minimum value of x
 * @param right maximum value of x
 * @param centerY center's y component (vertical)
 * @param deltaY change in y per step. If scanning up this is negative; down, positive;
 *  left or right, 0
 * @param top minimum value of y to search through (meaningless when di == 0)
 * @param bottom maximum value of y
 * @param maxWhiteRun maximum run of white pixels that can still be considered to be within
 *  the barcode
 * @return a {@link ResultPoint} encapsulating the corner that was found
 * @throws NotFoundException if such a point cannot be found
 */
private ResultPoint findCornerFromCenter(int centerX, int deltaX, int left, int right, int centerY, int deltaY, int top, int bottom, int maxWhiteRun) throws NotFoundException {
    int[] lastRange = null;
    for (int y = centerY, x = centerX; y < bottom && y >= top && x < right && x >= left; y += deltaY, x += deltaX) {
        int[] range;
        if (deltaX == 0) {
            // horizontal slices, up and down
            range = blackWhiteRange(y, maxWhiteRun, left, right, true);
        } else {
            // vertical slices, left and right
            range = blackWhiteRange(x, maxWhiteRun, top, bottom, false);
        }
        if (range == null) {
            if (lastRange == null) {
                throw NotFoundException.getNotFoundInstance();
            }
            // lastRange was found
            if (deltaX == 0) {
                int lastY = y - deltaY;
                if (lastRange[0] < centerX) {
                    if (lastRange[1] > centerX) {
                        // straddle, choose one or the other based on direction
                        return new ResultPoint(lastRange[deltaY > 0 ? 0 : 1], lastY);
                    }
                    return new ResultPoint(lastRange[0], lastY);
                } else {
                    return new ResultPoint(lastRange[1], lastY);
                }
            } else {
                int lastX = x - deltaX;
                if (lastRange[0] < centerY) {
                    if (lastRange[1] > centerY) {
                        return new ResultPoint(lastX, lastRange[deltaX < 0 ? 0 : 1]);
                    }
                    return new ResultPoint(lastX, lastRange[0]);
                } else {
                    return new ResultPoint(lastX, lastRange[1]);
                }
            }
        }
        lastRange = range;
    }
    throw NotFoundException.getNotFoundInstance();
}

Example 88 with ResultPoint

use of com.google.zxing.ResultPoint in project android-zxing by PearceXu.

the class WhiteRectangleDetector method getBlackPointOnSegment.

private ResultPoint getBlackPointOnSegment(float aX, float aY, float bX, float bY) {
    int dist = MathUtils.round(MathUtils.distance(aX, aY, bX, bY));
    float xStep = (bX - aX) / dist;
    float yStep = (bY - aY) / dist;
    for (int i = 0; i < dist; i++) {
        int x = MathUtils.round(aX + i * xStep);
        int y = MathUtils.round(aY + i * yStep);
        if (image.get(x, y)) {
            return new ResultPoint(x, y);
        }
    }
    return null;
}

Example 89 with ResultPoint

use of com.google.zxing.ResultPoint in project android-zxing by PearceXu.

the class WhiteRectangleDetector method detect.

/**
 * <p>
 * Detects a candidate barcode-like rectangular region within an image. It
 * starts around the center of the image, increases the size of the candidate
 * region until it finds a white rectangular region.
 * </p>
 *
 * @return {@link ResultPoint}[] describing the corners of the rectangular
 *         region. The first and last points are opposed on the diagonal, as
 *         are the second and third. The first point will be the topmost
 *         point and the last, the bottommost. The second point will be
 *         leftmost and the third, the rightmost
 * @throws NotFoundException if no Data Matrix Code can be found
 */
public ResultPoint[] detect() throws NotFoundException {
    int left = leftInit;
    int right = rightInit;
    int up = upInit;
    int down = downInit;
    boolean sizeExceeded = false;
    boolean aBlackPointFoundOnBorder = true;
    boolean atLeastOneBlackPointFoundOnBorder = false;
    boolean atLeastOneBlackPointFoundOnRight = false;
    boolean atLeastOneBlackPointFoundOnBottom = false;
    boolean atLeastOneBlackPointFoundOnLeft = false;
    boolean atLeastOneBlackPointFoundOnTop = false;
    while (aBlackPointFoundOnBorder) {
        aBlackPointFoundOnBorder = false;
        // .....
        // .   |
        // .....
        boolean rightBorderNotWhite = true;
        while ((rightBorderNotWhite || !atLeastOneBlackPointFoundOnRight) && right < width) {
            rightBorderNotWhite = containsBlackPoint(up, down, right, false);
            if (rightBorderNotWhite) {
                right++;
                aBlackPointFoundOnBorder = true;
                atLeastOneBlackPointFoundOnRight = true;
            } else if (!atLeastOneBlackPointFoundOnRight) {
                right++;
            }
        }
        if (right >= width) {
            sizeExceeded = true;
            break;
        }
        // .....
        // .   .
        // .___.
        boolean bottomBorderNotWhite = true;
        while ((bottomBorderNotWhite || !atLeastOneBlackPointFoundOnBottom) && down < height) {
            bottomBorderNotWhite = containsBlackPoint(left, right, down, true);
            if (bottomBorderNotWhite) {
                down++;
                aBlackPointFoundOnBorder = true;
                atLeastOneBlackPointFoundOnBottom = true;
            } else if (!atLeastOneBlackPointFoundOnBottom) {
                down++;
            }
        }
        if (down >= height) {
            sizeExceeded = true;
            break;
        }
        // .....
        // |   .
        // .....
        boolean leftBorderNotWhite = true;
        while ((leftBorderNotWhite || !atLeastOneBlackPointFoundOnLeft) && left >= 0) {
            leftBorderNotWhite = containsBlackPoint(up, down, left, false);
            if (leftBorderNotWhite) {
                left--;
                aBlackPointFoundOnBorder = true;
                atLeastOneBlackPointFoundOnLeft = true;
            } else if (!atLeastOneBlackPointFoundOnLeft) {
                left--;
            }
        }
        if (left < 0) {
            sizeExceeded = true;
            break;
        }
        // .___.
        // .   .
        // .....
        boolean topBorderNotWhite = true;
        while ((topBorderNotWhite || !atLeastOneBlackPointFoundOnTop) && up >= 0) {
            topBorderNotWhite = containsBlackPoint(left, right, up, true);
            if (topBorderNotWhite) {
                up--;
                aBlackPointFoundOnBorder = true;
                atLeastOneBlackPointFoundOnTop = true;
            } else if (!atLeastOneBlackPointFoundOnTop) {
                up--;
            }
        }
        if (up < 0) {
            sizeExceeded = true;
            break;
        }
        if (aBlackPointFoundOnBorder) {
            atLeastOneBlackPointFoundOnBorder = true;
        }
    }
    if (!sizeExceeded && atLeastOneBlackPointFoundOnBorder) {
        int maxSize = right - left;
        ResultPoint z = null;
        for (int i = 1; z == null && i < maxSize; i++) {
            z = getBlackPointOnSegment(left, down - i, left + i, down);
        }
        if (z == null) {
            throw NotFoundException.getNotFoundInstance();
        }
        ResultPoint t = null;
        // go down right
        for (int i = 1; t == null && i < maxSize; i++) {
            t = getBlackPointOnSegment(left, up + i, left + i, up);
        }
        if (t == null) {
            throw NotFoundException.getNotFoundInstance();
        }
        ResultPoint x = null;
        // go down left
        for (int i = 1; x == null && i < maxSize; i++) {
            x = getBlackPointOnSegment(right, up + i, right - i, up);
        }
        if (x == null) {
            throw NotFoundException.getNotFoundInstance();
        }
        ResultPoint y = null;
        // go up left
        for (int i = 1; y == null && i < maxSize; i++) {
            y = getBlackPointOnSegment(right, down - i, right - i, down);
        }
        if (y == null) {
            throw NotFoundException.getNotFoundInstance();
        }
        return centerEdges(y, z, x, t);
    } else {
        throw NotFoundException.getNotFoundInstance();
    }
}

Example 90 with ResultPoint

use of com.google.zxing.ResultPoint in project android-zxing by PearceXu.

the class UPCEANExtension5Support method decodeRow.

Result decodeRow(int rowNumber, BitArray row, int[] extensionStartRange) throws NotFoundException {
    StringBuilder result = decodeRowStringBuffer;
    result.setLength(0);
    int end = decodeMiddle(row, extensionStartRange, result);
    String resultString = result.toString();
    Map<ResultMetadataType, Object> extensionData = parseExtensionString(resultString);
    Result extensionResult = new Result(resultString, null, new ResultPoint[] { new ResultPoint((extensionStartRange[0] + extensionStartRange[1]) / 2.0f, rowNumber), new ResultPoint(end, rowNumber) }, BarcodeFormat.UPC_EAN_EXTENSION);
    if (extensionData != null) {
        extensionResult.putAllMetadata(extensionData);
    }
    return extensionResult;
}