107 lines
4.3 KiB
C
107 lines
4.3 KiB
C
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#ifndef __DETECTOR_H__
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#define __DETECTOR_H__
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/*
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* Detector.h
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* zxing
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*
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* Copyright 2010 ZXing authors All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zxing/common/Point.h>
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#include <zxing/common/DetectorResult.h>
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#include <zxing/NotFoundException.h>
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#include <zxing/BinaryBitmap.h>
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#include <zxing/DecodeHints.h>
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namespace zxing {
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namespace pdf417 {
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namespace detector {
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class Detector {
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private:
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static const int INTEGER_MATH_SHIFT = 8;
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static const int PATTERN_MATCH_RESULT_SCALE_FACTOR = 1 << INTEGER_MATH_SHIFT;
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static const int MAX_AVG_VARIANCE;
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static const int MAX_INDIVIDUAL_VARIANCE;
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static const int START_PATTERN[];
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static const int START_PATTERN_LENGTH;
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static const int START_PATTERN_REVERSE[];
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static const int START_PATTERN_REVERSE_LENGTH;
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static const int STOP_PATTERN[];
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static const int STOP_PATTERN_LENGTH;
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static const int STOP_PATTERN_REVERSE[];
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static const int STOP_PATTERN_REVERSE_LENGTH;
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Ref<BinaryBitmap> image_;
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static ArrayRef< Ref<ResultPoint> > findVertices(Ref<BitMatrix> matrix, int rowStep);
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static ArrayRef< Ref<ResultPoint> > findVertices180(Ref<BitMatrix> matrix, int rowStep);
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static ArrayRef<int> findGuardPattern(Ref<BitMatrix> matrix,
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int column,
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int row,
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int width,
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bool whiteFirst,
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const int pattern[],
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int patternSize,
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ArrayRef<int>& counters);
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static int patternMatchVariance(ArrayRef<int>& counters, const int pattern[],
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int maxIndividualVariance);
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static void correctVertices(Ref<BitMatrix> matrix,
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ArrayRef< Ref<ResultPoint> >& vertices,
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bool upsideDown);
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static void findWideBarTopBottom(Ref<BitMatrix> matrix,
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ArrayRef< Ref<ResultPoint> >& vertices,
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int offsetVertice,
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int startWideBar,
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int lenWideBar,
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int lenPattern,
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int nIncrement);
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static void findCrossingPoint(ArrayRef< Ref<ResultPoint> >& vertices,
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int idxResult,
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int idxLineA1, int idxLineA2,
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int idxLineB1, int idxLineB2,
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Ref<BitMatrix>& matrix);
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static Point intersection(Line a, Line b);
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static float computeModuleWidth(ArrayRef< Ref<ResultPoint> >& vertices);
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static int computeDimension(Ref<ResultPoint> const& topLeft,
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Ref<ResultPoint> const& topRight,
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Ref<ResultPoint> const& bottomLeft,
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Ref<ResultPoint> const& bottomRight,
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float moduleWidth);
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int computeYDimension(Ref<ResultPoint> const& topLeft,
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Ref<ResultPoint> const& topRight,
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Ref<ResultPoint> const& bottomLeft,
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Ref<ResultPoint> const& bottomRight,
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float moduleWidth);
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Ref<BitMatrix> sampleLines(ArrayRef< Ref<ResultPoint> > const& vertices, int dimensionY, int dimension);
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public:
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Detector(Ref<BinaryBitmap> image);
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Ref<BinaryBitmap> getImage();
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Ref<DetectorResult> detect();
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Ref<DetectorResult> detect(DecodeHints const& hints);
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};
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}
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}
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}
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#endif // __DETECTOR_H__
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