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https://github.com/kerberos-io/openalpr-base.git
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102 lines
4.1 KiB
C++
102 lines
4.1 KiB
C++
/*
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* Copyright (c) 2013 New Designs Unlimited, LLC
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* Opensource Automated License Plate Recognition [http://www.openalpr.com]
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*
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* This file is part of OpenAlpr.
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*
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* OpenAlpr is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License
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* version 3 as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPENALPR_CHARACTERSEGMENTER_H
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#define OPENALPR_CHARACTERSEGMENTER_H
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#include "opencv2/imgproc/imgproc.hpp"
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#include "constants.h"
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#include "binarize_wolf.h"
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#include "utility.h"
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#include "characterregion.h"
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#include "colorfilter.h"
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#include "verticalhistogram.h"
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#include "config.h"
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using namespace cv;
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using namespace std;
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//const float MIN_BOX_WIDTH_PX = 4; // 4 pixels
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const Scalar COLOR_DEBUG_EDGE(0,0,255); // Red
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const Scalar COLOR_DEBUG_SPECKLES(0,0,255); // Red
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const Scalar COLOR_DEBUG_MIN_HEIGHT(255,0,0); // Blue
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const Scalar COLOR_DEBUG_MIN_AREA(255,0,0); // Blue
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const Scalar COLOR_DEBUG_FULLBOX(255,255,0); // Blue-green
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const Scalar COLOR_DEBUG_COLORFILTER(255,0,255); // Magenta
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const Scalar COLOR_DEBUG_EMPTYFILTER(0,255,255); // Yellow
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class CharacterSegmenter
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{
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public:
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CharacterSegmenter(Mat img, bool invertedColors, Config* config);
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virtual ~CharacterSegmenter();
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vector<Rect> characters;
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int confidence;
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vector<Mat> getThresholds();
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private:
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Config* config;
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CharacterAnalysis* charAnalysis;
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LineSegment top;
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LineSegment bottom;
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vector<Mat> imgDbgGeneral;
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vector<Mat> imgDbgCleanStages;
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vector<bool> filter(Mat img, vector<vector<Point> > contours, vector<Vec4i> hierarchy);
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vector<bool> filterByBoxSize(vector< vector< Point> > contours, vector<bool> goodIndices, float minHeightPx, float maxHeightPx);
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vector<bool> filterBetweenLines(Mat img, vector<vector<Point> > contours, vector<Vec4i> hierarchy, vector<Point> outerPolygon, vector<bool> goodIndices);
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vector<bool> filterContourHoles(vector<vector<Point> > contours, vector<Vec4i> hierarchy, vector<bool> goodIndices);
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vector<Point> getBestVotedLines(Mat img, vector<vector<Point> > contours, vector<bool> goodIndices);
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int getGoodIndicesCount(vector<bool> goodIndices);
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Mat getCharacterMask(Mat img_threshold, vector<vector<Point> > contours, vector<Vec4i> hierarchy, vector<bool> goodIndices);
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Mat getCharBoxMask(Mat img_threshold, vector<Rect> charBoxes);
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void removeSmallContours(vector<Mat> thresholds, vector<vector<vector<Point > > > allContours, float avgCharWidth, float avgCharHeight);
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Mat getVerticalHistogram(Mat img, Mat mask);
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vector<Rect> getHistogramBoxes(VerticalHistogram histogram, float avgCharWidth, float avgCharHeight, float* score);
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vector<Rect> getBestCharBoxes(Mat img, vector<Rect> charBoxes, float avgCharWidth);
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vector<Rect> combineCloseBoxes( vector<Rect> charBoxes, float avgCharWidth);
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vector<Rect> get1DHits(Mat img, int yOffset);
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void cleanCharRegions(vector<Mat> thresholds, vector<Rect> charRegions);
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void cleanBasedOnColor(vector<Mat> thresholds, Mat colorMask, vector<Rect> charRegions);
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void cleanMostlyFullBoxes(vector<Mat> thresholds, const vector<Rect> charRegions);
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vector<Rect> filterMostlyEmptyBoxes(vector<Mat> thresholds, const vector<Rect> charRegions);
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void filterEdgeBoxes(vector<Mat> thresholds, const vector<Rect> charRegions, float avgCharWidth, float avgCharHeight);
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int getLongestBlobLengthBetweenLines(Mat img, int col);
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int isSkinnyLineInsideBox(Mat threshold, Rect box, vector<vector<Point> > contours, vector<Vec4i> hierarchy, float avgCharWidth, float avgCharHeight);
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vector<Point> getEncapsulatingLines(Mat img, vector<vector<Point> > contours, vector<bool> goodIndices);
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};
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#endif // OPENALPR_CHARACTERSEGMENTER_H
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