Engauge Digitizer 2
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GridClassifier.h
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1/******************************************************************************************************
2 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released *
3 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
4 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission. *
5 ******************************************************************************************************/
6
7#ifndef GRID_CLASSIFIER_H
8#define GRID_CLASSIFIER_H
9
10#include "ColorFilterHistogram.h"
11
12class QPixmap;
13class Transformation;
14
26class GridClassifier
27{
28public:
30 GridClassifier();
31
33 void classify (bool isGnuplot,
34 const QPixmap &originalPixmap,
35 const Transformation &transformation,
36 int &countX,
37 double &startX,
38 double &stepX,
39 int &countY,
40 double &startY,
41 double &stepY);
42
43private:
44
45 // Number of histogram bins could be so large that each bin corresponds to one pixel, but computation time may then be
46 // too slow when doing the correleations later on
47 static int NUM_PIXELS_PER_HISTOGRAM_BINS;
48
49 static int MIN_STEP_PIXELS;
50 static double PEAK_HALF_WIDTH;
51 static int BIN_START_UNSHIFTED;
52
53 int binFromCoordinate (double coord,
54 double coordMin,
55 double coordMax) const; // Inverse of coordinateFromBin
56 void classify();
57 void computeGraphCoordinateLimits (const QImage &image,
58 const Transformation &transformation,
59 double &xMin,
60 double &xMax,
61 double &yMin,
62 double &yMax);
63 double coordinateFromBin (int bin,
64 double coordMin,
65 double coordMax) const; // Inverse of binFromCoordinate
66 void copyVectorToVector (const double from [],
67 double to []) const;
68 void dumpGnuplotCoordinate (const QString &coordinateLabel,
69 double corr,
70 const double *bins,
71 double coordinateMin,
72 double coordinateMax,
73 int binStart,
74 int binStep) const;
75 void dumpGnuplotCorrelations (const QString &coordinateLabel,
76 double valueMin,
77 double valueMax,
78 const double signalA [],
79 const double signalB [],
80 const double correlationsMax []);
81 void initializeHistogramBins ();
82 void loadPicketFence (double picketFence [],
83 int binStart,
84 int binStep,
85 int count,
86 bool isCount) const;
87 void populateHistogramBins (const QImage &image,
88 const Transformation &transformation,
89 double xMin,
90 double xMax,
91 double yMin,
92 double yMax);
93 void searchCountSpace (double bins [],
94 double binStart,
95 double binStep,
96 int &countMax);
97 void searchStartStepSpace (bool isGnuplot,
98 double bins [],
99 const QString &coordinateLabel,
100 double valueMin,
101 double valueMax,
102 double &start,
103 double &step,
104 double &binStart,
105 double &binStep);
106
107 double *m_binsX;
108 double *m_binsY;
109
110 int m_numHistogramBins; // More bins improve accuracy but slow computation. Controlled by NUM_PIXELS_PER_HISTOGRAM_BINS
111};
112
113#endif // GRID_CLASSIFIER_H
GridClassifier::GridClassifier
GridClassifier()
Single constructor.
Definition GridClassifier.cpp:33
GridClassifier::classify
void classify(bool isGnuplot, const QPixmap &originalPixmap, const Transformation &transformation, int &countX, double &startX, double &stepX, int &countY, double &startY, double &stepY)
Classify the specified image, and return the most probably x and y grid settings.
Definition GridClassifier.cpp:50
Transformation
Affine transformation between screen and graph coordinates, based on digitized axis points.
Definition Transformation.h:32
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