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1 // Filename : testtune.cpp
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2 // Last Change: 13-Oct-2011.
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3 //
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4
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5 #include "wx/utils.h"
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6 #include "wx/file.h"
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7 #include "wx/string.h"
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8 #include "wx/app.h"
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9 #include "wx/image.h"
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10
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11 bool IsBlack( int r, int g, int b )
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12 {
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13 if ( r == 0 && g == 0 && b == 0 ) {
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14 return true;
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15 }
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16 return false;
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17 }
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18
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19 wxString GuessHhs( wxString& file )
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20 {
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21 wxString hhs;
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22 wxImage img( file, wxBITMAP_TYPE_JPEG );
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23 int sx = 1800; // start x
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24 int sy = 315;; // start y
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25 int bw = 60; // block width
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26 int bh = 50; // block height
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27 int area = bw * bh;
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28 int black = 0;
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29 int x, y;
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30 unsigned char r, g, b;
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31
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32 int max_n;
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33 float max;
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34 float bk;
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35 for ( int c=0; c<10; c++ ) {
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36 max = 0.0;
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37 max_n = -1;
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38 for ( int n=0; n<10; n++ ) {
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39
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40 for ( x=sx+bw*c; x<sx+bw*(c+1); x++ ) {
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41 for ( y=sy+bh*n; y<sy+bh*(n+1); y++ ) {
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42 r = img.GetRed( x, y );
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43 g = img.GetGreen( x, y );
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44 b = img.GetBlue( x, y );
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45 if( IsBlack( (int)r, (int)g, (int)b ) ) black++;
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46 }
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47 }
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48
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49 bk = (float)black / area;
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50 if ( max < bk ) {
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51 max = bk;
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52 max_n = n;
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53 }
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54 //wxPuts(wxString::Format(wxT("%d %f"),n,bk));
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55 black = 0;
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56 }
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57 hhs.Append( wxString::Format( wxT("%d"), max_n ) );
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58 }
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59
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60 return hhs;
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61 }
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62
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63 bool IsMarksheet( wxString& file )
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64 {
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65 wxImage img( file, wxBITMAP_TYPE_JPEG );
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66 int black = 0;
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67 int x = 2465;
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68 int h = 3500;
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69 unsigned char r, g, b;
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70
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71 for ( int y=0; y<h; y++ ) {
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72 r = img.GetRed( x, y );
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73 g = img.GetGreen( x, y );
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74 b = img.GetBlue( x, y );
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75 if( IsBlack( (int)r, (int)g, (int)b ) ) black++;
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76 }
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77 float z = (float)black / h;
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78 float zmin = 0.095713;
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79 float zmax = 0.108600;
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80
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81 wxFile f( file );
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82 long l = f.Length();
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83 float lmin = 2072393;
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84 float lmax = 2346082;
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85
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86 wxPuts(wxString::Format(wxT("z = %f, len = %d"),z,l));
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87 if ( zmin < z && z < zmax
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88 && lmin < l && l < lmax ) {
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89 return true;
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90 }
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91 return false;
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92 }
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93
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94 int main( int argc, char **argv )
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95 {
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96 wxInitAllImageHandlers();
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97 wxString file = wxT("img999.jpg");
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98
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99 if ( IsMarksheet( file ) ) wxPuts(file+wxT(" is perhaps marksheet !"));
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100 wxString hhs = GuessHhs( file );
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101 wxPuts(hhs);
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102
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103 }
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104
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