--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/marksheet.h	Sat Oct 15 13:24:27 2011 +0900
@@ -0,0 +1,97 @@
+// Filename   : marksheet.h
+// Last Change: 06-Oct-2011.
+//
+#ifndef __MARKSHEET__
+#define __MARKSHEET__
+
+
+#include "wx/utils.h"
+#include "wx/file.h"
+#include "wx/string.h"
+#include "wx/image.h"
+
+bool IsBlack( int r, int g, int b ) 
+{
+    if ( r == 0 && g == 0 && b == 0 ) {
+        return true;
+    }
+    return false;
+};
+
+wxString GuessHhs( wxString& file ) 
+{
+    wxString hhs;
+    wxImage img( file, wxBITMAP_TYPE_JPEG );
+    int sx = 1800;  // start x
+    int sy = 315;;  // start y
+    int bw = 60;    // block width
+    int bh = 50;    // block height
+    int area = bw * bh;
+    int black = 0;
+    int x, y;
+    unsigned char r, g, b;
+
+    int max_n;
+    float max;
+    float bk;
+    for ( int c=0; c<10; c++ ) {
+        max = 0.0;
+        max_n = -1;
+        for ( int n=0; n<10; n++ ) {
+
+            for ( x=sx+bw*c; x<sx+bw*(c+1); x++ ) {
+                for ( y=sy+bh*n; y<sy+bh*(n+1); y++ ) {
+                    r = img.GetRed(   x, y );
+                    g = img.GetGreen( x, y );
+                    b = img.GetBlue(  x, y );
+                    if( IsBlack( (int)r, (int)g, (int)b ) ) black++;
+                }
+            }
+
+            bk = (float)black / area;
+            if ( max < bk ) {
+                max = bk;
+                max_n = n;
+            }
+            //wxPuts(wxString::Format(wxT("%d %f"),n,bk));
+            black = 0;
+        }
+        hhs.Append( wxString::Format( wxT("%d"), max_n ) );
+    }
+
+    return hhs;
+};
+
+bool IsMarksheet( wxString& file )
+{
+    wxImage img( file, wxBITMAP_TYPE_JPEG );
+    int black = 0;
+    int x = 2465;
+    int h = 3500;
+    unsigned char r, g, b;
+
+    for ( int y=0; y<h; y++ ) {
+        r = img.GetRed(   x, y );
+        g = img.GetGreen( x, y );
+        b = img.GetBlue(  x, y );
+        if( IsBlack( (int)r, (int)g, (int)b ) ) black++;
+    }
+    float z = (float)black / h;
+    float zmin = 0.095713;
+    float zmax = 0.108600;
+
+    wxFile f( file );
+    long l = f.Length();
+    float lmin = 2072393;
+    float lmax = 2346082;
+
+    //wxPuts(wxString::Format(wxT("z = %f, len = %d"),z,len));
+    if ( zmin < z && z < zmax
+      && lmin < l && l < lmax ) {
+        return true;
+    }
+    return false;
+};
+
+#endif // __MARKSHEET__
+