/// <summary>
/// get score. score of 0 is perfect
/// </summary>
/// <param name="b">The b.</param>
/// <param name="l">The l.</param>
/// <returns></returns>
private int GetOffScore(Bitmap b, HistogramLetter l)
{
var bba = BitmapBoolArray.GetBitmapBoolArray(b);
var h = HistogramLetter.GetHistogram(bba, b);
var score = l.GetHistogramOffsetScore(h.Item1, h.Item2);
return(score);
}
/// <summary>
/// Initializes a new instance of the <see cref="HistogramLetter"/> class.
/// </summary>
/// <param name="b">The b.</param>
/// <param name="letter">The letter.</param>
public HistogramLetter(Bitmap b, char letter)
{
var bba = BitmapBoolArray.GetBitmapBoolArray(b);
Letter = letter;
var val = GetHistogram(bba, b);
XValues = val.Item1;
YValues = val.Item2;
}
/// <summary>
/// Gets the histogram.
/// </summary>
/// <param name="bba">The bba.</param>
/// <param name="b">The b.</param>
/// <returns></returns>
public static Tuple <int[], int[]> GetHistogram(BitmapBoolArray bba, Bitmap b)
{
var w = b.Width;
var h = b.Height;
var XValues = new int[w];
var YValues = new int[h];
for (var y = 0; y < h; y++)
{
for (var x = 0; x < w; x++)
{
var v = bba.bitmapBool[y][x] ? 1 : 0;
YValues[y] += v;
XValues[x] += v;
}
}
return(new Tuple <int[], int[]>(XValues, YValues));
}
/// <summary>
/// Gets the bitmap bool array.
/// </summary>
/// <param name="b">The b.</param>
/// <returns></returns>
public static BitmapBoolArray GetBitmapBoolArray(Bitmap b)
{
var w = b.Width;
var h = b.Height;
var bba = new BitmapBoolArray(w, h);
for (var y = 0; y < h; y++)
{
for (var x = 0; x < w; x++)
{
var p = b.GetPixel(x, y);
var white = p.R == 255 && p.G == 255 && p.B == 255;
bba.bitmapBool[y][x] = !white;
}
}
return(bba);
}
/// <summary>
/// Gets the histogram.
/// </summary>
/// <param name="bba">The bba.</param>
/// <param name="b">The b.</param>
/// <returns></returns>
public static Tuple<int[], int[]> GetHistogram(BitmapBoolArray bba, Bitmap b)
{
var w = b.Width;
var h = b.Height;
var XValues = new int[w];
var YValues = new int[h];
for (var y = 0; y < h; y++)
{
for (var x = 0; x < w; x++)
{
var v = bba.bitmapBool[y][x] ? 1 : 0;
YValues[y] += v;
XValues[x] += v;
}
}
return new Tuple<int[], int[]>(XValues, YValues);
}
/// <summary>
/// Gets the bitmap bool array.
/// </summary>
/// <param name="b">The b.</param>
/// <returns></returns>
public static BitmapBoolArray GetBitmapBoolArray(Bitmap b)
{
var w = b.Width;
var h = b.Height;
var bba = new BitmapBoolArray(w, h);
for (var y = 0; y < h; y++)
{
for (var x = 0; x < w; x++)
{
var p = b.GetPixel(x, y);
var white = p.R == 255 && p.G == 255 && p.B == 255;
bba.bitmapBool[y][x] = !white;
}
}
return bba;
}
