static CharacterDataSet()
{
CharacterDataSet space = new CharacterDataSet(' ');
space.CharacterDatas.Add(new CharacterData(' ', new Bitmap(3, 8)));
SpaceCharacterDataSet = space;
}
private IEnumerable<FoundCharacterData> InternalFindCharacterDataSet(CharacterDataSet characterDataSet, float tolerance, FoundCharacterData previousCharacterData = null)
{
int startX = 0;
int startY = 0;
int maxX = neighborDifferences.GetLength(1);
int maxY = neighborDifferences.GetLength(0);
if (previousCharacterData != null)
{
startY = Math.Max(0, previousCharacterData.Point.Y + previousCharacterData.CharacterData.HeightFromWritingLine - characterDataSet.MaxHeight);
startX = Math.Min(bitmap.Width, previousCharacterData.Point.X + previousCharacterData.CharacterData.Width - 2);
maxX = startX + characterDataSet.MaxWidth+3;
maxY = startY + characterDataSet.MaxHeight * 2;
}
List<FoundCharacterData> foundCharacterDatas = new List<FoundCharacterData>();
for (int y = startY; y < maxY; y++)
{
for (int x = startX; x < maxX; x++)
{
CharacterData characterData = CharacterMatchAtPoint(x, y, characterDataSet, tolerance);
if (characterData != null)
{
FoundCharacterData foundCharacterData = new FoundCharacterData
{
Point = new Point(x, y),
CharacterData = characterData
};
if(!foundCharacterDatas.Any(f => f.Bounds.IntersectsWith(foundCharacterData.Bounds)))
yield return foundCharacterData;
}
}
}
}
private FoundCharacterData FindCharacterDataSet(CharacterDataSet characterDataSet, float tolerance, FoundCharacterData previousCharacterData)
{
int startY = Math.Max(0, previousCharacterData.Point.Y + previousCharacterData.CharacterData.HeightFromWritingLine - characterDataSet.MaxHeight - 2);
int startX = Math.Min(bitmap.Width, previousCharacterData.Point.X + previousCharacterData.CharacterData.Width - 2);
int maxX = startX + characterDataSet.MaxWidth+3;
int maxY = startY + characterDataSet.MaxHeight * 2;
for (int y = startY; y < maxY; y++)
{
for (int x = startX; x < maxX; x++)
{
CharacterData characterData = CharacterMatchAtPoint(x, y, characterDataSet, tolerance);
if (characterData != null)
{
return new FoundCharacterData
{
Point = new Point(x, y),
CharacterData = characterData
};
}
}
}
return null;
}
private CharacterData CharacterMatchAtPoint(int x, int y, CharacterDataSet characterDataSet, float tolerance)
{
if (characterDataSet == CharacterDataSet.SpaceCharacterDataSet)
{
return CharacterDataSet.SpaceCharacterDataSet.CharacterDatas[0];
}
foreach (CharacterData characterData in characterDataSet.CharacterDatas)
{
if (IsCharacterMatchAtPoint(x, y, neighborDifferences, characterData, tolerance))
{
return characterData;
}
}
return null;
}
public IEnumerable<FoundTextData> FindCharacterDataSet(CharacterDataSet characterDataSet, float tolerance)
{
return InternalFindCharacterDataSet(characterDataSet, tolerance)
.Select(f =>
{
return new FoundTextData
{
Bounds = new Rectangle(f.Point, new Size(f.CharacterData.Width, f.CharacterData.Height)),
Text = characterDataSet.Letter.ToString()
};
});
}