private void FindText(OcrData ocrData, float tolerance, FoundCharacterData previousCharacterData, List<char> foundChars)
{
foreach (CharacterDataSet characterDataSet in ocrData.TrainedCharacterDataSets)
{
List<FoundCharacterData> foundCharacterDatas = InternalFindCharacterDataSet(characterDataSet, tolerance, previousCharacterData).ToList();
if (foundCharacterDatas.Any())
{
foundChars.Add(foundCharacterDatas[0].CharacterData.Letter);
FindText(ocrData, tolerance, foundCharacterDatas[0], foundChars);
}
}
}
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;
}
