private Dictionary<int, List<Pixel>> Find()
{
int labelCount = 1;
var allLabels = new Dictionary<int, Label>();
for (int i = 0; i < _height; i++)
{
for (int j = 0; j < _width; j++)
{
Pixel currentPixel = new Pixel(new Point(j, i), _input.GetPixel(j, i));
if (CheckIsBackGround(currentPixel))
{
continue;
}
IEnumerable<int> neighboringLabels = GetNeighboringLabels(currentPixel);
int currentLabel;
if (!neighboringLabels.Any())
{
currentLabel = labelCount;
allLabels.Add(currentLabel, new Label(currentLabel));
labelCount++;
}
else
{
currentLabel = neighboringLabels.Min(n => allLabels[n].GetRoot().Name);
Label root = allLabels[currentLabel].GetRoot();
foreach (var neighbor in neighboringLabels)
{
if (root.Name != allLabels[neighbor].GetRoot().Name)
{
allLabels[neighbor].Join(allLabels[currentLabel]);
}
}
}
_board[j, i] = currentLabel;
}
}
Dictionary<int, List<Pixel>> patterns = AggregatePatterns(allLabels);
return patterns;
}
protected virtual bool CheckIsBackGround(Pixel currentPixel)
{
return currentPixel.color.A == 255 && currentPixel.color.R == 255 && currentPixel.color.G == 255 && currentPixel.color.B == 255;
}
private IEnumerable<int> GetNeighboringLabels(Pixel pix)
{
var neighboringLabels = new List<int>();
for (int i = pix.Position.Y - 1; i <= pix.Position.Y + 2 && i < _height - 1; i++)
{
for (int j = pix.Position.X - 1; j <= pix.Position.X + 2 && j < _width - 1; j++)
{
if (i > -1 && j > -1 && _board[j, i] != 0)
{
neighboringLabels.Add(_board[j, i]);
}
}
}
return neighboringLabels;
}
private Dictionary<int, List<Pixel>> Find(int width, int height)
{
int labelCount = 1;
var allLabels = new Dictionary<int, Label>();
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
Pixel currentPixel = new Pixel(new Point(j, i), _input.GetPixel(j, i));
if (CheckIsForeGround(currentPixel))
{
HashSet<int> neighboringLabels = GetNeighboringLabels(currentPixel, width, height);
int currentLabel;
if (neighboringLabels.Count == 0)
{
currentLabel = labelCount;
allLabels.Add(currentLabel, new Label(currentLabel));
labelCount++;
}
else
{
currentLabel = neighboringLabels.Min();
var root = allLabels[currentLabel].GetRoot();
foreach (var item in neighboringLabels)
{
var root2 = allLabels[item].GetRoot();
if (root.Name != root2.Name)
{
allLabels[item].Join(allLabels[currentLabel]);
}
}
}
_board[j, i] = currentLabel;
}
}
}
Dictionary<int, List<Pixel>> patterns = AggregatePatterns(allLabels, width, height);
return patterns;
}
private int CheckDimensionType(Pixel shape, bool isWidth)
{
return isWidth ? shape.Position.X : shape.Position.Y;
}
private HashSet<int> GetNeighboringLabels(Pixel pix, int width, int height)
{
var neighboringLabels = new HashSet<int>();
int x = pix.Position.Y;
int y = pix.Position.X;
if (x > 0)//North
{
CheckCorner(neighboringLabels, x - 1, y);
if (y > 0)//North West
{
CheckCorner(neighboringLabels, x - 1, y - 1);
}
if (y < width - 1)//North East
{
CheckCorner(neighboringLabels, x - 1, y + 1);
}
}
if (y > 0)//West
{
CheckCorner(neighboringLabels, x, y - 1);
if (x < height - 1)//South West
{
CheckCorner(neighboringLabels, x + 1, y - 1);
}
}
if (y < width - 1)//East
{
CheckCorner(neighboringLabels, x, y + 1);
if (x < height - 1)//South East
{
CheckCorner(neighboringLabels, x + 1, y + 1);
}
}
return neighboringLabels;
}
