public StartEndPoint[] GetLetters(int[,] clearPoints)
{
Dictionary<int, StartEndPoint> points = new Dictionary<int, StartEndPoint>();
for (int x = 0; x < storeXMax; x++)
{
for (int y = 0; y < storeYMax; y++)
{
int label = clearPoints[x, y];
if (label == 0) continue;
StartEndPoint pt;
if (!points.ContainsKey(label))
{
pt = new StartEndPoint { StartX = x, StartY = y, EndX = x, EndY = y};
points.Add(label, pt);
continue;
}
pt = points[label];
if (x < pt.StartX) pt.StartX = x; if (x > pt.EndX) pt.EndX = x;
if (y < pt.StartY) pt.StartY = y; if (y > pt.EndY) pt.EndY = y;
}
}
if (points.Count == 0) return null;
int i = 0;
StartEndPoint[] fPoints = new StartEndPoint[points.Count];
foreach (StartEndPoint se in points.Values) fPoints[i++] = se;
return fPoints.ToArray();
}
public Bitmap Clip(StartEndPoint se)
{
Rectangle cropRect = new Rectangle(se.StartPoint.X, se.StartPoint.Y,
se.EndPoint.X - se.StartPoint.X + 1, se.EndPoint.Y - se.StartPoint.Y + 1);
Bitmap target = new Bitmap(cropRect.Width, cropRect.Height);
using(Graphics g = Graphics.FromImage(target))
{
g.DrawImage(bmp, new Rectangle(0, 0, target.Width, target.Height),
cropRect,
GraphicsUnit.Pixel);
}
return target;
}
public void DrawRectangle(StartEndPoint se, Color color)
{
Rectangle drawRect = new Rectangle(se.StartPoint.X, se.StartPoint.Y,
se.EndPoint.X - se.StartPoint.X + 1, se.EndPoint.Y - se.StartPoint.Y + 1);
using (Graphics g = Graphics.FromImage(bmp))
{
g.DrawRectangle(new Pen(color), drawRect);
}
}