private void ReAllocate(AbcMask mask)
{
if (mask.Left.RegionNumber > mask.Top.RegionNumber)
{
int indexToRemove = mask.Left.RegionNumber;
regions[mask.Top.RegionNumber].AddRange(regions[mask.Left.RegionNumber]);
foreach (ScanInfo info in regions[mask.Left.RegionNumber])
{
info.RegionNumber = mask.Top.RegionNumber;
}
regions.Remove(indexToRemove);
mask.Current.RegionNumber = mask.Top.RegionNumber;
Move(mask.Current.RegionNumber, mask.Current);
}
else
{
int indexToRemove = mask.Top.RegionNumber;
regions[mask.Left.RegionNumber].AddRange(regions[mask.Top.RegionNumber]);
foreach (ScanInfo info in regions[mask.Top.RegionNumber])
{
info.RegionNumber = mask.Left.RegionNumber;
}
regions.Remove(indexToRemove);
mask.Current.RegionNumber = mask.Left.RegionNumber;
Move(mask.Current.RegionNumber, mask.Current);
}
}
public IDictionary <int, List <ScanInfo> > Scan(Bitmap source)
{
LockableBitmap lockableBitmap = new LockableBitmap(source);
lockableBitmap.LockBits();
LockableBitmapWrapper lockableBitmapWrapper = new LockableBitmapWrapper(lockableBitmap);
try
{
SequentialEnumerator enumerator = new SequentialEnumerator(lockableBitmapWrapper);
while (enumerator.MoveNext())
{
AbcMask mask = enumerator.Current;
if (mask.Current.Color.IsWhite())
{
if (!mask.Left.IsLabeled && !mask.Top.IsLabeled)
{
if (regions.Count > 0)
{
mask.Current.RegionNumber = regions.Keys.Max() + 1;
}
else
{
mask.Current.RegionNumber = 0;
}
AddRegionAndMove(
regionNumber: mask.Current.RegionNumber,
info: mask.Current);
}
else if (!mask.Left.IsLabeled && mask.Top.IsLabeled)
{
mask.Current.RegionNumber = mask.Top.RegionNumber;
Move(regionNumber: mask.Current.RegionNumber, info: mask.Current);
}
else if (mask.Left.IsLabeled && !mask.Top.IsLabeled)
{
mask.Current.RegionNumber = mask.Left.RegionNumber;
Move(regionNumber: mask.Current.RegionNumber, info: mask.Current);
}
else if (mask.Left.IsLabeled && mask.Top.IsLabeled)
{
if (mask.Left.RegionNumber == mask.Top.RegionNumber)
{
mask.Current.RegionNumber = mask.Left.RegionNumber;
Move(regionNumber: mask.Current.RegionNumber, info: mask.Current);
}
else
{
ReAllocate(mask);
}
}
mask.Current.IsLabeled = true;
}
}
}
finally
{
lockableBitmap.UnlockBits();
}
return(regions);
}
