internal void Register(Pylon pylon)
{
pylon.IsGrouped = true;
PylonCount++;
GroupRange = pylon.Range;
SumPylonX += pylon.ImgX;
SumPylonY += pylon.ImgY;
}
internal bool IsDiscardedBy(Pylon adjacent)
{
if (adjacent.IsBorder)
return false;
if (adjacent.Range < this.Range)
return true;
if (adjacent.Range == this.Range && !adjacent.IsHead)
return true;
return false;
}
private unsafe void ResetPylon(Pylon pylon, byte* scan0, int stride)
{
byte range = *(scan0 + pylon.ImgY * stride + pylon.ImgX);
if (pylon.IsInsideImage(_MedianFilter.Radius, _ImgWidth, _ImgHeight)) {
range = _MedianFilter.Calculate(pylon.ImgX, pylon.ImgY, scan0, stride);
}
pylon.ResetAt(range);
}
private void DiscardTailPylon(int gridRow, int gridCol, Pylon previous)
{
Pylon current = _Grid[gridRow, gridCol];
if (!current.IsHead)
return;
Pylon adjacentE = _Grid[gridRow, gridCol + 1];
Pylon adjacentW = _Grid[gridRow, gridCol - 1];
Pylon adjacentN = _Grid[gridRow - 1, gridCol];
Pylon adjacentS = _Grid[gridRow + 1, gridCol];
bool visitedE = (previous == adjacentE) || current.IsDiscardedBy(adjacentE);
bool visitedW = (previous == adjacentW) || current.IsDiscardedBy(adjacentW);
bool visitedN = (previous == adjacentN) || current.IsDiscardedBy(adjacentN);
bool visitedS = (previous == adjacentS) || current.IsDiscardedBy(adjacentS);
if (visitedE || visitedN || visitedW || visitedS) {
current.IsHead = false;
if (!visitedE) // go E
DiscardTailPylon(gridRow, gridCol + 1, current);
if (!visitedN) // go N
DiscardTailPylon(gridRow - 1, gridCol, current);
if (!visitedW) // go W
DiscardTailPylon(gridRow, gridCol - 1, current);
if (!visitedS) // go S
DiscardTailPylon(gridRow + 1, gridCol, current);
}
}
private void PlacePylon(int gridRow, int gridCol)
{
int halfStep = _PyStep / 2;
int imgX = (gridCol * _PyStep) + halfStep;
int imgY = (gridRow * _PyStep) + halfStep;
bool isBorder = (gridRow == 0 || gridRow == _GridRows - 1 ||
gridCol == 0 || gridCol == _GridCols - 1);
Pylon pylon = new Pylon(imgX, imgY, isBorder);
_Grid[gridRow, gridCol] = pylon;
}