/// <summary> Looks for the connected components and extracts data
/// </summary>
private void FindConnectedComponents()
{
graph = new ObjectGraph();
switch (connectivity)
{
case eConnectivity.TWOD_4: detect4(); break;
case eConnectivity.THREED_6: detect6(); break;
case eConnectivity.TWOD_8: detect8(); break;
case eConnectivity.TWOD_24: detect24(); break;
case eConnectivity.THREED_26: detect26(); break;
default: throw new Exception("Connectivity must be 4, 6, 8, 24 or 26");
}
/* determine the final labels */
int numCom = 0;
int index = -1;
Dictionary<int, ConnectedVoxels> hm = new Dictionary<int, ConnectedVoxels>();
int key;
for (int k = 0; k < depth; k++)
for (int j = 0; j < height; j++)
for (int i = 0; i < width; i++)
if (labeledOutput[++index] != 0f)
{
key = graph.getAncestorLabel((int)labeledOutput[index]);
if (!hm.ContainsKey(key)) hm.Add(key, new ConnectedVoxels(++numCom,
labeledOutputImage,
image,
connectivity));
labeledOutput[index] = hm[key].Label;
hm[key].Add(index, i, j, k);
}
//display(labeledOutput);
if (numCom == 0) return;
/* use the volume constraint */
ConnectedVoxels[] foundObjectsBefore = new ConnectedVoxels[numCom];
ArrayList foundObjectsAfter = new ArrayList();
foreach (ConnectedVoxels fo in hm.Values)
foundObjectsBefore[fo.Label - 1] = fo;
int[] relb = new int[numCom]; // relabel array
for (int i = 0; i < numCom; i++)
relb[i] = i + 1;
int reNumCom = numCom;
for (int i = 0; i < numCom; i++)
if (foundObjectsBefore[i].Volume < min || foundObjectsBefore[i].Volume > max)// || coarr[i].IsOnEdge)
{
relb[i] = 0;
for (int j = i + 1; j < numCom; j++)
{
relb[j]--;
foundObjectsBefore[j].Label--;
}
reNumCom--;
}
else
{
foundObjectsAfter.Add(foundObjectsBefore[i]);
}
// relabel with the constraint
for (int i = 0; i < labeledOutput.Length; i++)
{
index = (int)labeledOutput[i];
if (index > 0 && index != relb[index - 1])
labeledOutput[i] = relb[index - 1];
}
if (reNumCom == 0) return;
this.cc = (ConnectedVoxels[])foundObjectsAfter.ToArray(typeof(ConnectedVoxels));
}
public void Add(ConnectedVoxels cc)
{
}
