public IImageRaster3D <float> Filter(IImageRaster3D <float> source_normal)
{
IImageRaster3D <float> source_inverted = new ImageRaster3D <float>(source_normal);
return(null);
}
public static ImageRaster3D <RangeType> Pad <RangeType>(IImageRaster3D <RangeType> image, RangeType padding_type, int padding_0_low, int padding_0_high, int padding_1_low, int padding_1_high, int padding_2_low, int padding_2_high)
{
ImageRaster3D <RangeType> padded = new ImageRaster3D <RangeType>(image.Raster.Size0 + padding_0_low + padding_0_high,
image.Raster.Size1 + padding_1_low + padding_1_high,
image.Raster.Size2 + padding_2_low + padding_2_high, padding_type);
Parallel.For(0, padded.Raster.Size2 - (padding_2_low + padding_2_high), index_2 =>
{
for (int index_1 = 0; index_1 < padded.Raster.Size1 - (padding_1_low + padding_1_high); index_1++)
{
for (int index_0 = 0; index_0 < padded.Raster.Size0 - (padding_0_low + padding_0_high); index_0++)
{
RangeType value = image.GetElementValue(index_0, index_1, index_2);
padded.SetElementValue(index_0 + padding_0_low, index_1 + padding_1_low, index_2 + padding_2_low, value);
}
}
});
return(padded);
}
public ImageRaster3D(IImageRaster3D <RangeType> other, bool copy_values)
: this(other.Raster, other.GetElementValues(copy_values), false)
{
}
public static ImageRaster3D <RangeType> Pad <RangeType>(IImageRaster3D <RangeType> image, RangeType padding_type, int padding_0, int padding_1, int padding_2)
{
return(Pad(image, padding_type, padding_0, padding_0, padding_1, padding_1, padding_2, padding_2));
}
public IImageRaster3D <bool> FindMedialAxes(IImageRaster3D <bool> image)
{
ImageRaster3D <bool> skeleton_image = ToolsImageRaster.Pad(image, false, 1, 1, 1);
ITopologyElement topology = new TopologyElementRaster3D26Connectivity(skeleton_image.Raster);
int[] euler_table = BuildEulerLookupTable();
bool changes = true;
while (changes)
{
changes = false;
List <int> candidates = ToolsImageRaster.GetShell3D6C(skeleton_image).GetElementIndexesWithValue(true);
if (candidates.Count != 0)
{
// get 26 - neighbourhoods of candidates in volume
List <int[]> neigbourhoods = new List <int[]>();
List <int> end_point_indexes = new List <int>();
for (int candidate_index = 0; candidate_index < candidates.Count; candidate_index++)
{
int[] element_neigbour_array = new int[26];
bool[] element_neigbour_true_array = new bool[26];
topology.ElementNeighboursRBA(candidates[candidate_index], element_neigbour_array);
//int count = 0;
for (int neigbour_index = 0; neigbour_index < topology.MaximumConnectivity; neigbour_index++)
{
//TODO something here
}
}
// remove all endpoints (exactly one nb) from list
neigbourhoods.RemoveAt(end_point_indexes);
candidates.RemoveAt(end_point_indexes);
// remove all non-Euler - invariant points from list
List <int> euler_variate_indexes = new List <int>();
for (int candidate_index = 0; candidate_index < candidates.Count; candidate_index++)
{
if (compute_euler_characteristic(neigbourhoods[candidate_index], euler_table))
{
euler_variate_indexes.Add(candidate_index);
}
}
neigbourhoods.RemoveAt(euler_variate_indexes);
candidates.RemoveAt(euler_variate_indexes);
List <int> is_simple_indexes = new List <int>();
for (int candidate_index = 0; candidate_index < candidates.Count; candidate_index++)
{
if (is_simple(neigbourhoods[candidate_index]))
{
is_simple_indexes.Add(candidate_index);
}
}
// remove all non-simple points from list
candidates.RemoveAt(is_simple_indexes);
//get subscript indices of remaining candidates
//TODO [x, y, z] = ind2sub(padded_image_size, candidates);
// if any candidates left: divide into 8 independent subvolumes TODO this is silly
if (candidates.Count != 0)
{
// do re-checking for all points in each subvolume
List <int> removal_indexes = new List <int>(); //sub2ind(padded_image_size, x(idx), y(idx), z(idx));
skeleton_image.SetElementValues(removal_indexes, false); // remove points
List <int[]> nh = GetNeigbourhoods(skeleton_image, removal_indexes);
List <int> di_rc = new List <int>();
for (int index = 0; index < nh.Count; index++)
{
if (!is_simple(nh[index]))
{
di_rc.Add(index);
}
}
if (di_rc.Count != 0)
{
changes = true; //% at least one voxel removed
skeleton_image.SetElementValues(di_rc, true); // TODO this seems weird
}
}
}
}
return(skeleton_image);
}
