Boundary conditions
bound_condition_maker(mask)
Assigns boundary conditions to a binary mask and returns a 4D array representing the boundary condition at each voxel in three orthogonal directions.
This function processes a 3D binary mask, calculating boundary conditions for
each voxel. Boundary conditions can be INTERIOR, FORWARD, BACKWARD, or
NONE, depending on the presence of neighboring voxels.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
mask
|
Image3D
|
A binary mask where non-zero values represent the region of interest. |
required |
Returns:
| Name | Type | Description |
|---|---|---|
Image3D |
Image3D
|
A 4D array (same spatial dimensions as |
bound_condition_maker_inner(mask, padded_mask)
Core implementation for computing boundary conditions.
This function iterates over all non-zero voxels in the mask and determines the boundary condition for each voxel in the X, Y, and Z directions.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
mask
|
ndarray
|
A 3D binary mask. |
required |
padded_mask
|
ndarray
|
The same mask padded by one voxel in each dimension, to simplify boundary condition calculations. |
required |
Returns:
| Type | Description |
|---|---|
ndarray
|
np.ndarray: A 4D array of the same spatial dimensions as |
check_neighbors(mask, x, y, z, direction)
Checks the neighbors of a voxel in a specific direction and determines its boundary condition.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
mask
|
ndarray
|
A binary mask (3D array). |
required |
x
|
int
|
X-coordinate of the voxel. |
required |
y
|
int
|
Y-coordinate of the voxel. |
required |
z
|
int
|
Z-coordinate of the voxel. |
required |
direction
|
Direction
|
The direction to check ( |
required |
Returns:
| Name | Type | Description |
|---|---|---|
int |
int
|
The boundary condition value (e.g., |