mvpa2.misc.surfing.volsurf.VolumeBasedSurface

class mvpa2.misc.surfing.volsurf.VolumeBasedSurface(vg)

A surface based on a volume, where every voxel is a node. It has the empty topology, meaning there are no edges between nodes (voxels)

Use case: provide volume-based searchlight behaviour. In that case finding neighbouring nodes is supposed to be faster using the circlearound_n2d method.

XXX make a separate module?

Attributes

average_node_edge_length	Average length of edges associated with each face
center_of_mass	Computes the center of mass
edge2face	A mapping from edges to the face that contains that edge
face_areas
face_edge_length	Length of edges associated with each face
face_normals
faces	Returns:
neighbors	Finds the neighbours for each node and their (Euclidean) distance.
nfaces	Returns:
node2faces	A mapping from node indices to the faces that contain those nodes.
node_areas
node_normals
nvertices	Returns:
vertices	Returns:

Methods

circlearound_n2d(src, radius[, metric])

Parameters:

vg: Volgeom.volgeom or str or NiftiImage

volume to be used as a surface

Attributes

average_node_edge_length	Average length of edges associated with each face
center_of_mass	Computes the center of mass
edge2face	A mapping from edges to the face that contains that edge
face_areas
face_edge_length	Length of edges associated with each face
face_normals
faces	Returns:
neighbors	Finds the neighbours for each node and their (Euclidean) distance.
nfaces	Returns:
node2faces	A mapping from node indices to the faces that contain those nodes.
node_areas
node_normals
nvertices	Returns:
vertices	Returns:

Methods

circlearound_n2d(src, radius[, metric])

circlearound_n2d(src, radius, metric='euclidean')