vol.boundary.mask: Compute foreground pixels over the whole 3D imagestack.

In fsbrain: Managing and Visualizing Brain Surface Data

Compute foreground pixels over the whole 3D imagestack.

Description

Compute, over all images in a stack along an axis, the foreground and background pixels as a binary mask. A pixel is a foreground pixel iff its value is greater than the threshold parameter in at least one of the slices. A pixel is a background pixel iff its value is below or euqal to the threshold in all slices.

Usage

vol.boundary.mask(volume, plane = 1L, threshold = 0L)

Arguments

volume	a 3D image volume
plane	integer vector of length 2 or something that will be turned into one by vol.plane.axes.
threshold	numerical, the threshold intensity used to separate background and foreground. All voxels with intensity values greater than this value will be considered foreground voxels.

Value

integer 2D matrix with dimensions of a slice of the volume. Positions set to 1 are foreground pixels and positions set to 0 are background pixels (see Details section).

fsbrain documentation built on Aug. 23, 2026, 5:06 p.m.