patch_set: Generate a set of coordinate "patches" of fixed size from an...

In bbuchsbaum/neuroim2: Data Structures for Brain Imaging Data

Generate a set of coordinate "patches" of fixed size from an image object.

Description

Generate a set of coordinate "patches" of fixed size from an image object.

Usage

patch_set(x, dims, mask, ...)

Arguments

x	the object to extract patches from
dims	a vector indicating the dimensions of the patches
mask	mask indicating the valid patch area
...	additional args

Value

A list of coordinate patches, each representing a fixed-size region of the input object.

Examples

# Create a simple 3D volume
space <- NeuroSpace(c(10,10,10), spacing=c(1,1,1))
vol <- NeuroVol(array(rnorm(1000), c(10,10,10)), space)

# Create a mask with some active voxels
mask <- LogicalNeuroVol(vol > 0, space)

# Extract 3x3x3 patches centered at each active voxel
patches <- patch_set(vol, dims=c(3,3,3), mask=mask)

# Access the first patch
patch1 <- patches[[1]]
dim(patch1)  # Should be c(27) (flattened 3x3x3 patch)

bbuchsbaum/neuroim2 documentation built on Feb. 26, 2025, 3:49 p.m.