im3d-coords {nat}

Interconvert pixel and physical coordinates

Description

xyzpos converts pixel coordinates to physical coordinates

ijkpos converts physical coordinates to pixel coordinates

Usage

xyzpos(d, ijk)

ijkpos(d, xyz, roundToNearestPixel = TRUE)

Arguments

d

An im3d object defining a physical space

ijk

an Nx3 matrix of pixel coordinates (1-indexed)

xyz

Nx3 matrix of physical coordinates

roundToNearestPixel

Whether to round calculated pixel coordinates to nearest integer value (i.e. nearest pixel). default: TRUE

Value

Nx3 matrix of physica l or pixel coordinates

See Also

ind2coord

Other im3d: as.im3d(), boundingbox(), im3d-io, im3d(), imexpand.grid(), imslice(), is.im3d(), mask(), origin(), projection(), threshold(), unmask(), voxdims()

Examples

# make an emty im3d
d=im3d(,dim=c(20,30,40),origin=c(10,20,30),voxdims=c(1,2,3))
# check round trip for origin
stopifnot(all.equal(ijkpos(d,xyzpos(d,c(1,1,1))), c(1,1,1)))