translate: Apply simple transformations

In RNiftyReg: Image Registration Using the 'NiftyReg' Library

Apply simple transformations

Description

These functions allow simple transformations to be applied quickly, or in a chosen order. They represent simplified interfaces to the buildAffine and applyTransform functions, and are compatible with the chaining operator from the popular magrittr package (although performing one single transformation may be preferable).

Usage

translate(source, translation, ...)

rescale(source, scales, anchor = c("none", "origin", "centre", "center"),
  ...)

skew(source, skews, anchor = c("none", "origin", "centre", "center"), ...)

rotate(source, angles, anchor = c("none", "origin", "centre", "center"), ...)

Arguments

source	A 2D or 3D image, in the sense of isImage.
translation	Translations along each axis, in pixunits units. May also be a list, such as that produced by decomposeAffine, with elements for translation, scales, skews and angles.
...	Additional arguments to applyTransform.
scales	Scale factors along each axis.
anchor	The fixed point for the transformation. Setting this parameter to a value other than "none" will override the translation parameter, with the final translation set to ensure that the requested point remains in the same place after transformation.
skews	Skews in the XY, XZ and YZ planes.
angles	Roll, pitch and yaw rotation angles, in radians. If source is two-dimensional, a single angle will be interpreted as being in the plane as expected.

Value

The transformed image.

Author(s)

Jon Clayden <[e-mail]>

See Also

buildAffine, applyTransform

RNiftyReg documentation built on July 26, 2023, 5:23 p.m.