R: Apply simple transformations

translate {RNiftyReg}

R Documentation

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)