imager: interp – R documentation

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interp

Interpolate image values

Description

This function provides 2D and 3D (linear or cubic) interpolation for pixel values. Locations need to be provided as a data.frame with variables x,y,z, and c (the last two are optional).

Usage

interp(im, locations, cubic = FALSE, extrapolate = TRUE)

Arguments

`im`	the image (class cimg)
`locations`	a data.frame
`cubic`	if TRUE, use cubic interpolation. If FALSE, use linear (default FALSE)
`extrapolate`	allow extrapolation (to values outside the image)

Examples

loc <- data.frame(x=runif(10,1,width(boats)),y=runif(10,1,height(boats))) #Ten random locations
interp(boats,loc)

imager

Image Processing Library Based on 'CImg'

v0.42.10

LGPL-3

Authors

Simon Barthelme [aut], David Tschumperle [ctb], Jan Wijffels [ctb], Haz Edine Assemlal [ctb], Shota Ochi [cre]

Initial release