interp: Interpolate image values

In imager: Image Processing Library Based on 'CImg'

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 documentation built on May 31, 2023, 8:56 p.m.