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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).
interp(im, locations, cubic = FALSE, extrapolate = TRUE)
the image (class cimg)
a data.frame
if TRUE, use cubic interpolation. If FALSE, use linear (default FALSE)
allow extrapolation (to values outside the image)
cimg.limit.openmp() loc <- data.frame(x=runif(10,1,width(boats)),y=runif(10,1,height(boats))) #Ten random locations interp(boats,loc)
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