imager.replace {imager} | R Documentation |
Replace part of an image with another
Description
These replacement functions let you modify part of an image (for example, only the red channel). Note that cimg objects can also be treated as regular arrays and modified using the usual [] operator.
Usage
channel(x, ind) <- value
R(x) <- value
G(x) <- value
B(x) <- value
frame(x, ind) <- value
Arguments
x |
an image to be modified |
ind |
an index |
value |
the image to insert |
Functions
-
channel(x, ind) <- value
: Replace image channel -
R(x) <- value
: Replace red channel -
G(x) <- value
: Replace green channel -
B(x) <- value
: Replace blue channel -
frame(x, ind) <- value
: Replace image frame
See Also
imdraw
Examples
boats.cp <- boats
#Set the green channel in the boats image to 0
G(boats.cp) <- 0
#Same thing, more verbose
channel(boats.cp,2) <- 0
#Replace the red channel with noise
R(boats.cp) <- imnoise(width(boats),height(boats))
#A new image with 5 frames
tmp <- imfill(10,10,5)
#Fill the third frame with noise
frame(tmp,3) <- imnoise(10,10)
[Package imager version 1.0.2 Index]