imager (version 0.42.19)

imager.replace: 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)