cimg.extract: Various shortcuts for extracting colour channels, frames, etc

cimg.extractR Documentation

Various shortcuts for extracting colour channels, frames, etc

Description

Various shortcuts for extracting colour channels, frames, etc

Extract one frame out of a 4D image/video

Usage

frame(im, index)

imcol(im, x)

imrow(im, y)

channel(im, ind)

R(im)

G(im)

B(im)

Arguments

im

an image

index

frame index

x

x coordinate of the row

y

y coordinate of the row

ind

channel index

Functions

  • frame(): Extract frame

  • imcol(): Extract a particular column from an image

  • imrow(): Extract a particular row from an image

  • channel(): Extract an image channel

  • R(): Extract red channel

  • G(): Extract green channel

  • B(): Extract blue channel

Author(s)

Simon Barthelme

Examples


#Extract the red channel from the boats image, then the first row, plot
rw <- R(boats) %>% imrow(10)
plot(rw,type="l",xlab="x",ylab="Pixel value")
#Note that R(boats) returns an image
R(boats)
#while imrow returns a vector or a list
R(boats) %>% imrow(1) %>% str
imrow(boats,1) %>% str


imager documentation built on May 29, 2024, 1:38 a.m.