rimager

How do I remove the whitespace around a plotted image?

I want to load an image (PNG/JPEG) in RStudio and then display it. But when I run

plot(load.image("solidblack.png"), ann = FALSE, axes = FALSE, mar = c(0,0,0,0))

I get very substantial margins around my image, despite the mar argument to plot:

enter image description here

How can I fix this?

Solution

  • The image has class "cimg", and therefore plot calls plot.cimg, which ignores the "mar" argument

    You could use display, or set the mar parameters before calling the plot:

    library(imager)
x <- load.image("D:/solidblack.png")

    display(x) # Shows in a new window

    opar <- par(mar=c(0,0,0,0))
plot(x, axes=FALSE)
par(opar)

    enter image description here