imrotate: Rotate an image along the XY plane.

In imager: Image Processing Library Based on 'CImg'

Rotate an image along the XY plane.

Description

If cx and cy aren't given, the default is to centre the rotation in the middle of the image. When cx and cy are given, the algorithm used is different, and does not change the size of the image.

Usage

imrotate(im, angle, cx, cy, interpolation = 1L, boundary = 0L)

Arguments

im	an image
angle	Rotation angle, in degrees.
cx	Center of rotation along x (default, image centre)
cy	Center of rotation along y (default, image centre)
interpolation	Type of interpolation. One of 0=nearest,1=linear,2=cubic.
boundary	Boundary conditions. One of 0=dirichlet, 1=neumann, 2=periodic

See Also

imwarp, for flexible image warping, which includes rotations as a special case

Examples

imrotate(boats,30) %>% plot
#Shift centre to (20,20)
imrotate(boats,30,cx=20,cy=20) %>% plot 

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