Image Rotation and Scaling — rotateScale • Rvision

rotateScale rotates (clockwise) and scales an image using the warpAffine function.

Usage

rotateScale(
  image,
  center = (dim(image)[2:1] - 1)/2,
  angle = 90,
  scale = 1,
  ...
)

Arguments

image: An Image object.
center: A 2-elements vector indicating the location (row, column) of the center of the rotation in the source image. It defaults to the center of the image.
angle: A numeric value indicating the rotation angle in degrees (default: 90).
scale: A numeric value indicating an isotropic scale factor (default: 1).
...: Additional parameters for the warpAffine function.

Value

An Image object.

See also

Author

Simon Garnier, garnier@njit.edu

Examples

img <- image(system.file("sample_img/balloon1.png", package = "Rvision"))
img_rotated <- rotateScale(img, c(50, 50), 45, 1)