render_resized: Resize Image

In rayimage: Image Processing for Simulated Cameras

Resize Image

Description

Resizes an image or a matrix, using bilinear interpolation.

Usage

render_resized(
  image,
  mag = 1,
  dims = NULL,
  filename = NULL,
  preview = FALSE,
  method = "tri"
)

Arguments

image	Image filename, 3-layer RGB array, or matrix.
mag	Default 1. Amount to magnify the image, preserving aspect ratio. Overridden if dim is not NULL.
dims	Default NULL. Exact resized dimensions.
filename	Default NULL. The filename of the image to be saved. If this is not given, the image will be plotted instead.
preview	Default FALSE. Whether to plot the convolved image, or just to return the values.
method	Default trilinear. Filters to up/downsample the image. Options: bilinear, box, trilinear, catmull, mitchell.

Value

3-layer RGB resized array or matrix.

Examples

if(rayimage:::run_documentation()){
#Plot the image with a title
dragon |>
 add_title("Dragon", title_offset=c(10,10), title_bar_color="black",
           title_size=20, title_color = "white") |>
 plot_image()
}
if(rayimage:::run_documentation()){
#Half of the resolution
render_resized(dragon, mag = 1/2) |>
 add_title("Dragon (half res)", title_offset=c(5,5), title_bar_color="black",
           title_size=10, title_color = "white") |>
 plot_image()
}
if(rayimage:::run_documentation()){
#Double the resolution
render_resized(dragon, mag = 2) |>
 add_title("Dragon (2x res)", title_offset=c(20,20), title_bar_color="black",
           title_size=40, title_color = "white") |>
 plot_image()
}
if(rayimage:::run_documentation()){
#Specify the exact resulting dimensions
render_resized(dragon, dim = c(320,160)) |>
 add_title("Dragon (custom size)", title_offset=c(10,10), title_bar_color="black",
           title_size=20, title_color = "white") |>
 plot_image()
}

rayimage documentation built on Jan. 17, 2023, 9:07 a.m.