R: Resize Image

render_resized {rayimage}

R Documentation

Resize Image

Description

Resizes an image or a matrix, using bilinear interpolation.

Usage

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

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.

Value

3-layer RGB resized array or matrix.

Examples

#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()


#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()

#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()

#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()

[Package rayimage version 0.3.1 Index]