imager (version 0.14)

as.cimg.function: Create an image by sampling a function

Description

Similar to as.im.function from the spatstat package, but simpler. Creates a grid of pixel coordinates x=1:width,y=1:height and (optional) z=1:depth, and evaluates the input function at these values.

Usage

## S3 method for class 'function':
as.cimg(obj, width, height, depth = 1,
  normalise.coord = FALSE, ...)

Arguments

obj

a function with arguments (x,y) or (x,y,z). Must be vectorised.

width

width of the image (in pixels)

height

height of the image (in pixels)

depth

depth of the image (in pixels)

normalise.coord

coordinates are normalised so that x,y,z are in (0,1) (default FALSE)

...

ignored

Value

• an object of class cimg

Examples

im = as.cimg(function(x,y) cos(sin(x*y/100)),100,100)
plot(im)
im = as.cimg(function(x,y) cos(sin(x*y/100)),100,100,normalise.coord=TRUE)
plot(im)