EBImage (version 4.14.2)

drawCircle: Draw a circle on an image.

Description

Draw a circle on an image.

Usage

drawCircle(img, x, y, radius, col, fill=FALSE, z=1)

Arguments

img

An Image object or an array.

x, y, radius

numerics indicating the center and the radius of the circle.

col

A numeric or a character string specifying the color of the circle.

fill

A logical indicating whether the circle should be filled. Default is FALSE.

z

A numeric indicating on which frame of the image the circle should be drawn. Default is 1.

Value

An Image object or an array, containing the transformed version of img.

Examples

  ## Simple white circle
  x = matrix(0, nrow=300, ncol=300)
  y = drawCircle(x, 100, 200, 47, col=1)
  display(y)
  
  ## Simple filled yellow circle
  x = channel(y, 'rgb')
  y = drawCircle(x, 200, 140, 57, col='yellow', fill=TRUE)
  display(y)