Draw a circle on an image.
Draw a circle on an image.
drawCircle(img, x, y, radius, col, fill=FALSE, z=1)
img |
An |
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 |
z |
A numeric indicating on which frame of the image the circle should be drawn. Default is 1. |
An Image object or an array, containing the transformed version
of img.
Gregoire Pau, 2010
## 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)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.