drawEllipse: Draw Ellipses on an 'Image'
In neuroconductor-devel-releases/Rvision: Basic Computer Vision Library

Description Usage Arguments Value Author(s) See Also Examples

drawEllipse draws ellipses (or part of) over an Image object. This operation is destructive: it changes irreversibly the Image object and cannot be undone.

1 2	drawEllipse(image, x, y, axis1, axis2, angle, start_angle = 0, end_angle = 360, color = "red", thickness = 1)

`image`	An `Image` object.
`x`	A numeric value or vector representing the x coordinates of the centers of each ellipse
`y`	A numeric value or vector representing the y coordinates of the centers of each ellipse
`axis1`	A numeric value or vector representing the half-length of the first axis of each ellipse.
`axis2`	A numeric value or vector representing the half-length of the second axis of each ellipse.
`angle`	A numeric value or vector representing the angle in degrees between `axis1` and the horizontal.
`start_angle`	A numeric value or vector representing the start angle in degrees of each elliptic arc (default: 0).
`end_angle`	A numeric value or vector representing the end angle in degrees of each elliptic arc (default: 360).
`color`	A value or vector of any kind of R color specification compatible with `col2rgb` representing the color of each ellipse's outline (default: "red").
`thickness`	A numeric value or vector representing the thickness in pixels of each ellipse's outline (default: 1). If negative, then a filled ellipse is drawn.