drawArrow: Draw Arrows on an 'Image'

In neuroconductor-devel/Rvision: Basic Computer Vision Library

Description

drawArrow draws arrow segments from the first point to the second over an Image object. This operation is destructive: it changes irreversibly the Image object and cannot be undone.

Usage

drawArrow(image, pt1_x, pt1_y, pt2_x, pt2_y, tip_length = 0.1,
  color = "red", thickness = 1)

Arguments

image	An Image object.
pt1_x	A numeric value or vector representing the x coordinates of the first end of each arrow.
pt1_y	A numeric value or vector representing the y coordinates of the first end of each arrow.
pt2_x	A numeric value or vector representing the x coordinates of the second end of each arrow.
pt2_y	A numeric value or vector representing the y coordinates of the second end of each arrow.
tip_length	A numeric value or vector representing the length of each arrow's tip as a fraction of each arrow's length (default: 0.1).
color	A value or vector of any kind of R color specification compatible with col2rgb representing the color of each arrow (default: "red").
thickness	A numeric value or vector representing the thickness in pixels of each arrow (default: 1).

Value

This function does not return anything. It modifies image in place.

Author(s)

Simon Garnier, [e-mail]

See Also

Image, drawLine

Examples

# TODO

neuroconductor-devel/Rvision documentation built on May 16, 2021, 5:16 p.m.