plot.OF_array: Plot Optical Flow Arrays
In neuroconductor-releases/Rvision: Basic Computer Vision Library

Plotting method for objects of class OF_array as produced by the farneback function.

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## S3 method for class 'OF_array'
plot(x, gridsize = c(25, 25), thresh = 0,
  add = TRUE, arrow.ex = 0.05, xpd = TRUE, ...)

`x`	An object of class `OF_array`.
`gridsize`	A 2-element vector indicating the number of optical flow vectors to plot in each x-y dimension (default: c(25, 25)). Alternatively, a numeric value that will be used for both dimensions.
`thresh`	The minimal length of optical flow vectors that should be plotted (default: 0).
`add`	A logical indicating whether to plot the vector field over an existing plot (default: FALSE).
`arrow.ex`	Controls the length of the arrows. The length is in terms of the fraction of the shorter axis in the plot. So with a default of .05, 20 arrows of maximum length can line up end to end along the shorter axis.
`xpd`	If true does not clip arrows to fit inside the plot region, default is not to clip.
`...`	Graphics arguments passed to the `arrows` function that can change the color or arrow sizes. See help on this for details.