imganiso2D: create an image that visualizes anisotropy
Description
The function creates an object of class adimpro that
visualizes anisotropy information using the HSI color space for
main direction of anisotropy (H), maximum eigenvalue^satexp (S)
and log(excentricity) (I).
Usage
imganiso2D(x, satexp = 0.25, g=3, rho=0)
Arguments
x
a field of 2D tensors (Dimension c(3,n1,n2)) or an object of class "adimpro".
satexp
exponent for maximum eigenvalue in saturation channel. Determines the contrast in this channel.
g
Bandwidth for anisotropic smoothing gradient estimates,
preferably $g \ge 3$ for images with line type texture and small
$g \approx 1$ for improving edges between homogeneous regions.
rho
Regularization parameter for anisotropic smoothing gradient estimates,
preferably $\rho = 0$ for images with line type texture and large
$\rho \approx 3*variance$ for improving edges between homogeneous regions.
Value
an object (image) of class adimpro.
References
Polzehl, J. and Tabelow, K. (2007). Adaptive smoothing of digital
images, Journal of Statistical Software 19 (1).