gabor_kernel: Create a gabor filter kernel

In tsuda16k/pictplot: Image processing functions

Create a gabor filter kernel

Description

Create a gabor filter kernel

Usage

gabor_kernel(
  ksize = sigma * 6,
  sigma = min(ksize)/6,
  lambd = min(ksize)/4,
  theta = 0,
  psi = 0,
  gamma = 1,
  normalize = TRUE,
  mask = FALSE
)

Arguments

ksize	the size of the gabor kernel. should be odd number (if not, incremented by one).
sigma	the standard deviation of the Gaussian function
lambd	the wavelength of the sinusoidal factor
theta	the orientation of the normal to the parallel stripes of the Gabor function
psi	the phase offset
gamma	the spatial aspect ratio
normalize	if TRUE (default), kernel is normalized (the zero-summing normalization)
mask	if TRUE, circular mask is applied.

Examples

gb = gabor_kernel( ksize = 61 )
plot(gb, rescale = TRUE)
gb = gabor_kernel( ksize = 61, theta = pi/6 )
plot(gb, rescale = TRUE)

tsuda16k/pictplot documentation built on March 1, 2023, 8:44 p.m.