imager (version 0.14)

blur_anisotropic: Blur image anisotropically, in an edge-preserving way.

Description

Blur image anisotropically, in an edge-preserving way.

Usage

blur_anisotropic(im, amplitude, sharpness = 0.7, anisotropy = 0.6,
  alpha = 0.6, sigma = 1.1, dl = 0.8, da = 30, gauss_prec = 2,
  interpolation_type = 0L, is_fast_approx = TRUE)

Arguments

im

an image

amplitude

Amplitude of the smoothing.

sharpness

Sharpness.

anisotropy

Anisotropy.

alpha

Standard deviation of the gradient blur.

sigma

Standard deviation of the structure tensor blur.

dl

Spatial discretization.

da

Angular discretization.

gauss_prec

Precision of the diffusion process.

interpolation_type

Interpolation scheme. Can be 0=nearest-neighbor | 1=linear | 2=Runge-Kutta

is_fast_approx

Determines if a fast approximation of the gaussian function is used or not.

Examples

im <- load.image(system.file('extdata/Leonardo_Birds.jpg',package='imager'))
im.noisy <- (im + 80*rnorm(prod(dim(im))))
blur_anisotropic(im.noisy,ampl=1e4,sharp=1) %>% plot