imsharpen: Sharpen image.

In imager: Image Processing Library Based on 'CImg'

Sharpen image.

Description

The default sharpening filter is inverse diffusion. The "shock filter" is a non-linear diffusion that has better edge-preserving properties.

Usage

imsharpen(im, amplitude, type = "diffusion", edge = 1, alpha = 0, sigma = 0)

Arguments

im	an image
amplitude	Sharpening amplitude (positive scalar, 0: no filtering).
type	Filtering type. "diffusion" (default) or "shock"
edge	Edge threshold (shock filters only, positive scalar, default 1).
alpha	Window size for initial blur (shock filters only, positive scalar, default 0).
sigma	Window size for diffusion tensor blur (shock filters only, positive scalar, default 0).

Examples

layout(t(1:2))
plot(boats,main="Original")
imsharpen(boats,150)  %>% plot(main="Sharpened")

imager documentation built on May 29, 2024, 1:38 a.m.