imager (version 0.42.19)

medianblur: Blur image with the median filter. In a window of size n x n centered at pixel (x,y), compute median pixel value over the window. Optionally, ignore values that are too far from the value at current pixel.

Description

Blur image with the median filter.

In a window of size n x n centered at pixel (x,y), compute median pixel value over the window. Optionally, ignore values that are too far from the value at current pixel.

Usage

medianblur(im, n, threshold = 0)

Arguments

im

an image

n

Size of the median filter.

threshold

Threshold used to discard pixels too far from the current pixel value in the median computation. Can be used for edge-preserving smoothing. Default 0 (include all pixels in window).

See Also

isoblur, boxblur

Examples

medianblur(boats,5) %>% plot(main="Median blur, 5 pixels")
medianblur(boats,10) %>% plot(main="Median blur, 10 pixels")
medianblur(boats,10,8) %>% plot(main="Median blur, 10 pixels, threshold = 8")