imager (version 0.14)

selectSimilar: Select a region of homogeneous colour

Description

The underlying algorithm is the same as the bucket fill (AKA flood fill). Unlike with the bucket fill, the image isn't changed, the function simply returns a binary mask of the selected region

Usage

selectSimilar(im, x, y, z = 1, sigma = 0, high_connexity = FALSE)

Arguments

im

an image

x

X-coordinate of the starting point of the region to fill.

y

Y-coordinate of the starting point of the region to fill.

z

Z-coordinate of the starting point of the region to fill.

sigma

Tolerance concerning neighborhood values.

high_connexity

Use 8-connexity (only for 2d images, default FALSE).

See Also

bucketfill

Examples

#Select part of a sail
impart <- selectSimilar(boats,x=169,y=179,sigma=20)
layout(t(1:2))
plot(boats,main="Original")
plot(impart,main="Selected region")