seedfill: Color Fill Algorithm

In simecol: Simulation of Ecological (and Other) Dynamic Systems

Description

Fills a bounded area within a numeric matrix with a given number (color).

Usage

 seedfill(z, x=1, y=1, fcol=0, bcol=1, tol=1e-6)

Arguments

z	a matrix containing an image (double precision values are possible).
x, y	start coordinates of the filled area.
fcol	numeric value of the fill color.
bcol	numeric value of the border value.
tol	numeric value of border color tolerance.

Details

The function implements a basic color fill algorithm for use in image manipulation or cellular automata.

Value

A matrix with the same structure as z.

See Also

neighbours

Examples

# define a matrix
z<-matrix(0, nrow=20, ncol=20)

# draw some lines
z[10,]<-z[,10] <- 1
z[5,] <-z[,5]  <- 3

# plot matrix and filled variants
par(mfrow=c(2, 2))
image(z)
image(seedfill(z))
image(seedfill(z ,x=15, y=15, fcol=1, bcol=3))
image(seedfill(z, x=7, y=7, fcol=3, bcol=1))

Example output

Loading required package: deSolve

simecol documentation built on Oct. 7, 2021, 9:20 a.m.