createBackground: Background detection

In trackdem: Particle Tracking and Demography

Background detection

Description

createBackground detects the still background, containing all motionless pixels (non particles). Three different methods to detect the background can be used.

Usage

createBackground(colorimages, method = "mean")

Arguments

colorimages	Array of class 'TrDm' containing all images, obtained by loadImages.
method	Use method='mean' to calculate the mean value for each pixel and color. Use method='powerroot' to deflate dark values (note, this can only be used for dark particles on a light background). Use method='filter' to replace pixels in which movement has occurred with the mode of neighboring values. Note that method='filter' is computationally more intensive.

Value

Array of class 'TrDm' and 'colorimage' containing detected background.

Author(s)

Marjolein Bruijning, Caspar A. Hallmann & Marco D. Visser

Examples

## Not run: 
dir.create("images")
## Create image sequence
traj <- simulTrajec(path="images",
                    nframes=30,nIndividuals=20,domain="square",
                    h=0.01,rho=0.9,
                    sizes=runif(20,0.004,0.006))
## Load images
dir <- "images"
allFullImages <- loadImages (dirPictures=dir,nImages=1:30)
stillBack <- createBackground(allFullImages,method="mean")
plot(stillBack)

## End(Not run)

trackdem documentation built on May 29, 2024, 7:43 a.m.