identify_thresholded_objects {Bioi}

Assign all neighboring pixels the same group number.

Description

This function is deprecated. It now calls the more efficient find_blobs method.

This function takes a matrix corresponding to a thresholded image and returns a matrix of the same size, where all adjacent, thresholded pixels are the same integer corresponding to that object's cluster number.

Usage

identify_thresholded_objects(img, pixRange = 50)

Arguments

img

A thresholded matrix (where non-object pixels are assigned a value of 0).

pixRange

This parameter is now obsolete. Previously, the parameter denoted an integer number of pixels to specify a search region. Execution was faster when this value was small. However, the value needed to be larger than the diameter of the largest continuous object in the image.

Author(s)

Zach Colburn

Examples

# Generate a random matrix.
set.seed(10)
mat <- matrix(runif(70), nrow = 7)

# Arbitrarily say that everything below 0.8 is background.
mat[mat < 0.8] <- 0

# Find blobs.
identify_thresholded_objects(mat)