Extract multiple outlines from mask image — from_mask

Extracts outlines from a mask containing multiple objects using base R's contourLines(). Each connected object gets its own outline. No external dependencies required.

Usage

from_mask_multi(path, fuzz = 20, min_size = 10)

Arguments

path: Character. Path to image file, or mask matrix
fuzz: Integer. Fuzz/tolerance for flood fill (0-255). Default 20 Only used if path is character
min_size: Integer. Minimum number of points for an outline. Default 10 Filters out tiny spurious contours

Value

List of outline matrices, each (n × 2) with class c("out", "coo", "matrix", "array")

Examples

if (FALSE) { # \dontrun{
# Extract all objects
outlines <- from_mask_multi("petri_dish.png")
length(outlines)  # Number of objects found

# Plot them
plot(outlines[[1]], type = "l", asp = 1)
for (i in 2:length(outlines)) {
  lines(outlines[[i]], col = i)
}
} # }