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Identify background range polygons

Source: R/giotto_structures.R
dot-identify_background_range_polygons.Rd

function to remove background polygon by comparing individual polygon vertex xy ranges against the overall SpatVector extent. Each SpatVector that this function is run on MUST contain only those polygons that were generated as part of the same FOV. This is because the individual polygons are compared against the overall extent which is assumed to be roughly that of the original mask image.

Usage

.identify_background_range_polygons(spatVector, threshold = 0.9)

Arguments

spatVector

terra polygon spatvector

threshold

if a polygon's x AND y range exceeds this fraction of the overall SpatVector extent, it will be flagged for removal.

Value

A character vector of polygon IDs of variable length (but usually only either length 0 i.e. no background poly to remove, or 1, being the background poly to remove) if used with a correct threshold.