threshold

pixels included or excluded based on brightness

$ pierogis threshold ./input.jpg -u 150 -l 20

very chill.

By default, pixels with brightness outside of the thresholds provided become “included”, and pixels within the thresholds become “excluded” (greater than lower, but less than upper). This can be flipped by providing the --inner flag.

By default, included means replaced with white, excluded with black.

sort uses this under the hood.

arg	description	default	valid
-l, --lower-threshold	pixels with intensity below this value are sorted	64	0-255
-u, --upper-threshold	pixels with intensity above this value are sorted	180	0-255
--inner	if provided, pixels between the threshold values are included in the sort	180	flag
--include	hex color to substitute for white	'ffffff'	0-3
--exclude	hex color to substitute for black	'000000'	0-3

See: ThresholdFilling, Threshold