Binarize

Binarize[image]
creates a binary image from image by replacing all values above a globally determined threshold with 1 and others with 0.

Binarize[image, t]
creates a binary image by replacing all values above t with 1 and others with 0.

Binarize[image, {t₁, t₂}]
creates a binary image by replacing all values in the range t₁ through t₂ with 1 and others with 0.

Binarize[image, f]
creates a binary image by replacing all channel value lists for which f[v] yields True with 1, and others with 0.

Binarize works with any image. It converts multichannel and color images into grayscale images, then produces an image in which every pixel has value 0 or 1.

Binarize[image, {t, t}] effectively sets pixels with value t to 1, and all other pixels to 0.

In Binarize[image, f], the function f is applied to the list of channel values for each pixel.

Binarize[image, Method->method] specifies the method to use to determine the threshold.

The default setting is Method->"Cluster", corresponding to cluster variance maximization.

	{"BlackFraction",b}	make a fraction b of all pixels be black
	"Cluster"	cluster variance maximization (Otsu's algorithm)
	"Entropy"	histogram entropy minimization (Kapur's method)
	"Mean"	use the mean level as the threshold
	"Median"	use the median pixel level as the threshold
	"MinimumError"	Kittler-Illingworth minimum error thresholding method