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bundles / skimage 0.26.1rc0.dev0+git20260530.b607368ff / skimage / filters / thresholding / threshold_otsu

function

skimage.filters.thresholding:threshold_otsu

source: /dev/scikit-image/src/skimage/filters/thresholding.py :333

Signature

def   threshold_otsu ( image = None ,  nbins = 256 ,  * ,  hist = None )

Summary

Return threshold value based on Otsu's method.

Extended Summary

Either image or hist must be provided. If hist is provided, the actual histogram of the image is ignored.

Parameters

image : (M, N[, ...]) ndarray, optional

Grayscale input image.

nbins : int, optional

Number of bins used to calculate histogram. This value is ignored for integer arrays.

hist : array, or 2-tuple of arrays, optional

Histogram from which to determine the threshold, and optionally a corresponding array of bin center intensities. If no hist provided, this function will compute it from the image.

Returns

threshold : float

Upper threshold value. All pixels with an intensity higher than this value are assumed to be foreground.

Notes

The input image must be grayscale.

Examples

from skimage.data import camera
image = camera()
thresh = threshold_otsu(image)
binary = image <= thresh
✓

Aliases

  • skimage.filters.threshold_otsu

Referenced by

This package