skimage2.filters.threshold_triangle#

skimage2.filters.threshold_triangle(image, nbins=256)[source]#

Return threshold value based on the triangle algorithm.

Parameters:

image(M, N[, …]) ndarray: Grayscale input image.
nbinsint, optional: Number of bins used to calculate histogram. This value is ignored for integer arrays.

Returns:

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

References

[1]

Zack, G. W., Rogers, W. E. and Latt, S. A., 1977, Automatic Measurement of Sister Chromatid Exchange Frequency, Journal of Histochemistry and Cytochemistry 25 (7), pp. 741-753 DOI:10.1177/25.7.70454

[2]

ImageJ AutoThresholder code, http://fiji.sc/wiki/index.php/Auto_Threshold

Examples

>>> from _skimage2.data import camera
>>> image = camera()
>>> thresh = threshold_triangle(image)
>>> binary = image > thresh