equalize-hist

equalize_hist

skimage.exposure.equalize_hist(image, nbins=256, mask=None) [source]

Return image after histogram equalization.

Parameters:	image : array Image array. nbins : int, optional Number of bins for image histogram. Note: this argument is ignored for integer images, for which each integer is its own bin. mask: ndarray of bools or 0s and 1s, optional Array of same shape as image. Only points at which mask == True are used for the equalization, which is applied to the whole image.
Returns:	out : float array Image array after histogram equalization.

Notes

This function is adapted from [R88] with the author’s permission.

References

[R88]

(1, 2) http://www.janeriksolem.net/2009/06/histogram-equalization-with-python-and.html

[R89]

http://en.wikipedia.org/wiki/Histogram_equalization