skimage 0.17.2

ParametersReturns
adjust_sigmoid(image, cutoff=0.5, gain=10, inv=False)

Also known as Contrast Adjustment. This function transforms the input image pixelwise according to the equation O = 1/(1 + exp*(gain*(cutoff - I))) after scaling each pixel to the range 0 to 1.

Parameters

image : ndarray

Input image.

cutoff : float, optional

Cutoff of the sigmoid function that shifts the characteristic curve in horizontal direction. Default value is 0.5.

gain : float, optional

The constant multiplier in exponential's power of sigmoid function. Default value is 10.

inv : bool, optional

If True, returns the negative sigmoid correction. Defaults to False.

Returns

out : ndarray

Sigmoid corrected output image.

Performs Sigmoid Correction on the input image.

See Also

adjust_gamma

Examples

See :

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File: /skimage/exposure/exposure.py#540
type: <class 'function'>
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