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.
Input image.
Cutoff of the sigmoid function that shifts the characteristic curve in horizontal direction. Default value is 0.5.
The constant multiplier in exponential's power of sigmoid function. Default value is 10.
If True, returns the negative sigmoid correction. Defaults to False.
Sigmoid corrected output image.
Performs Sigmoid Correction on the input image.
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