tf.keras.activations.hard_sigmoid

Hard sigmoid activation function.

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Compat aliases for migration

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`tf.compat.v1.keras.activations.hard_sigmoid`

tf.keras.activations.hard_sigmoid(
    x
)

A faster approximation of the sigmoid activation. Piecewise linear approximation of the sigmoid function. Ref: 'https://en.wikipedia.org/wiki/Hard_sigmoid'

For example:

a = tf.constant([-3.0,-1.0, 0.0,1.0,3.0], dtype = tf.float32)
b = tf.keras.activations.hard_sigmoid(a)
b.numpy()
array([0. , 0.3, 0.5, 0.7, 1. ], dtype=float32)

Args
x	Input tensor.

Returns
The hard sigmoid activation, defined as: if x < -2.5: return 0 if x > 2.5: return 1 if -2.5 <= x <= 2.5: return 0.2 * x + 0.5