TensorFlow.NET/src/TensorFlowNET.Keras/Layers/Activation/HardSigmoid.cs

using System;
using System.Collections.Generic;
using System.Text;
using Tensorflow.Keras.ArgsDefinition;
using Tensorflow.Keras.Engine;
using Tensorflow.Common.Types;
using static Tensorflow.Binding;

namespace Tensorflow.Keras.Layers {
      public class HardSigmoid : Layer {
            public HardSigmoid ( LayerArgs args ) : base(args) {
                  // hard sigmoid has no arguments
            }
            protected override Tensors Call ( Tensors inputs, Tensors state = null, bool? training = null, IOptionalArgs? optional_args = null ) {
                  Tensor x = inputs;
                  return tf.clip_by_value(
                      tf.add(tf.multiply(x, 0.2f), 0.5f), 0f, 1f);
            }
            public override Shape ComputeOutputShape ( Shape input_shape ) {
                  return input_shape;
            }
      }
}