/// <summary>
/// Max pool layer.
/// The max pool layers function is to progressively reduce the spatial size of the representation
/// to reduce the amount of parameters and computation in the network.
/// The reduction is only done on the width and height. Depth dimension is preserved.
/// </summary>
/// <param name="poolWidth">The width of the pool area (default is 2)</param>
/// <param name="poolHeight">The height of the pool area (default is 2)</param>
/// <param name="stride">Controls the distance between each neighbouring pool areas (default is 2)</param>
/// <param name="borderMode">Border mode of the max pool operation.
/// This will set the width and height padding automatically based on the selected border mode: Valid, Same or Full (default is Valid).</param>
public MaxPool2DLayer(int poolWidth, int poolHeight, int stride = 2, BorderMode borderMode = BorderMode.Valid)
: this(poolWidth, poolHeight, stride,
ConvUtils.PaddingFromBorderMode(poolWidth, borderMode),
ConvUtils.PaddingFromBorderMode(poolHeight, borderMode))
{
BorderMode = borderMode;
}
/// <summary>
/// 2D Convolutional layer using GEMM implementation
/// based on: https://petewarden.com/2015/04/20/why-gemm-is-at-the-heart-of-deep-learning/
/// and: https://arxiv.org/pdf/1410.0759.pdf
/// </summary>
/// <param name="filterWidth">The width of the filters</param>
/// <param name="filterHeight">The height of the filters</param>
/// <param name="filterCount">The number of filters</param>
/// <param name="stride">Controls the distance between each neighbouring filter (default is 1)</param>
/// <param name="borderMode">Border mode of the convolutional operation.
/// This will set the width and height padding automatically based on the selected border mode: Valid, Same or Full (default is Valid)</param>
/// <param name="activation">Type of activation function used (default is Relu)</param>
public Conv2DLayer(int filterWidth, int filterHeight, int filterCount, int stride = 1,
BorderMode borderMode = BorderMode.Valid, Activation activation = Activation.Relu)
: this(filterWidth, filterHeight, filterCount, stride,
ConvUtils.PaddingFromBorderMode(filterWidth, borderMode),
ConvUtils.PaddingFromBorderMode(filterHeight, borderMode))
{
BorderMode = borderMode;
}
