home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (SubsamplingLayer.java)

This example Java source code file (SubsamplingLayer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

allargsconstructor, builder, default, down-sample, equalsandhashcode, illegalargumentexception, invalid, kernel, noargsconstructor, override, poolingtype, same, subsamplinglayer, suppresswarnings

The SubsamplingLayer.java Java example source code

package org.deeplearning4j.nn.conf.layers;

import lombok.*;

import org.deeplearning4j.nn.conf.Updater;
import org.deeplearning4j.nn.conf.distribution.Distribution;
import org.deeplearning4j.nn.weights.WeightInit;

/**
 * Subsampling layer also referred to as pooling in convolution neural nets
 *
 *  Supports the following pooling types:
 *     MAX
 *     AVG
 *     NON
 * @author Adam Gibson
 */

@Data @NoArgsConstructor
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
public class SubsamplingLayer extends Layer {

    protected PoolingType poolingType;
    protected int[] kernelSize; // Same as filter size from the last conv layer
    protected int[] stride; // Default is 2. Down-sample by a factor of 2
    protected int[] padding;

    public enum PoolingType {
        MAX, AVG, SUM, NONE
    }

    private SubsamplingLayer(Builder builder) {
        super(builder);
        this.poolingType = builder.poolingType;
        if(builder.kernelSize.length != 2)
            throw new IllegalArgumentException("Kernel size of should be rows x columns (a 2d array)");
        this.kernelSize = builder.kernelSize;
        if(builder.stride.length != 2)
            throw new IllegalArgumentException("Invalid stride, must be length 2");
        this.stride = builder.stride;
        this.padding = builder.padding;
    }

    @Override
    public SubsamplingLayer clone() {
        SubsamplingLayer clone = (SubsamplingLayer) super.clone();

        if(clone.kernelSize != null) clone.kernelSize = clone.kernelSize.clone();
        if(clone.stride != null) clone.stride = clone.stride.clone();
        if(clone.padding != null) clone.padding = clone.padding.clone();
        return clone;
    }

    @AllArgsConstructor
    public static class Builder extends Layer.Builder<Builder> {
        private PoolingType poolingType = PoolingType.MAX;
        private int[] kernelSize = new int[] {1, 1}; // Same as filter size from the last conv layer
        private int[] stride = new int[] {2, 2}; // Default is 2. Down-sample by a factor of 2
        private int[] padding = new int[] {0, 0};

        public Builder(PoolingType poolingType, int[] kernelSize, int[] stride) {
            this.poolingType = poolingType;
            this.kernelSize = kernelSize;
            this.stride = stride;
        }

        public Builder(PoolingType poolingType, int[] kernelSize) {
            this.poolingType = poolingType;
            this.kernelSize = kernelSize;
        }

        public Builder(int[] kernelSize, int[] stride, int[] padding) {
            this.kernelSize = kernelSize;
            this.stride = stride;
            this.padding = padding;
        }

        public Builder(int[] kernelSize, int[] stride) {
            this.kernelSize = kernelSize;
            this.stride = stride;
        }

        public Builder(int... kernelSize) {
            this.kernelSize = kernelSize;
        }

        public Builder(PoolingType poolingType) {
            this.poolingType = poolingType;
        }

        public Builder() {}

        @Override
        @SuppressWarnings("unchecked")
        public SubsamplingLayer build() {
            return new SubsamplingLayer(this);
        }

        public Builder poolingType(PoolingType poolingType){
            this.poolingType = poolingType;
            return this;
        }

        public Builder kernelSize(int... kernelSize){
            this.kernelSize = kernelSize;
            return this;
        }

        public Builder stride(int... stride){
            this.stride = stride;
            return this;
        }

        public Builder padding(int... padding){
            this.padding = padding;
            return this;
        }
    }

}

Other Java examples (source code examples)

Here is a short list of links related to this Java SubsamplingLayer.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.