1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.math4.neuralnet;
19
20 /**
21 * Defines neighbourhood types.
22 *
23 * @since 3.3
24 */
25 public enum SquareNeighbourhood {
26 /**
27 * <a href="http://en.wikipedia.org/wiki/Von_Neumann_neighborhood">
28 * Von Neumann neighbourhood</a>: in two dimensions, each (internal)
29 * neuron has four neighbours.
30 */
31 VON_NEUMANN,
32 /**
33 * <a href="http://en.wikipedia.org/wiki/Moore_neighborhood">
34 * Moore neighbourhood</a>: in two dimensions, each (internal)
35 * neuron has eight neighbours.
36 */
37 MOORE,
38 }