001/** 002 * Copyright (c) 2011, The University of Southampton and the individual contributors. 003 * All rights reserved. 004 * 005 * Redistribution and use in source and binary forms, with or without modification, 006 * are permitted provided that the following conditions are met: 007 * 008 * * Redistributions of source code must retain the above copyright notice, 009 * this list of conditions and the following disclaimer. 010 * 011 * * Redistributions in binary form must reproduce the above copyright notice, 012 * this list of conditions and the following disclaimer in the documentation 013 * and/or other materials provided with the distribution. 014 * 015 * * Neither the name of the University of Southampton nor the names of its 016 * contributors may be used to endorse or promote products derived from this 017 * software without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 029 */ 030package org.openimaj.image.objectdetection.filtering; 031 032import java.util.ArrayList; 033import java.util.List; 034 035import org.openimaj.math.geometry.shape.Shape; 036 037/** 038 * Filter to select the biggest detection. Any detection represented as a 039 * {@link Shape} can be filtered. 040 * 041 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk) 042 * @param <T> 043 * 044 */ 045public class MaxSizeFilter<T extends Shape> implements DetectionFilter<T, T> { 046 @Override 047 public List<T> apply(List<T> input) { 048 T shape = input.get(0); 049 double maxSize = shape.calculateArea(); 050 051 for (int i = 1; i < input.size(); i++) { 052 final T s = input.get(i); 053 final double size = s.calculateArea(); 054 055 if (size > maxSize) { 056 maxSize = size; 057 shape = s; 058 } 059 } 060 061 final List<T> ret = new ArrayList<T>(1); 062 ret.add(shape); 063 return ret; 064 } 065}