boofcv.factory.feature.associate.ConfigAssociateNearestNeighbor Maven / Gradle / Ivy

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/*
 * Copyright (c) 2011-2018, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package boofcv.factory.feature.associate;

import boofcv.struct.Configuration;

/**
 * Configuration for {@link boofcv.alg.feature.associate.AssociateNearestNeighbor}.
 *
 * @author Peter Abeles
 */
public class ConfigAssociateNearestNeighbor implements Configuration {
	/**
	 * If true then the score which represents the distance between two features is squared. If this flag
	 * is true then when the score ratio is computed the square root will be used.
	 */
	public boolean distanceIsSquared = true;

	/**
	 * If less than one then the best two matches are found the ratio is defined as the distance of the best
	 * divided by the distance of the second best. Matches are only accepted if less than this ratio
	 */
	public double scoreRatioThreshold = 0.8;

	/**
	 * If more than zero then this is the maximum allowed error/distance between two features for a match to
	 * be accepted
	 */
	public double maxErrorThreshold = Double.MAX_VALUE;

	@Override
	public void checkValidity() {
		if( scoreRatioThreshold <= 0 )
			throw new IllegalArgumentException("Ratio must be more than zero");
	}
}