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BoofCV is an open source Java library for real-time computer vision and robotics applications.
/*
* Copyright (c) 2011-2017, 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.alg.weights;
/**
* The distribution is a cropped Gaussian distribution with mean at 0. Note
* that this matches the shape of the distribution but is not correctly normalized. Input is assumed to be
* the distance squared. Does not check to see if distance is less than zero
*
* @author Peter Abeles
*/
public class WeightDistanceSqGaussian_F32 implements WeightDistance_F32 {
float sigma;
public WeightDistanceSqGaussian_F32(float sigma) {
this.sigma = sigma;
}
@Override
public float weight(float distanceSq) {
return (float)Math.exp( - distanceSq/(2.0f*sigma*sigma) );
}
}