/*-
*******************************************************************************
* Copyright (c) 2011, 2014 Diamond Light Source Ltd.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Matthew Gerring - initial API and implementation and/or initial documentation
*******************************************************************************/
package uk.ac.diamond.scisoft.analysis.histogram.functions;
/**
* Geographical Red channel mapping
*/
public class GeoRedMapFunction extends AbstractMapFunction {
private static final double region1 = 1.0/7.0;
private static final double region2 = 2.0/5.0;
private static final double region3 = 3.0/4.0;
@Override
public String getMapFunctionName() {
return "GeoRed";
}
@Override
public double mapFunction(double input) {
if (input < region1)
return 0;
if (input >= region1 && input < region2)
return (input-region1) * 4;
else if (input >= region2 && input < region3)
return 1.0 - 0.5 * (input-region2);
else if (input >= region3)
return 1.0 - 0.5 * (region3-region2) + 3.75 * (input-region3) * (input-region3);
return 1;
}
}