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SVMClassifier.java
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SVMClassifier.java
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/*-
* #%L
* This file is part of QuPath.
* %%
* Copyright (C) 2014 - 2016 The Queen's University of Belfast, Northern Ireland
* Contact: IP Management (ipmanagement@qub.ac.uk)
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #L%
*/
package qupath.opencv.classify;
import org.bytedeco.opencv.opencv_ml.SVM;
import qupath.lib.plugins.parameters.ParameterList;
/**
* Wrapper for OpenCV's SVM classifier.
*
* @author Pete Bankhead
*
*/
public class SVMClassifier extends ParameterizableOpenCvClassifier<SVM> {
@Override
protected SVM createClassifier() {
SVM svm = SVM.create();
ParameterList params = getParameterList();
// System.out.println("Default C: " + svm.getC());
if (params != null) {
String kernel = (String)params.getChoiceParameterValue("kernel");
kernel = kernel.toLowerCase();
if (kernel.equals("linear"))
svm.setKernel(SVM.LINEAR);
else if (kernel.equals("polynomial"))
svm.setKernel(SVM.POLY);
else if (kernel.equals("rbf"))
svm.setKernel(SVM.RBF);
else if (kernel.equals("sigmoid"))
svm.setKernel(SVM.SIGMOID);
else if (kernel.equals("chi2"))
svm.setKernel(SVM.CHI2);
else if (kernel.equals("histogram intersection"))
svm.setKernel(SVM.INTER);
double c = params.getDoubleParameterValue("c");
if (c > 0)
svm.setC(c);
svm.setGamma(params.getDoubleParameterValue("gamma"));
svm.setDegree(params.getIntParameterValue("degree"));
}
return svm;
}
@Override
public String getName() {
return "SVM";
}
@Override
public boolean supportsAutoUpdate() {
return false;
}
@Override
protected ParameterList createParameterList() {
return new ParameterList()
.addChoiceParameter("kernel", "Kernel type", "RBF", new String[]{"Linear", "Polynomial", "RBF", "Histogram intersection"})
.addDoubleParameter("c", "C", 1, null, "C parameter for SVM optimization; must be > 0")
.addDoubleParameter("gamma", "Gamma", 1, null, "Gamma parameter for SVM optimization")
.addIntParameter("degree", "Polynomial degree", 0, null, "Set polynomial degree - only relevant to 'polynomial' kernal type. Lower values preferred for stability.");
}
}