root / org.gvsig.toolbox / trunk / org.gvsig.toolbox / org.gvsig.toolbox.algorithm / src / main / java / es / unex / sextante / vegetationIndices / pviRichardson / PVIRichardsonAlgorithm.java @ 59
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package es.unex.sextante.vegetationIndices.pviRichardson; |
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import es.unex.sextante.vegetationIndices.base.DistanceBasedAlgorithm; |
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public class PVIRichardsonAlgorithm |
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extends
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DistanceBasedAlgorithm {
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@Override
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public void defineCharacteristics() { |
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super.defineCharacteristics();
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setName("PVI(Richardson and Wiegand)");
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} |
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@Override
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protected double getIndex(final double dRed, |
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final double dNIR) { |
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final double dA1 = m_dSlope; |
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final double dA0 = m_dIntercept; |
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final double dB1 = 1 / m_dSlope; |
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final double dB0 = dRed - dB1 * dNIR; |
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final double dRgg5 = (dB1 * dA0 - dB0 * dA1) / (dB1 - dA1); |
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final double dRgg7 = (dA0 - dB0) / (dB1 - dA1); |
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return (Math.sqrt(Math.pow(dRgg5 - dRed, 2.) + Math.pow(dRgg7 - dNIR, 2.))); |
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} |
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} |