org.esa.beam.util.math
Class FullyConstrainedLSU

java.lang.Object
  org.esa.beam.util.math.FullyConstrainedLSU

All Implemented Interfaces:

SpectralUnmixing

public class FullyConstrainedLSU
extends Object
implements SpectralUnmixing

Performs a fully constrained linear spectral unmixing, where all abundances are non-negative and their sum is equal to unity.

Since:

4.1

Version:

$Revision$ $Date$

Author:

Helmut Schiller (GKSS), Ralf Quast

Constructor Summary

FullyConstrainedLSU(double[][] endmembers)

Method Summary

double[][]	mix(double[][] abundances) Calculates the spectra for a set of abundances.
double[][]	unmix(double[][] spectra) Performs a linear spectral unmixing of a set of spectra.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FullyConstrainedLSU

public FullyConstrainedLSU(double[][] endmembers)

Method Detail

unmix

public double[][] unmix(double[][] spectra)

Description copied from interface: SpectralUnmixing

Performs a linear spectral unmixing of a set of spectra.

Specified by:

unmix in interface SpectralUnmixing

Parameters:

spectra - the spectra, where number of rows = number of spectral channels number of cols = number of spectra

Returns:

the abundances, where number of rows = number of endmembers number of cols = number of spectra

mix

public double[][] mix(double[][] abundances)

Description copied from interface: SpectralUnmixing

Calculates the spectra for a set of abundances.

Specified by:

mix in interface SpectralUnmixing

Parameters:

abundances - the abundances, where number of rows = number of endmembers number of cols = number of spectra

Returns:

the resulting spectra, where number of rows = number of spectral channels number of cols = number of spectra