org.esa.beam.util.math
Class ConstrainedLSU

java.lang.Object
  org.esa.beam.util.math.UnconstrainedLSU
      org.esa.beam.util.math.ConstrainedLSU

All Implemented Interfaces:

SpectralUnmixing

public class ConstrainedLSU
extends UnconstrainedLSU

Performs a constrained linear spectral unmixing, where the sum of abundances always is equal to unity.

Since:

4.1

Version:

$Revision$ $Date$

Author:

Ralf Quast, Helmut Schiller (GKSS)

Constructor Summary

ConstrainedLSU(double[][] endmembers)
Constructs a new instance of this class.

Method Summary

double[][]

unmix(double[][] spectra) Performs a linear spectral unmixing of a set of spectra.

Methods inherited from class org.esa.beam.util.math.UnconstrainedLSU

getEndmembers, mix

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstrainedLSU

public ConstrainedLSU(double[][] endmembers)

Constructs a new instance of this class.

Parameters:

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

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

Overrides:

unmix in class UnconstrainedLSU

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