org.esa.beam.util.math
Class UnconstrainedLSU

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

All Implemented Interfaces:

SpectralUnmixing

Direct Known Subclasses:

ConstrainedLSU

public class UnconstrainedLSU
extends Object
implements SpectralUnmixing

Performs an unconstrained linear spectral unmixing.

Since:

4.1

Version:

$Revision$ $Date$

Author:

Ralf Quast, Helmut Schiller (GKSS)

Constructor Summary

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

Method Summary

double[][]	getEndmembers() Returns the endmembers.
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

UnconstrainedLSU

public UnconstrainedLSU(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

getEndmembers

public double[][] getEndmembers()

Returns the endmembers.

Returns:

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

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