org.gridfour.lsop

Class LsOptimalPredictor08

java.lang.Object

org.gridfour.lsop.LsOptimalPredictor08

public class LsOptimalPredictor08
extends Object

Applies the methods of Lewis and Smith (1994) using optimal predictors for data compression.

The method used for this class is based on the PDF document: Lewis, M. and Smith, D. H. (1994). "Optimal Predictors for the Data Compression of Digital Elevation Models using the Method of Lagrange Multipliers"

Constructor Summary

Constructors

Constructor and Description
LsOptimalPredictor08()

Method Summary

Modifier and Type	Method and Description
double[]	computeCoefficients(int nRows, int nColumns, int[] values) Computes the coefficients for an optimal predictor.

Methods inherited from class java.lang.Object

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

Constructor Detail

LsOptimalPredictor08

public LsOptimalPredictor08()

Method Detail

computeCoefficients

public double[] computeCoefficients(int nRows,
                                    int nColumns,
                                    int[] values)

Computes the coefficients for an optimal predictor. In the unusual case that no solution is available, or that the input data size is inadequate, a null value will be returned. The layout of the coefficients is as shown below

    row i:      u3   u0   S(i,j)
    row i-1:    u4   u1   u2
    row i-2:    u5   u6   u7
 

Parameters:

nRows - a value of 4 or greater

nColumns - a value of 4 or greater

values - an array of values given in row-major order.

Returns:

if successful, an valid array; otherwise, null.