Package adams.data.io.input.foss

Class FossStdise

java.lang.Object

adams.data.io.input.foss.FossStdise

public class FossStdise
extends Object

Load, and perform standardisation/unstandardisation from foss standardisation file NOTE: Only does slope and intercept standardisation NOTE 2: Established by looking at .std files with hex editor. Use with caution

Version:

$Revision: 2237 $

Author:

dale

Field Summary

Fields

Modifier and Type	Field	Description
protected static int	datapoint_offset	number of wavelengths.
protected static int	delta_offset_1segment
protected static int	delta_offset_2segments	start of intercepts.
protected int	m_num_points	number of wavelengths.
protected static int	segments_offset	start of segment data.

Constructor Summary

Constructors

Constructor	Description
FossStdise(byte[] bytes)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected int	byte2UByte(byte by)	Convert byte to unsigned byte.
protected long	convertToLong(byte[] b, int offset)	Convert 4 bytes to long.
int	getCoefficientOffset()	Get start of coefficents.
double[]	getCoefficients()	Get coefficients as array.
double[]	getDataFromOffset(int i)	Get array of values starting from given offset.
int	getDeltaOffset()	Get start of intercept data.
static byte[]	getFileAsBytes(File f)	Get array of bytes from file.
double[]	getIntercepts()	Get intercepts as array.
int	getNumDatapoints()	Get number of nir wavelengths.
int	getSegmentsOffset()	Get start of segments data.
double[]	getSegs()	Get segments as array.
String	iee754Dump(double[] bytes)	Testing: Dump array is iee754 encoded ints.
protected long	longFrom2Bytes(byte[] b, int offset)	Get long from 2 bytes LSByte first.
static void	main(String[] args)	TEST args0 foss std file to read.
String	rawDump(double[] bytes)	Testing: output raw bytes.
static double[]	standardise(double[] input, FossStdise fs)	standardise nir data according to coefficients and intercepts taken from .std file.
static double[]	unstandardise(double[] input, FossStdise fs)	Unstandardise nir data according to coefficients and intercepts taken from .std file.

Methods inherited from class java.lang.Object

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

Field Detail

datapoint_offset

protected static int datapoint_offset

number of wavelengths.

segments_offset

protected static int segments_offset

start of segment data.

delta_offset_2segments

protected static int delta_offset_2segments

start of intercepts.

delta_offset_1segment

protected static int delta_offset_1segment

m_num_points

protected int m_num_points

number of wavelengths.

Constructor Detail

FossStdise

public FossStdise(byte[] bytes)

Constructor.

Parameters:

bytes - byte array of .std file

Method Detail

getSegmentsOffset

public int getSegmentsOffset()

Get start of segments data.

Returns:

segments start

getDeltaOffset

public int getDeltaOffset()

Get start of intercept data.

Returns:

intercept start

rawDump

public String rawDump(double[] bytes)

Testing: output raw bytes.

Parameters:

bytes -

Returns:

iee754Dump

public String iee754Dump(double[] bytes)

Testing: Dump array is iee754 encoded ints.

Parameters:

bytes -

Returns:

getCoefficientOffset

public int getCoefficientOffset()

Get start of coefficents.

Returns:

coefficient offset

getDataFromOffset

public double[] getDataFromOffset(int i)

Get array of values starting from given offset. Size is number of wavelengths

Parameters:

i - start from

Returns:

double array

standardise

public static double[] standardise(double[] input,
                                   FossStdise fs)

standardise nir data according to coefficients and intercepts taken from .std file.

Parameters:

input - byte array to standardise

fs - FossStdise

Returns:

standardised data

unstandardise

public static double[] unstandardise(double[] input,
                                     FossStdise fs)

Unstandardise nir data according to coefficients and intercepts taken from .std file.

Parameters:

input - byte array to unstandardise

fs - FossStdise

Returns:

unstandardised data

getFileAsBytes

public static byte[] getFileAsBytes(File f)

Get array of bytes from file.

Parameters:

f - file

Returns:

byte array

getCoefficients

public double[] getCoefficients()

Get coefficients as array.

Returns:

coefficients

getIntercepts

public double[] getIntercepts()

Get intercepts as array.

Returns:

intercepts

getSegs

public double[] getSegs()

Get segments as array. TODO: Not currently processed!!

Returns:

segments array

getNumDatapoints

public int getNumDatapoints()

Get number of nir wavelengths.

Returns:

num wavelengths

byte2UByte

protected int byte2UByte(byte by)

Convert byte to unsigned byte.

Parameters:

by - byte

Returns:

unsigned byte

convertToLong

protected long convertToLong(byte[] b,
                             int offset)

Convert 4 bytes to long. LSByte first

Parameters:

b - byte array

offset - starting pos

Returns:

long

longFrom2Bytes

protected long longFrom2Bytes(byte[] b,
                              int offset)

Get long from 2 bytes LSByte first.

Parameters:

b - byte array

offset - start in array

Returns:

long

main

public static void main(String[] args)
                 throws Exception

TEST args0 foss std file to read.

Parameters:

args - commandline arguments

Throws:

Exception - if something goes wrong