stella.adapter

Class StarRegister

java.lang.Object

stella.adapter.StarRegister

public class StarRegister
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
private double	deltaPix The expected uncertainity of the catalog positions in pixels.
private Point2D.Double[][]	dPolarDB Polar coordinates distances for each database stars with respect to all database stars.
private Point2D.Double[][]	dPolarIM Polar coordinates distances for each image stars with respect to all image stars.
private int[]	match Vector with nObj size holding the matched catalog star indexes for each object in the CCD image.
private int	nObj Number of objects found in the image;
private int	nRef Number of reference (catalog) stars found in the database.
private double[][]	xyDB 2D vector with the stars' X-Y pixels coordinates in the database.
private double[][]	xyIM 2D vector with the stars' X-Y pixels coordinates on the CCD image.

Constructor Summary

Constructors

Constructor and Description
StarRegister(double[][] _xyIM, double[][] _xyDB) Constructor.

Method Summary

Modifier and Type	Method and Description
private int	calcDistances() Calculates and stores the polar coordinate distances for each pairs of star in the CCD image and in the catalog.
int	findMatches() Assumption: all the stars can be seen in the image can also be found in the catalog.
double[]	getXYShift() Returns the average x-y shifts calculated from the star matches.
static void	main(String[] args) Test the class.
void	setDeltaPix(double _deltaPix) Sets the expected uncertainity of the catalog positions in pixels.

Methods inherited from class java.lang.Object

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

Field Detail

xyIM

private double[][] xyIM

2D vector with the stars' X-Y pixels coordinates on the CCD image.

xyDB

private double[][] xyDB

2D vector with the stars' X-Y pixels coordinates in the database.

dPolarIM

private Point2D.Double[][] dPolarIM

Polar coordinates distances for each image stars with respect to all image stars.

dPolarDB

private Point2D.Double[][] dPolarDB

Polar coordinates distances for each database stars with respect to all database stars.

nObj

private int nObj

Number of objects found in the image;

nRef

private int nRef

Number of reference (catalog) stars found in the database.

deltaPix

private double deltaPix

The expected uncertainity of the catalog positions in pixels. From this the maximum acceptable (polar coordinate) distance deviation for matching star pairs is calculated.

match

private int[] match

Vector with nObj size holding the matched catalog star indexes for each object in the CCD image. For the unmatched stars the index value is set to -1.

Constructor Detail

StarRegister

public StarRegister(double[][] _xyIM,
                    double[][] _xyDB)

Constructor. xyIM - 2D array with identified star coordinates ordered by magnitude. xyDB - 2D array with database star coordinates ordered by magnitude.

Method Detail

calcDistances

private int calcDistances()

Calculates and stores the polar coordinate distances for each pairs of star in the CCD image and in the catalog.

setDeltaPix

public void setDeltaPix(double _deltaPix)

Sets the expected uncertainity of the catalog positions in pixels. From this the maximum acceptable (polar coordinate) distance deviation for matching star pairs is calculated in findMatches.

findMatches

public int findMatches()

Assumption: all the stars can be seen in the image can also be found in the catalog.

getXYShift

public double[] getXYShift()

Returns the average x-y shifts calculated from the star matches.

main

public static void main(String[] args)

Test the class.