stella.adapter
Class RectangularMatcher

java.lang.Object
  stella.adapter.RectangularMatcher

public class RectangularMatcher
extends Object

Nested Class Summary

static class	RectangularMatcher.FileMatch Test class to read image and catalog data from a file and try to match.
static class	RectangularMatcher.Thorough More ambitious test.

Field Summary

private List	catalog Pixel coordinates as deduced from the catalog.
private Point2D[][]	catalogdist Distance of star at first index to star on second, catalog space.
private static double	CATALOGRANGE The magnitude range in the catalog.
private double	delta The expected uncertainity of the catalog positions in pixels.
private double	deltamag The expected uncertainty in catalog to image magnitudes.
private List[]	freq For each star in the image the indices of the catalog matches.
private List	image Pixel coordinates of the stars on the image.
private Point2D[][]	imagedist Distance of star at first index to star on second, image space.
private List[]	match For each star in the image the indices of the catalog matches.

Constructor Summary

RectangularMatcher(List im, List cat)
Constructs a new rectangluar matcher and calculates all distances.

Method Summary

private static Point2D[][]	calcDistances(List pix) Calculates all distances between pixels.
Point2D	findMatches() Assumption: all the stars can be seen in the image can also be found in the catalog.
void	setDelta(double _deltaPix) Sets the expected uncertainty of the catalog plus image positions in pixels.
void	setDeltaMag(double dm) Sets the expected uncertainty of the catalog to image magnitudes.

Methods inherited from class java.lang.Object

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

Field Detail

image

private List image

Pixel coordinates of the stars on the image.

catalog

private List catalog

Pixel coordinates as deduced from the catalog.

imagedist

private Point2D[][] imagedist

Distance of star at first index to star on second, image space.

catalogdist

private Point2D[][] catalogdist

Distance of star at first index to star on second, catalog space.

delta

private double delta

The expected uncertainity of the catalog positions in pixels.

deltamag

private double deltamag

The expected uncertainty in catalog to image magnitudes.

match

private List[] match

For each star in the image the indices of the catalog matches.

freq

private List[] freq

For each star in the image the indices of the catalog matches.

CATALOGRANGE

private static final double CATALOGRANGE

The magnitude range in the catalog.

See Also:

Constant Field Values

Constructor Detail

RectangularMatcher

public RectangularMatcher(List im,
                          List cat)

Constructs a new rectangluar matcher and calculates all distances. Prior to matching, the uncertainty should be set.

Parameters:

im - The pixel x/y from the image, as Guiding.RawStar list.

cat - The pixel x/y list from the catalog.

Method Detail

calcDistances

private static final Point2D[][] calcDistances(List pix)

Calculates all distances between pixels.

setDelta

public void setDelta(double _deltaPix)

Sets the expected uncertainty of the catalog plus image positions in pixels. This uncertainty defines a match, see findMatches().

setDeltaMag

public void setDeltaMag(double dm)

Sets the expected uncertainty of the catalog to image magnitudes. Used to deal with multiple shifts.

findMatches

public Point2D findMatches()

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