com.luciad.format.raster.reference

LuciadLightspeedClass TLcdTranslatedRasterReferencer

java.lang.Object

com.luciad.format.raster.reference.TLcdTranslatedRasterReferencer

All Implemented Interfaces:

ILcdRasterReferencer

public class TLcdTranslatedRasterReferencer
extends Object
implements ILcdRasterReferencer

This implementation of ILcdRasterReferencer computes axis-aligned raster bounds in the given model reference. This means that the raster is simply translated and scaled, based on a least squares approximation of the tie points, with a fixed scale.

If rotation is also required, this class can be chained to TLcdRotatedRasterReferencer. For instance:

 ILcdRasterReferencer referencer =
   new TLcdRotatedRasterReferencer(new TLcdTranslatedRasterReferencer());
 

Since:

8.1

Constructor Summary

Constructors

Constructor and Description
TLcdTranslatedRasterReferencer(double aScaleX, double aScaleY) Creates a new TLcdTranslatedRasterReferencer that will compute axis-aligned raster bounds based on a least squares approximation of the tie points and on a fixed scale.

Method Summary

Modifier and Type	Method and Description
ILcdRasterReference	createRasterReference(int aImageWidth, int aImageHeight, ILcdPoint[] aImageTiePoints, ILcdModelReference aModelReference, ILcdPoint[] aModelTiePoints, ILcdPoint[] aMappedModelTiePointsSFCT) Creates a raster reference for an image of a given size, based on pairs of tie points.

Methods inherited from class java.lang.Object

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

Constructor Detail

TLcdTranslatedRasterReferencer

public TLcdTranslatedRasterReferencer(double aScaleX,
                                      double aScaleY)

Creates a new TLcdTranslatedRasterReferencer that will compute axis-aligned raster bounds based on a least squares approximation of the tie points and on a fixed scale.

Parameters:

aScaleX - the scaling factor for going from the image ordinates to model ordinates on the x axis.

aScaleY - the scaling factor for going from the image ordinates to model ordinates on the y axis.

Method Detail

createRasterReference

public ILcdRasterReference createRasterReference(int aImageWidth,
                                                 int aImageHeight,
                                                 ILcdPoint[] aImageTiePoints,
                                                 ILcdModelReference aModelReference,
                                                 ILcdPoint[] aModelTiePoints,
                                                 ILcdPoint[] aMappedModelTiePointsSFCT)

Description copied from interface: ILcdRasterReferencer

Creates a raster reference for an image of a given size, based on pairs of tie points.

An optional array can be provided for obtaining the model tie points transformed to image coordinates on return. These reflect the effects of the referencing. The differences between the transformed model tie points (expressed in pixels) and the original image tie points (also expressed in pixels) provide a measure for the success of the referencing. With a perfect raster reference, the resulting model tie points correspond to the original image tie points.

Specified by:

createRasterReference in interface ILcdRasterReferencer

Parameters:

aImageWidth - the image width of the raster, expressed in pixels.

aImageHeight - the image height of the raster, expressed in pixels.

aImageTiePoints - the image tie points, expressed in pixels.

aModelReference - the reference of the model tie points.

aModelTiePoints - the model tie points corresponding to the image tie points, expressed in model coordinates.

aMappedModelTiePointsSFCT - an optional array for obtaining the the model tie points mapped to image coordinates upon return. This parameter may be null, if the mapped points are not required.

Returns:

a raster reference containing a new model reference and raster bounds that try to satisfy the given tie points.