skyview.geometry.projecter

Class Interleave

java.lang.Object

skyview.geometry.projecter.Interleave

public class Interleave
extends java.lang.Object

This class implements bit interleaving for two-d images. The pixel and indices methods are complementary enabling users to transform between a scalar bit-interleaved index and a set of normal array indices.

Constructor Summary

Constructors

Constructor and Description
Interleave() Create a default interleaver with that can handle 512x512 images in a single iteration.
Interleave(int order) Create an interleaver with a specified buffer size for the array lookups.

Method Summary

Modifier and Type	Method and Description
long	ImgToRing(long pix, int size) Given the index in natural image order (y*nx+x), get the nested index.
int[]	indices(long pixel) Separate interleaved pixels bits into the x and y values.
static void	main(java.lang.String[] args)
long	pixel(int x, int y)
int	quickImgToRing(int pix) This method can only be used if the dimension exactly matches the order for the Interleave.
int	quickRingToImg(int pix) This method can only be used if the Interleave order exactly matches the dimesion of the image.
long	ringToImg(long pix, int size) Given an a pixel with an interleaved index.

Methods inherited from class java.lang.Object

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

Constructor Detail

Interleave

public Interleave(int order)

Create an interleaver with a specified buffer size for the array lookups. The interleaver will be able to handle large interleaves but will break them up into bit strings of the specified order length.

Parameters:

order - The number of bits in to be [de]interleaved in an iteration.

Interleave

public Interleave()

Create a default interleaver with that can handle 512x512 images in a single iteration.

Method Detail

pixel

public long pixel(int x,
                  int y)

indices

public int[] indices(long pixel)

Separate interleaved pixels bits into the x and y values.

Parameters:

pixel -

Returns:

ringToImg

public long ringToImg(long pix,
                      int size)

Given an a pixel with an interleaved index. return the index into the image as if it simply indexed in natural image order (y*nx+x)

Parameters:

pix -

size -

Returns:

quickRingToImg

public int quickRingToImg(int pix)

This method can only be used if the Interleave order exactly matches the dimesion of the image. E.g., if our tiles have 512x512 pixels then the order must be 9.

Parameters:

pix -

Returns:

ImgToRing

public long ImgToRing(long pix,
                      int size)

Given the index in natural image order (y*nx+x), get the nested index.

quickImgToRing

public int quickImgToRing(int pix)

This method can only be used if the dimension exactly matches the order for the Interleave.

main

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

Throws:

java.lang.Exception