Class CompressedImageData

java.lang.Object

nom.tam.fits.Data

nom.tam.fits.AbstractTableData

nom.tam.fits.BinaryTable

nom.tam.image.compression.hdu.CompressedImageData

All Implemented Interfaces:

FitsElement, TableData

public class CompressedImageData
extends BinaryTable

Nested Class Summary

Nested classes/interfaces inherited from class BinaryTable

BinaryTable.ColumnDesc, BinaryTable.SaveState

Field Summary

Fields

Modifier and Type	Field	Description
private TiledImageCompressionOperation	tiledImageOperation	tile information, only available during compressing or decompressing.

Fields inherited from class Data

dataSize, fileOffset, input

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CompressedImageData()
protected	CompressedImageData(Header hdr)

Method Summary

Modifier and Type	Method	Description
protected void	compress(CompressedImageHDU hdu)
void	fillHeader(Header h)	Update a FITS header to reflect the current state of the data.
protected void	forceNoLoss(int x, int y, int width, int heigth)
protected <T extends ICompressOption> T	getCompressOption(Class<T> clazz)
protected Buffer	getUncompressedData(Header hdr)
protected void	prepareUncompressedData(Object data, Header header)
protected void	preserveNulls(long nullValue, String compressionAlgorithm)	preserve the null values in the image even if the compression algorithm is lossy.
protected CompressedImageData	setAxis(int[] axes)
protected void	setCompressAlgorithm(HeaderCard compressAlgorithmCard)
protected void	setQuantAlgorithm(HeaderCard quantAlgorithmCard)
protected CompressedImageData	setTileSize(int... axes)
private TiledImageCompressionOperation	tiledImageOperation()

Methods inherited from class BinaryTable

addByteVaryingColumn, addColumn, addFlattenedColumn, addRow, createColumnDataFor, createColumnTable, deleteColumns, deleteRows, getBases, getColumn, getData, getDimens, getElement, getFlatColumns, getFlattenedColumn, getHeapOffset, getHeapSize, getModelRow, getNCols, getNRows, getRawElement, getRow, getSizes, getTDims, getTrueSize, getTypes, read, readHeap, readTrueData, setColumn, setElement, setFlattenedColumn, setRow, updateAfterDelete, validColumn, validRow, write

Methods inherited from class Data

getFileOffset, getKernel, getSize, reset, rewrite, rewriteable, setFileOffset

Methods inherited from class Object

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

Field Details

tiledImageOperation

private TiledImageCompressionOperation tiledImageOperation

tile information, only available during compressing or decompressing.

Constructor Details

CompressedImageData

protected CompressedImageData()

CompressedImageData

protected CompressedImageData(Header hdr)
                       throws FitsException

Throws:

FitsException

Method Details

fillHeader

public void fillHeader(Header h)
                throws FitsException

Description copied from class: BinaryTable

Update a FITS header to reflect the current state of the data. * @throws FitsException if the operation failed

Overrides:

fillHeader in class BinaryTable

Throws:

FitsException

tiledImageOperation

private TiledImageCompressionOperation tiledImageOperation()

compress

protected void compress(CompressedImageHDU hdu)
                 throws FitsException

Throws:

FitsException

forceNoLoss

protected void forceNoLoss(int x,
 int y,
 int width,
 int heigth)

getCompressOption

protected <T extends ICompressOption> T getCompressOption(Class<T> clazz)

getUncompressedData

protected Buffer getUncompressedData(Header hdr)
                              throws FitsException

Throws:

FitsException

prepareUncompressedData

protected void prepareUncompressedData(Object data,
 Header header)
                                throws FitsException

Throws:

FitsException

preserveNulls

protected void preserveNulls(long nullValue,
 String compressionAlgorithm)

preserve the null values in the image even if the compression algorithm is lossy.

Parameters:

nullValue - the value representing null for byte/short and integer pixel values

compressionAlgorithm - compression algorithm to use for the null pixel mask

setAxis

protected CompressedImageData setAxis(int[] axes)

setCompressAlgorithm

protected void setCompressAlgorithm(HeaderCard compressAlgorithmCard)

setQuantAlgorithm

protected void setQuantAlgorithm(HeaderCard quantAlgorithmCard)
                          throws FitsException

Throws:

FitsException

setTileSize

protected CompressedImageData setTileSize(int... axes)
                                   throws FitsException

Throws:

FitsException