loci.formats
Class Compression

java.lang.Object
  loci.formats.Compression

public abstract class Compression

extends Object

A utility class for handling various compression types.

Field Summary

protected static int	CLEAR_CODE
protected static int	CODE
protected static int	DATA
protected static int	EOI_CODE
protected static int	RAW
protected static int	RUN
protected static int	SKIP_THREE
protected static int	SKIP_TWO
protected static int	THREE_BIT_DELTAS
protected static int	TWO_BIT_DELTAS

Constructor Summary

Compression()

Method Summary

static byte[]	deflateUncompress(byte[] input) Decodes an Adobe Deflate (Zip) compressed image strip.
static byte[]	lzwCompress(byte[] input) Encodes an image strip using the LZW compression method.
static byte[]	lzwUncompress(byte[] input) Decodes an LZW-compressed image strip.
static byte[]	packBitsUncompress(byte[] input) Decodes a PackBits (Macintosh RLE) compressed image.

Methods inherited from class java.lang.Object

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

Field Detail

CLEAR_CODE

protected static final int CLEAR_CODE

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Constant Field Values

EOI_CODE

protected static final int EOI_CODE

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Constant Field Values

DATA

protected static final int DATA

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Constant Field Values

CODE

protected static final int CODE

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Constant Field Values

RUN

protected static final int RUN

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Constant Field Values

TWO_BIT_DELTAS

protected static final int TWO_BIT_DELTAS

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Constant Field Values

SKIP_TWO

protected static final int SKIP_TWO

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Constant Field Values

THREE_BIT_DELTAS

protected static final int THREE_BIT_DELTAS

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Constant Field Values

SKIP_THREE

protected static final int SKIP_THREE

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Constant Field Values

RAW

protected static final int RAW

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Constant Field Values

Constructor Detail

Compression

public Compression()

Method Detail

lzwCompress

public static byte[] lzwCompress(byte[] input)

Encodes an image strip using the LZW compression method. Adapted from the TIFF 6.0 Specification: http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf (page 61)

deflateUncompress

public static byte[] deflateUncompress(byte[] input)
                                throws FormatException

Decodes an Adobe Deflate (Zip) compressed image strip.

Throws:

FormatException

packBitsUncompress

public static byte[] packBitsUncompress(byte[] input)

Decodes a PackBits (Macintosh RLE) compressed image. Adapted from the TIFF 6.0 specification, page 42.

lzwUncompress

public static byte[] lzwUncompress(byte[] input)
                            throws FormatException

Decodes an LZW-compressed image strip. Adapted from the TIFF 6.0 Specification: http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf (page 61)

Throws:

FormatException