Class T4AndT6Compression
- java.lang.Object
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- org.apache.commons.imaging.common.itu_t4.T4AndT6Compression
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public final class T4AndT6Compression extends Object
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static byte[]
compressModifiedHuffman(byte[] uncompressed, int width, int height)
Compressed with the "Modified Huffman" encoding of section 10 in the TIFF6 specification.static byte[]
compressT4_1D(byte[] uncompressed, int width, int height, boolean hasFill)
static byte[]
compressT4_2D(byte[] uncompressed, int width, int height, boolean hasFill, int parameterK)
static byte[]
compressT6(byte[] uncompressed, int width, int height)
static byte[]
decompressModifiedHuffman(byte[] compressed, int width, int height)
Decompresses the "Modified Huffman" encoding of section 10 in the TIFF6 specification.static byte[]
decompressT4_1D(byte[] compressed, int width, int height, boolean hasFill)
Decompresses T.4 1D encoded data.static byte[]
decompressT4_2D(byte[] compressed, int width, int height, boolean hasFill)
Decompressed T.4 2D encoded data.static byte[]
decompressT6(byte[] compressed, int width, int height)
Decompress T.6 encoded data.
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Field Detail
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WHITE
public static final int WHITE
- See Also:
- Constant Field Values
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BLACK
public static final int BLACK
- See Also:
- Constant Field Values
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Method Detail
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compressModifiedHuffman
public static byte[] compressModifiedHuffman(byte[] uncompressed, int width, int height) throws ImageWriteException
Compressed with the "Modified Huffman" encoding of section 10 in the TIFF6 specification. No EOLs, no RTC, rows are padded to end on a byte boundary.- Parameters:
uncompressed
- uncompressed byte datawidth
- image widthheight
- image height- Returns:
- the compressed data
- Throws:
ImageWriteException
- if it fails to write the compressed data
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decompressModifiedHuffman
public static byte[] decompressModifiedHuffman(byte[] compressed, int width, int height) throws ImageReadException
Decompresses the "Modified Huffman" encoding of section 10 in the TIFF6 specification. No EOLs, no RTC, rows are padded to end on a byte boundary.- Parameters:
compressed
- compressed byte datawidth
- image widthheight
- image height- Returns:
- the compressed data
- Throws:
ImageReadException
- if it fails to read the compressed data
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compressT4_1D
public static byte[] compressT4_1D(byte[] uncompressed, int width, int height, boolean hasFill) throws ImageWriteException
- Throws:
ImageWriteException
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decompressT4_1D
public static byte[] decompressT4_1D(byte[] compressed, int width, int height, boolean hasFill) throws ImageReadException
Decompresses T.4 1D encoded data. EOL at the beginning and after each row, can be preceded by fill bits to fit on a byte boundary, no RTC.- Parameters:
compressed
- compressed byte datawidth
- image widthheight
- image heighthasFill
- used to check the end of line- Returns:
- the decompressed data
- Throws:
ImageReadException
- if it fails to read the compressed data
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compressT4_2D
public static byte[] compressT4_2D(byte[] uncompressed, int width, int height, boolean hasFill, int parameterK) throws ImageWriteException
- Throws:
ImageWriteException
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decompressT4_2D
public static byte[] decompressT4_2D(byte[] compressed, int width, int height, boolean hasFill) throws ImageReadException
Decompressed T.4 2D encoded data. EOL at the beginning and after each row, can be preceded by fill bits to fit on a byte boundary, and is succeeded by a tag bit determining whether the next line is encoded using 1D or 2D. No RTC.- Parameters:
compressed
- compressed byte datawidth
- image widthheight
- image heighthasFill
- used to check the end of line- Returns:
- the decompressed data
- Throws:
ImageReadException
- if it fails to read the compressed data
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compressT6
public static byte[] compressT6(byte[] uncompressed, int width, int height) throws ImageWriteException
- Throws:
ImageWriteException
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decompressT6
public static byte[] decompressT6(byte[] compressed, int width, int height) throws ImageReadException
Decompress T.6 encoded data. No EOLs, except for 2 consecutive ones at the end (the EOFB, end of fax block). No RTC. No fill bits anywhere. All data is 2D encoded.- Parameters:
compressed
- compressed byte datawidth
- image widthheight
- image height- Returns:
- the decompressed data
- Throws:
ImageReadException
- if it fails to read the compressed data
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