Class java.awt.image.ByteLookupTable
java.lang.Object
|
+--java.awt.image.LookupTable
|
+--java.awt.image.ByteLookupTable
- public class ByteLookupTable
- extends LookupTable
This class defines a lookup table object. The output of a
lookup operation using an object of this class is interpreted
as an unsigned byte quantity. The lookup table contains byte
data arrays for one or more bands (or components) of an image,
and it contains an offset which will be subtracted from the
input values before indexing the arrays. This allows an array
smaller than the native data size to be provided for a
constrained input. If there is only one array in the lookup
table, it will be applied to all bands.
- See Also:
ShortLookupTable
,
LookupOp
Constructor Summary
|
ByteLookupTable(int offset,
byte[] data)
Constructs a ByteLookupTable object from an array
of bytes representing a lookup table for each
band. |
ByteLookupTable(int offset,
byte[][] data)
Constructs a ByteLookupTable object from an array of byte
arrays representing a lookup table for each
band. |
Method Summary
|
byte[][]
|
getTable()
Returns the lookup table data by reference. |
byte[]
|
lookupPixel(byte[] src,
byte[] dst)
Returns an array of samples of a pixel, translated with the lookup
table. |
int[]
|
lookupPixel(int[] src,
int[] dst)
Returns an array of samples of a pixel, translated with the lookup
table. |
Methods inherited from class java.lang.Object |
clone
, equals
, finalize
, getClass
, hashCode
, notify
, notifyAll
, toString
, wait
, wait
, wait
|
ByteLookupTable
public ByteLookupTable(int offset,
byte[][] data)
- Constructs a ByteLookupTable object from an array of byte
arrays representing a lookup table for each
band. The offset will be subtracted from input
values before indexing into the arrays. The number of
bands is the length of the data argument. The
data array for each band is stored as a reference.
ByteLookupTable
public ByteLookupTable(int offset,
byte[] data)
- Constructs a ByteLookupTable object from an array
of bytes representing a lookup table for each
band. The offset will be subtracted from input
values before indexing into the array.
The data array is stored as a reference.
getTable
public final byte[][] getTable()
- Returns the lookup table data by reference. If this ByteLookupTable
was constructed using a single byte array, the length of the returned
array is one.
- Returns:
- ByteLookupTable data array.
lookupPixel
public int[] lookupPixel(int[] src,
int[] dst)
- Returns an array of samples of a pixel, translated with the lookup
table. The source and destination arrays can be the same. The dst
array is returned. If dst is null, a new array will be allocated.
- Returns:
- an int array of samples.
- Overrides:
- lookupPixel in class LookupTable
lookupPixel
public byte[] lookupPixel(byte[] src,
byte[] dst)
- Returns an array of samples of a pixel, translated with the lookup
table. The source and destination arrays can be the same. The dst
array is returned. If dst is null, a new array will be allocated.
The source byte data is interpreted to as unsigned data so it will be
ANDed with 0xff before it is used to index into the lookup table.
- Returns:
- a byte array of samples.
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