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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.
Constructor Summary | |
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ByteLookupTable(int offset, byte[] data) Constructs a ByteLookupTable object from an array of bytes representing a lookup table to be applied to all bands. |
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ByteLookupTable(int offset, byte[][] data) Constructs a ByteLookupTable object from an array of byte arrays representing a lookup table for each band. |
Method Summary | |
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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.awt.image.LookupTable |
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getNumComponents, getOffset, lookupPixel |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ByteLookupTable(int offset, byte[] data)
offset
- the value subtracted from the input values
before indexing into the arraydata
- an array of bytespublic ByteLookupTable(int offset, byte[][] data)
offset
- the value subtracted from the input values
before indexing into the arraysdata
- an array of byte arrays representing a lookup
table for each bandMethod Detail |
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public final byte[][] getTable()
ByteLookupTable
.public byte[] lookupPixel(byte[] src, byte[] dst)
dst
is returned.
src
- the source array.dst
- the destination array. This array must be at least as
long as src
. If dst
is
null
, a new array will be allocated having the
same length as src
.dst
, an int
array of
samples.public int[] lookupPixel(int[] src, int[] dst)
dst
is returned.
lookupPixel
in class LookupTable
src
- the source array.dst
- the destination array. This array must be at least as
long as src
. If dst
is
null
, a new array will be allocated having the
same length as src
.dst
, an int
array of
samples.
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