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| java.lang.Object
 java.awt.image.LookupTable
java.awt.image.ByteLookupTable
| ByteLookupTable | | public class ByteLookupTable extends LookupTable (Code) | | 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
See Also: LookupOp
version:
10 Feb 1997 |
| Constructor Summary | |
| public | ByteLookupTable(int offset, byte data)
Constructs a ByteLookupTable object from an array of byte
arrays representing a lookup table for each
band. | | public | ByteLookupTable(int offset, byte data)
Constructs a ByteLookupTable object from an array
of bytes representing a lookup table to be applied to all
bands. |
| Method Summary | |
| final public byte[][] | getTable()
Returns the lookup table data by reference. | | public int[] | lookupPixel(int[] src, int[] dst)
Returns an array of samples of a pixel, translated with the lookup
table. | | public byte[] | lookupPixel(byte[] src, byte[] dst)
Returns an array of samples of a pixel, translated with the lookup
table. |
| data | | byte data(Code) | | Constants
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| ByteLookupTable | | public ByteLookupTable(int offset, byte data)(Code) | | 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.
Parameters:
offset - the value subtracted from the input values before indexing into the arrays
Parameters:
data - an array of byte arrays representing a lookuptable for each band
throws:
IllegalArgumentException - if offset isis less than 0 or if the length of datais less than 1 |
| ByteLookupTable | | public ByteLookupTable(int offset, byte data)(Code) | | Constructs a ByteLookupTable object from an array
of bytes representing a lookup table to be applied to all
bands. The offset will be subtracted from input
values before indexing into the array.
The data array is stored as a reference.
Parameters:
offset - the value subtracted from the input valuesbefore indexing into the array
Parameters:
data - an array of bytes
throws:
IllegalArgumentException - if offset isis less than 0 or if the length of datais less than 1 |
| getTable | | final public byte[][] getTable()(Code) | | 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.
the data array of this ByteLookupTable. |
| lookupPixel | | public int[] lookupPixel(int[] src, int[] dst)(Code) | | Returns an array of samples of a pixel, translated with the lookup
table. The source and destination array can be the same array.
Array dst is returned.
Parameters:
src - the source array.
Parameters:
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. the array dst, an int array of samples.
exception:
ArrayIndexOutOfBoundsException - if src is longer than dst or if for any element i of src, src[i]-offset is either less than zero or greater than or equal to the length of the lookup table for any band. |
| lookupPixel | | public byte[] lookupPixel(byte[] src, byte[] dst)(Code) | | Returns an array of samples of a pixel, translated with the lookup
table. The source and destination array can be the same array.
Array dst is returned.
Parameters:
src - the source array.
Parameters:
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. the array dst, an int array of samples.
exception:
ArrayIndexOutOfBoundsException - if src is longer than dst or if for any element i of src, (src[i]&0xff)-offset is either less than zero or greater than or equal to the length of the lookup table for any band. |
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