LookupTablepublic abstract class LookupTable extends Object | This abstract class defines a lookup table object. ByteLookupTable
and ShortLookupTable are subclasses, which
contain byte and short data, respectively. A lookup table
contains data arrays for one or more bands (or components) of an image
(for example, separate arrays for R, G, and B),
and it contains an offset which will be subtracted from the
input values before indexing into 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. All arrays must be the
same size. |
| Fields Summary |
|---|
| int | numComponentsConstants | | int | offset | | int | numEntries |
| Constructors Summary |
|---|
protected LookupTable(int offset, int numComponents)Constructs a new LookupTable from the number of components and an offset
into the lookup table.
if (offset < 0) {
throw new
IllegalArgumentException("Offset must be greater than 0");
}
if (numComponents < 1) {
throw new IllegalArgumentException("Number of components must "+
" be at least 1");
}
this.numComponents = numComponents;
this.offset = offset;
|
| Methods Summary |
|---|
| public int | getNumComponents()Returns the number of components in the lookup table.
return numComponents;
| | public int | getOffset()Returns the offset.
return offset;
| | public abstract int[] | lookupPixel(int[] src, int[] dest)Returns an int array of components for
one pixel. The dest array contains the
result of the lookup and is returned. If dest is
null, a new array is allocated. The
source and destination can be equal.
|
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