Class LookupTable

java.lang.Object
java.awt.image.LookupTable
Direct Known Subclasses:
ByteLookupTable, ShortLookupTable
public 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.
See Also:

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    LookupTable(int offset, int numComponents)
    Constructs a new LookupTable from the number of components and an offset into the lookup table.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getNumComponents()
    Returns the number of components in the lookup table.
    int
    getOffset()
    Returns the offset.
    abstract int[]
    lookupPixel(int[] src, int[] dest)
    Returns an int array of components for one pixel.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Creates and returns a copy of this object.
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Finalization is deprecated and subject to removal in a future release.
    final Class<?>
    getClass()
    Returns the runtime class of this Object.
    int
    hashCode()
    Returns a hash code value for this object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
    final void
    wait(long timeoutMillis)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
    final void
    wait(long timeoutMillis, int nanos)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

  • Constructor Details

    • LookupTable

      protected LookupTable(int offset, int numComponents)
      Constructs a new LookupTable from the number of components and an offset into the lookup table.
      Parameters:
      offset - the offset to subtract from input values before indexing into the data arrays for this LookupTable
      numComponents - the number of data arrays in this LookupTable
      Throws:
      IllegalArgumentException - if offset is less than 0 or if numComponents is less than 1

  • Method Details

    • getNumComponents

      public int getNumComponents()
      Returns the number of components in the lookup table.
      Returns:
      the number of components in this LookupTable.

    • getOffset

      public int getOffset()
      Returns the offset.
      Returns:
      the offset of this LookupTable.

    • lookupPixel

      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.
      Parameters:
      src - the source array of components of one pixel
      dest - the destination array of components for one pixel, translated with this LookupTable
      Returns:
      an int array of components for one pixel.