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()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • 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.