JIU 0.14.3

net.sourceforge.jiu.color.quantization
Class RGBColorList

java.lang.Object
  extended by net.sourceforge.jiu.color.quantization.RGBColorList
All Implemented Interfaces:
RGBIndex

public class RGBColorList
extends Object
implements RGBIndex

Holds an array of RGBColor objects.

Author:
Marco Schmidt

Field Summary
 
Fields inherited from interface net.sourceforge.jiu.data.RGBIndex
INDEX_BLUE, INDEX_GREEN, INDEX_RED
 
Constructor Summary
RGBColorList(Histogram3D hist)
          Creates a new list and initializes it with the argument histogram.
 
Method Summary
 int[] findExtrema(int i1, int i2)
          In a given interval of the list this method searches for the color axis that has the largest distribution of values.
 RGBColor getColor(int index)
          Returns an RGBColor object from this list, given by its zero-based index value.
 int getNumEntries()
          Returns the number of color objects in this list.
 void sortByAxis(int index1, int index2, int axis)
          Sorts an interval of the array of colors by one of the three components (RGB).
 void sortByCounter(int index1, int index2)
          Sorts an interval of the array of colors by their counters.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RGBColorList

public RGBColorList(Histogram3D hist)
Creates a new list and initializes it with the argument histogram. All values from the histogram with a counter larger than zero will be added to the list (which will include all colors that appear at least once in the image on which the histogram was created).

Parameters:
hist - the histogram from which the list will be initialized
Throws:
IllegalArgumentException - thrown if no histogram entry has a non-zero counter
Method Detail

findExtrema

public int[] findExtrema(int i1,
                         int i2)
In a given interval of the list this method searches for the color axis that has the largest distribution of values. Returns a pair of int values; the first value is the component (0, 1 or 2), the second value is the difference between the minimum and maximum value found in the list. Only checks colors from index i1 to i2 of the list.


getColor

public RGBColor getColor(int index)
Returns an RGBColor object from this list, given by its zero-based index value.

Parameters:
index - zero-based index into the list; must be smaller than getNumEntries()
Returns:
the color object

getNumEntries

public int getNumEntries()
Returns the number of color objects in this list.

Returns:
number of colors in the list

sortByAxis

public void sortByAxis(int index1,
                       int index2,
                       int axis)
Sorts an interval of the array of colors by one of the three components (RGB).

Parameters:
index1 - the index of the first element in the interval
index2 - the index of the last element in the interval
axis - the color component by which the interval is to be sorted, RGBIndex.INDEX_RED, RGBIndex.INDEX_GREEN or RGBIndex.INDEX_BLUE

sortByCounter

public void sortByCounter(int index1,
                          int index2)
Sorts an interval of the array of colors by their counters.

Parameters:
index1 - the index of the first element in the interval
index2 - the index of the last element in the interval

JIU 0.14.3

Copyright © 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Marco Schmidt