Package com.jhlabs.image

Class OctTreeQuantizer

  • All Implemented Interfaces:
    Quantizer
    public class OctTreeQuantizer
extends java.lang.Object
implements Quantizer
    An image Quantizer based on the Octree algorithm. This is a very basic implementation at present and could be much improved by picking the nodes to reduce more carefully (i.e. not completely at random) when I get the time.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addPixels​(int[] pixels, int offset, int count)
      Add pixels to the quantizer.
      int[] buildColorTable()
      Build the color table.
      void buildColorTable​(int[] inPixels, int[] table)
      A quick way to use the quantizer.
      int getIndexForColor​(int rgb)
      Get the color table index for a color.
      void setup​(int numColors)
      Initialize the quantizer.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • OctTreeQuantizer

        public OctTreeQuantizer()

    • Method Detail

      • setup

        public void setup​(int numColors)
        Initialize the quantizer. This should be called before adding any pixels.
        Specified by:
        setup in interface Quantizer
        Parameters:
        numColors - the number of colors we're quantizing to.

      • addPixels

        public void addPixels​(int[] pixels,
                      int offset,
                      int count)
        Add pixels to the quantizer.
        Specified by:
        addPixels in interface Quantizer
        Parameters:
        pixels - the array of ARGB pixels
        offset - the offset into the array
        count - the count of pixels

      • getIndexForColor

        public int getIndexForColor​(int rgb)
        Get the color table index for a color.
        Specified by:
        getIndexForColor in interface Quantizer
        Parameters:
        rgb - the color
        Returns:
        the index

      • buildColorTable

        public int[] buildColorTable()
        Build the color table.
        Specified by:
        buildColorTable in interface Quantizer
        Returns:
        the color table

      • buildColorTable

        public void buildColorTable​(int[] inPixels,
                            int[] table)
        A quick way to use the quantizer. Just create a table the right size and pass in the pixels.
        Parameters:
        inPixels - the input colors
        table - the output color table