import java.awt.Color;/** * An three-level gray-based threshold filter. *  * @author Michael Kolling and David J Barnes  * @version 1.0 */public class ThresholdFilter extends Filter{	/**	 * Constructor for objects of class ThresholdFilter.     * @param name The name of the filter.	 */	public ThresholdFilter(String name)    {        super(name);	}    /**     * Apply this filter to an image.     *      * @param  image  The image to be changed by this filter.     */    public void apply(OFImage image)    {        int height = image.getHeight();        int width = image.getWidth();        for(int y = 0; y < height; y++) {            for(int x = 0; x < width; x++) {                Color pixel = image.getPixel(x, y);                int brightness = (pixel.getRed() + pixel.getBlue() + pixel.getGreen()) / 3;                if(brightness <= 85) {                    image.setPixel(x, y, Color.BLACK);                }                else if(brightness <= 170) {                    image.setPixel(x, y, Color.GRAY);                }                else {                    image.setPixel(x, y, Color.WHITE);                }            }        }    }}