sharpenfilter.java

来自「java 编程源代码」· Java 代码 · 共 47 行

// SharpenFilter.java
// SharpenFilter is an Java2DImageFilter that sharpens the edges 
// in a BufferedImage.
package com.deitel.advjhtp1.java2d;

// Java core packages
import java.awt.image.*;

public class SharpenFilter implements Java2DImageFilter {
   
   // apply edge-sharpening filter to BufferedImage
   public BufferedImage processImage( BufferedImage image ) 
   {
      // array used to detect edges in image
      float[] sharpenMatrix = {
         0.0f, -1.0f, 0.0f,
         -1.0f, 5.0f, -1.0f,
         0.0f, -1.0f, 0.0f };
                            
      // create filter to sharpen edges
      BufferedImageOp sharpenFilter = 
         new ConvolveOp( new Kernel( 3, 3, sharpenMatrix ), 
            ConvolveOp.EDGE_NO_OP, null );
      
      // apply sharpenFilter to displayImage
      return sharpenFilter.filter( image, null );
      
   } // end method processImage
}

/***************************************************************
 * (C) Copyright 2002 by Deitel & Associates, Inc. and         *
 * Prentice Hall. All Rights Reserved.                         *
 *                                                             *
 * DISCLAIMER: The authors and publisher of this book have     *
 * used their best efforts in preparing the book. These        *
 * efforts include the development, research, and testing of   *
 * the theories and programs to determine their effectiveness. *
 * The authors and publisher make no warranty of any kind,     *
 * expressed or implied, with regard to these programs or to   *
 * the documentation contained in these books. The authors     *
 * and publisher shall not be liable in any event for          *
 * incidental or consequential damages in connection with, or  *
 * arising out of, the furnishing, performance, or use of      *
 * these programs.                                             *
 ***************************************************************/