Various image processing operations. : Image « 2D Graphics GUI « Java






Various image processing operations.

Various image processing operations.
  
/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.awt.image.LookupOp;
import java.awt.image.RescaleOp;
import java.awt.image.ShortLookupTable;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileNameExtensionFilter;

/**
 * This program demonstrates various image processing operations.
 * @version 1.03 2007-08-16
 * @author Cay Horstmann
 */
public class ImageProcessingTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new Runnable()
         {
            public void run()
            {
               JFrame frame = new ImageProcessingFrame();
               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               frame.setVisible(true);
            }
         });
   }
}

/**
 * This frame has a menu to load an image and to specify various transformations, and a component to
 * show the resulting image.
 */
class ImageProcessingFrame extends JFrame
{
   public ImageProcessingFrame()
   {
      setTitle("ImageProcessingTest");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

      add(new JComponent()
         {
            public void paintComponent(Graphics g)
            {
               if (image != null) g.drawImage(image, 0, 0, null);
            }
         });

      JMenu fileMenu = new JMenu("File");
      JMenuItem openItem = new JMenuItem("Open");
      openItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               openFile();
            }
         });
      fileMenu.add(openItem);

      JMenuItem exitItem = new JMenuItem("Exit");
      exitItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               System.exit(0);
            }
         });
      fileMenu.add(exitItem);

      JMenu editMenu = new JMenu("Edit");
      JMenuItem blurItem = new JMenuItem("Blur");
      blurItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               float weight = 1.0f / 9.0f;
               float[] elements = new float[9];
               for (int i = 0; i < 9; i++)
                  elements[i] = weight;
               convolve(elements);
            }
         });
      editMenu.add(blurItem);

      JMenuItem sharpenItem = new JMenuItem("Sharpen");
      sharpenItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               float[] elements = { 0.0f, -1.0f, 0.0f, -1.0f, 5.f, -1.0f, 0.0f, -1.0f, 0.0f };
               convolve(elements);
            }
         });
      editMenu.add(sharpenItem);

      JMenuItem brightenItem = new JMenuItem("Brighten");
      brightenItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               float a = 1.1f;
               // float b = 20.0f;
               float b = 0;
               RescaleOp op = new RescaleOp(a, b, null);
               filter(op);
            }
         });
      editMenu.add(brightenItem);

      JMenuItem edgeDetectItem = new JMenuItem("Edge detect");
      edgeDetectItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               float[] elements = { 0.0f, -1.0f, 0.0f, -1.0f, 4.f, -1.0f, 0.0f, -1.0f, 0.0f };
               convolve(elements);
            }
         });
      editMenu.add(edgeDetectItem);

      JMenuItem negativeItem = new JMenuItem("Negative");
      negativeItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               short[] negative = new short[256 * 1];
               for (int i = 0; i < 256; i++)
                  negative[i] = (short) (255 - i);
               ShortLookupTable table = new ShortLookupTable(0, negative);
               LookupOp op = new LookupOp(table, null);
               filter(op);
            }
         });
      editMenu.add(negativeItem);

      JMenuItem rotateItem = new JMenuItem("Rotate");
      rotateItem.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               if (image == null) return;
               AffineTransform transform = AffineTransform.getRotateInstance(Math.toRadians(5),
                     image.getWidth() / 2, image.getHeight() / 2);
               AffineTransformOp op = new AffineTransformOp(transform,
                     AffineTransformOp.TYPE_BICUBIC);
               filter(op);
            }
         });
      editMenu.add(rotateItem);

      JMenuBar menuBar = new JMenuBar();
      menuBar.add(fileMenu);
      menuBar.add(editMenu);
      setJMenuBar(menuBar);
   }

   /**
    * Open a file and load the image.
    */
   public void openFile()
   {
      JFileChooser chooser = new JFileChooser();
      chooser.setCurrentDirectory(new File("."));
      String[] extensions = ImageIO.getReaderFileSuffixes();
      chooser.setFileFilter(new FileNameExtensionFilter("Image files", extensions));
      int r = chooser.showOpenDialog(this);
      if (r != JFileChooser.APPROVE_OPTION) return;

      try
      {
         Image img = ImageIO.read(chooser.getSelectedFile());
         image = new BufferedImage(img.getWidth(null), img.getHeight(null),
               BufferedImage.TYPE_INT_RGB);
         image.getGraphics().drawImage(img, 0, 0, null);
      }
      catch (IOException e)
      {
         JOptionPane.showMessageDialog(this, e);
      }
      repaint();
   }

   /**
    * Apply a filter and repaint.
    * @param op the image operation to apply
    */
   private void filter(BufferedImageOp op)
   {
      if (image == null) return;
      image = op.filter(image, null);
      repaint();
   }

   /**
    * Apply a convolution and repaint.
    * @param elements the convolution kernel (an array of 9 matrix elements)
    */
   private void convolve(float[] elements)
   {
      Kernel kernel = new Kernel(3, 3, elements);
      ConvolveOp op = new ConvolveOp(kernel);
      filter(op);
   }

   private BufferedImage image;
   private static final int DEFAULT_WIDTH = 400;
   private static final int DEFAULT_HEIGHT = 400;
}

   
    
  








Related examples in the same category

1.Image size Image size
2.Image demoImage demo
3.Getting the Color Model of an Image
4.Filtering the RGB Values in an Image
5.Create a filter that can modify any of the RGB pixel values in an image.
6.This filter removes all but the red values in an image
7.Load and draw image
8.Paint an IconPaint an Icon
9.Image Processing: Brightness and ContrastImage Processing: Brightness and Contrast
10.Image with mouse drag and move eventImage with mouse drag and move event
11.Image Animation and ThreadImage Animation and Thread
12.Image Color Gray EffectImage Color Gray Effect
13.Image BufferingImage Buffering
14.Image Effect: CombineImage Effect: Combine
15.AffineTransform demoAffineTransform demo
16.Image Effect: Rotate Image using DataBufferImage Effect: Rotate Image using DataBuffer
17.Image Effect: Sharpen, blurImage Effect: Sharpen, blur
18.Image scale
19.Image crop
20.Demonstrating the Drawing of an Image with a Convolve Operation
21.Demonstrating Use of the Image I/O Library
22.Adding Image-Dragging Behavior
23.Sending Image Objects through the ClipboardSending Image Objects through the Clipboard
24.Anti AliasAnti Alias
25.Image OperationsImage Operations
26.Image ViewerImage Viewer
27.Get the dimensions of the image; these will be non-negative
28.Standalone Image Viewer - works with any AWT-supported format
29.Toolkit.getImage() which works the same in either Applet or Application
30.Double Buffered Image
31.Graband Fade: displays image and fades to black
32.Graband Fade with Rasters
33.Rotate Image 45 Degrees
34.Convert java.awt.image.BufferedImage to java.awt.Image
35.Filter image by multiplier its red, green and blue color
36.Drags within the imageDrags within the image
37.TYPE_INT_RGB and TYPE_INT_ARGB are typically used
38.Pixels from a buffered image can be modified
39.Calculation of the mean value of an image with Raster
40.Use PixelGrabber class to acquire pixel data from an Image object
41.Flip an image
42.Rendered Image
43.Image Panel
44.Image Utils
45.Returns an image resource.
46.Create Gradient Image
47.Create Gradient Mask
48.Create Translucent Image
49.Make Raster Writable
50.A frame that displays an image
51.Optimized version of copyData designed to work on Integer packed data with a SinglePixelPackedSampleModel
52.This program demonstrates the transfer of images between a Java application and the system clipboard.This program demonstrates the transfer of images between a Java application and the system clipboard.
53.Scales down an image into a box of maxSideLenght x maxSideLength.
54.Adding watermark to an image
55.Scale Image
56.Crop Image
57.Fit Image
58.Converts a java.awt.Image into an array of pixels
59.Creates a scaled copy of the source image.
60.Provides useful methods for converting images from one colour depth to another.
61.Reads an image in a file and creates a thumbnail in another file.
62.Make image TransparencyMake image Transparency
63.Clips the input image to the specified shape
64.Image Sorter frame
65.Returns an ImageIcon, or null if the path was invalid.
66.Create new image from source image
67.check if image supported
68.Get supported image format
69.get image thumbnail
70.get image orientation type
71.get fixing preview image