EAS - PBO - Membuat Image Editor
EAS - Pemrograman Berbasis Objek
Membuat Image Editor dengan menggunakan program BlueJ
Nama : Bastian Farandy
NRP : 05111740000190
Kelas : Pemrograman Berbasis Objek A
Soal :
setelah gambar di rotate
setelah gambar ditambah filter grayscale
setelah itu, gambar kembali di reset
Membuat Image Editor dengan menggunakan program BlueJ
Nama : Bastian Farandy
NRP : 05111740000190
Kelas : Pemrograman Berbasis Objek A
Soal :
Gambarkan rancangan interfacenya
Gambarkan dan jelaskan Class Diagram penyusun dari image viewer yang akan dibuat.
- ImageViewer
class yang mengatur tampilan dalam program, menerapkan filter-filter maupun fitur-fitur lainnya. Selain itu, class ini juga yang mengatur pengambilan file ke dalam program, serta untuk menyimpan file gambar yang telah dirubah dalam program. Selain itu, dalam ImageViewer ini terdapat beberapa fitur, seperti fitur untuk memutar gambar (rotate) dan fitur untuk mengembalikan gambar seperti semula setelah di edit (reset).
- Filter
class yang mengatur filter-filter lainnya, serta memanggil filter-filter lain seperti InvertFilter, MirrorFilter, maupun filter lainnya ketika class ImageViewer membutuhkan filter tersebut.
- ImageFileManager
class yang mengatur pengambilan file dari komputer menuju program, terutama yang mengatur file apa saja yang dapat dimasukkan ke dalam program (seperti file jpg, png, namun diluar kedua jenis file tersebut, maka file itu tidak dapat dimasukkan ke dalam program).
- ImagePanel
class yang berperan sebagai "canvas" dalam program. berfungsi untuk memanipulasi gambar yang dimasukkan ke dalam program dengan fitur-fitur lain, seperti efek filter dan lainnya
- OFImage
class yang berperan untuk memproses gambar setelah gambar di proses oleh ImagePanel serta dapat memanipulasi gambar baik dari segi warna, ukuran gambar, maupun lainnya
- SolarizeFilter
class yang berperan untuk membuat gambar memiliki efek warna yang negatif
- ThresholdFilter
class yang berperan untuk membuat gambar memiliki efek threshold
- InvertFilter
class yang berperan untuk membuat gambar memiliki efek inverted
- EdgeFilter
class yang berperan untuk mendeteksi edges dan menghighlightnya pada gambar
- PixelizeFilter
class yang berperan untuk memberi efek pixelated pada gambar
- MirrorFilter
class yang berperan untuk memberikan efek cermin pada gambar
- SmoothFilter
class yang berperan untuk menghaluskan gambar
- FishEyeFilter
class yang berperan untuk memberikan efek "fisheye" pada gambar
Implementasikan ke dalam program dan buat link nya di posting blog ini.
Screenshots
Tampilan Utama
Setelah ditambahkan gambar
setelah dibesarkan
setelah ditambah filter lighter
setelah ditambah filter threshold
setelah ditambah filter solarize
setelah itu, gambar di reset
setelah ditambah filter smooth
setelah ditambah filter pixelize
setelah ditambah filter mirror
setelah ditambah filter Edge Detection
setelah ditambah filter Fish Eye
setelah itu, gambar direset kembali
setelah gambar di rotate
setelah gambar ditambah filter grayscale
setelah itu, gambar kembali di reset
Source Code
ImageViewer
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;
import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
/**
* ImageViewer is the main class of the image viewer application. It builds and
* displays the application GUI and initialises all other components.
*
* To start the application, create an object of this class.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 3.1
*/
public class ImageViewer
{
// static fields:
private static final String VERSION = "Version 3.1";
private static JFileChooser fileChooser = new JFileChooser(System.getProperty("user.dir"));
// fields:
private JFrame frame;
private ImagePanel imagePanel;
private JLabel filenameLabel;
private JLabel statusLabel;
private JButton smallerButton;
private JButton largerButton;
private JButton DarkerButton;
private JButton LighterButton;
private JButton GrayScaleButton;
private JButton ScaleButton;
private JButton ScButton;
private JButton resetButton;
private OFImage currentImage;
private JButton rotateButton;
private File selectedFile;
private OFImage temp;
private List<Filter> filters;
/**
* Create an ImageViewer and display its GUI on screen.
*/
public ImageViewer()
{
currentImage = null;
filters = createFilters();
makeFrame();
}
// ---- implementation of menu functions ----
/**
* Open function: open a file chooser to select a new image file,
* and then display the chosen image.
*/
private void openFile()
{
int returnVal = fileChooser.showOpenDialog(frame);
if(returnVal != JFileChooser.APPROVE_OPTION) {
return; // cancelled
}
selectedFile = fileChooser.getSelectedFile();
currentImage = ImageFileManager.loadImage(selectedFile);
if(currentImage == null) { // image file was not a valid image
JOptionPane.showMessageDialog(frame,
"The file was not in a recognized image file format.",
"Image Load Error",
JOptionPane.ERROR_MESSAGE);
return;
}
imagePanel.setImage(currentImage);
setButtonsEnabled(true);
showFilename(selectedFile.getPath());
showStatus("File loaded.");
frame.pack();
}
/**
* Close function: close the current image.
*/
private void close()
{
currentImage = null;
imagePanel.clearImage();
showFilename(null);
setButtonsEnabled(false);
}
/**
* Save As function: save the current image to a file.
*/
private void saveAs()
{
if(currentImage != null) {
int returnVal = fileChooser.showSaveDialog(frame);
if(returnVal != JFileChooser.APPROVE_OPTION) {
return; // cancelled
}
File selectedFile = fileChooser.getSelectedFile();
ImageFileManager.saveImage(currentImage, selectedFile);
showFilename(selectedFile.getPath());
}
}
/**
* Quit function: quit the application.
*/
private void quit()
{
System.exit(0);
}
/**
* Apply a given filter to the current image.
*
* @param filter The filter object to be applied.
*/
private void applyFilter(Filter filter)
{
if(currentImage != null)
{
filter.apply(currentImage);
frame.repaint();
showStatus("Applied: " + filter.getName());
}
else {
showStatus("No image loaded.");
}
}
/**
* 'About' function: show the 'about' box.
*/
private void showAbout()
{
JOptionPane.showMessageDialog(frame,
"ImageViewer\n" + VERSION,
"About ImageViewer",
JOptionPane.INFORMATION_MESSAGE);
}
/**
* Make the current picture larger.
*/
private void makeLarger()
{
if(currentImage != null) {
// create new image with double size
int width = currentImage.getWidth();
int height = currentImage.getHeight();
OFImage newImage = new OFImage(width * 2, height * 2);
// copy pixel data into new image
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
Color col = currentImage.getPixel(x, y);
newImage.setPixel(x * 2, y * 2, col);
newImage.setPixel(x * 2 + 1, y * 2, col);
newImage.setPixel(x * 2, y * 2 + 1, col);
newImage.setPixel(x * 2+1, y * 2 + 1, col);
}
}
currentImage = newImage;
imagePanel.setImage(currentImage);
frame.pack();
}
}
/**
* Make the current picture smaller.
*/
public void makeSmaller()
{
if(currentImage != null) {
// create new image with double size
int width = currentImage.getWidth() / 2;
int height = currentImage.getHeight() / 2;
OFImage newImage = new OFImage(width, height);
// copy pixel data into new image
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
newImage.setPixel(x, y, currentImage.getPixel(x * 2, y * 2));
}
}
currentImage = newImage;
imagePanel.setImage(currentImage);
frame.pack();
}
}
private void Reset()
{
if(currentImage != null) {
temp = ImageFileManager.loadImage(selectedFile);
currentImage = temp;
imagePanel.setImage(currentImage);
frame.pack();
}
}
private void makeDarker()
{
if(currentImage != null) {
int height = currentImage.getHeight();
int width = currentImage.getWidth();
OFImage newImage = new OFImage(width, height);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
newImage.setPixel(x, y, currentImage.getPixel(x, y).darker());
}
}
currentImage = newImage;
imagePanel.setImage(currentImage);
frame.pack();
}
}
private void makeLighter()
{
if(currentImage != null) {
int height = currentImage.getHeight();
int width = currentImage.getWidth();
OFImage newImage = new OFImage(width, height);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
newImage.setPixel(x, y, currentImage.getPixel(x, y).brighter());
}
}
currentImage = newImage;
imagePanel.setImage(currentImage);
frame.pack();
}
}
private void Rotate(int x)
{
if(currentImage != null)
{
double sin = Math.abs(Math.sin(Math.toRadians(x)));
double cos = Math.abs(Math.cos(Math.toRadians(x)));
int width = currentImage.getWidth();
int height = currentImage.getHeight();
int width_n = (int) Math.floor(width*cos + height*sin);
int height_n = (int) Math.floor(height*cos + width*sin);
BufferedImage r = new BufferedImage(width_n, height_n, currentImage.getType()); //BufferedImage(int width, int height, int imageType)
Graphics2D g = r.createGraphics();
g.translate((width_n-width)/2, (height_n-height)/2);
g.rotate(Math.toRadians(x), width/2, height/2);
g.drawImage(currentImage, null, 0, 0);
g.dispose();
currentImage=new OFImage(r);
imagePanel.setImage(currentImage);
}
}
private void makeGrayscale()
{
if(currentImage != null) {
int height = currentImage.getHeight();
int width = currentImage.getWidth();
OFImage newImage = new OFImage(width, height);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
Color pix = currentImage.getPixel(x, y);
int avg = (pix.getRed() + pix.getGreen() + pix.getBlue()) / 3;
newImage.setPixel(x, y, new Color(avg, avg, avg));
}
}
currentImage = newImage;
imagePanel.setImage(currentImage);
frame.pack();
}
}
/**
* Show the file name of the current image in the fils display label.
* 'null' may be used as a parameter if no file is currently loaded.
*
* @param filename The file name to be displayed, or null for 'no file'.
*/
private void showFilename(String filename)
{
if(filename == null) {
filenameLabel.setText("No file displayed.");
}
else {
filenameLabel.setText("File: " + filename);
}
}
/**
* Show a message in the status bar at the bottom of the screen.
* @param text The status message.
*/
private void showStatus(String text)
{
statusLabel.setText(text);
}
/**
* Enable or disable all toolbar buttons.
*
* @param status 'true' to enable the buttons, 'false' to disable.
*/
private void setButtonsEnabled(boolean status)
{
smallerButton.setEnabled(status);
largerButton.setEnabled(status);
LighterButton.setEnabled(status);
DarkerButton.setEnabled(status);
GrayScaleButton.setEnabled(status);
resetButton.setEnabled(status);
}
/**
* Create a list with all the known filters.
* @return The list of filters.
*/
private List<Filter> createFilters()
{
List<Filter> filterList = new ArrayList<Filter>();
filterList.add(new ThresholdFilter("Threshold"));
filterList.add(new InvertFilter("Invert"));
filterList.add(new SolarizeFilter("Solarize"));
filterList.add(new SmoothFilter("Smooth"));
filterList.add(new PixelizeFilter("Pixelize"));
filterList.add(new MirrorFilter("Mirror"));
filterList.add(new EdgeFilter("Edge Detection"));
filterList.add(new FishEyeFilter("Fish Eye"));
return filterList;
}
// ---- Swing stuff to build the frame and all its components and menus ----
/**
* Create the Swing frame and its content.
*/
private void makeFrame()
{
frame = new JFrame("ImageViewer");
JPanel contentPane = (JPanel)frame.getContentPane();
contentPane.setBorder(new EmptyBorder(6, 6, 6, 6));
makeMenuBar(frame);
// Specify the layout manager with nice spacing
contentPane.setLayout(new BorderLayout(6, 6));
// Create the image pane in the center
imagePanel = new ImagePanel();
imagePanel.setBorder(new EtchedBorder());
contentPane.add(imagePanel, BorderLayout.CENTER);
// Create two labels at top and bottom for the file name and status messages
filenameLabel = new JLabel();
contentPane.add(filenameLabel, BorderLayout.NORTH);
statusLabel = new JLabel(VERSION);
contentPane.add(statusLabel, BorderLayout.SOUTH);
// Create the toolbar with the buttons
JPanel toolbar = new JPanel();
toolbar.setLayout(new GridLayout(0, 1));
JLabel Sizing = new JLabel("Size");
toolbar.add(Sizing);
smallerButton = new JButton("Smaller");
smallerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeSmaller(); }
});
toolbar.add(smallerButton);
largerButton = new JButton("Larger");
largerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeLarger(); }
});
toolbar.add(largerButton);
JLabel Lighting = new JLabel("Lighting");
toolbar.add(Lighting);
LighterButton = new JButton("Lighter");
LighterButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeLighter(); }
});
toolbar.add(LighterButton);
DarkerButton = new JButton("Darker");
DarkerButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeDarker(); }
});
toolbar.add(DarkerButton);
GrayScaleButton = new JButton("Grayscale");
GrayScaleButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { makeGrayscale(); }
});
toolbar.add(GrayScaleButton);
JLabel reset = new JLabel("Reset & Rotate");
toolbar.add(reset);
resetButton = new JButton("Reset");
resetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { Reset(); }
});
toolbar.add(resetButton);
rotateButton = new JButton("Rotate Image");
rotateButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { Rotate(90); }
});
toolbar.add(rotateButton);
// Add toolbar into panel with flow layout for spacing
JPanel flow = new JPanel();
flow.add(toolbar);
contentPane.add(flow, BorderLayout.WEST);
// building is done - arrange the components
showFilename(null);
setButtonsEnabled(false);
frame.pack();
// place the frame at the center of the screen and show
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation(d.width/2 - frame.getWidth()/2, d.height/2 - frame.getHeight()/2);
frame.setVisible(true);
}
/**
* Create the main frame's menu bar.
*
* @param frame The frame that the menu bar should be added to.
*/
private void makeMenuBar(JFrame frame)
{
final int SHORTCUT_MASK =
Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
JMenuBar menubar = new JMenuBar();
frame.setJMenuBar(menubar);
JMenu menu;
JMenuItem item;
// create the File menu
menu = new JMenu("File");
menubar.add(menu);
item = new JMenuItem("Open...");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { openFile(); }
});
menu.add(item);
item = new JMenuItem("Close");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { close(); }
});
menu.add(item);
menu.addSeparator();
item = new JMenuItem("Save As...");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { saveAs(); }
});
menu.add(item);
menu.addSeparator();
item = new JMenuItem("Quit");
item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, SHORTCUT_MASK));
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { quit(); }
});
menu.add(item);
// create the Filter menu
menu = new JMenu("Filter");
menubar.add(menu);
for(final Filter filter : filters) {
item = new JMenuItem(filter.getName());
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
applyFilter(filter);
}
});
menu.add(item);
}
// create the Help menu
menu = new JMenu("Help");
menubar.add(menu);
item = new JMenuItem("About ImageViewer...");
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { showAbout(); }
});
menu.add(item);
}
} ImageFileManager
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;
/**
* ImageFileManager is a small utility class with static methods to load
* and save images.
*
* The files on disk can be in JPG or PNG image format. For files written
* by this class, the format is determined by the constant IMAGE_FORMAT.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 2.0
*/
public class ImageFileManager
{
// A constant for the image format that this writer uses for writing.
// Available formats are "jpg" and "png".
private static final String IMAGE_FORMAT = "jpg";
/**
* Read an image file from disk and return it as an image. This method
* can read JPG and PNG file formats. In case of any problem (e.g the file
* does not exist, is in an undecodable format, or any other read error)
* this method returns null.
*
* @param imageFile The image file to be loaded.
* @return The image object or null is it could not be read.
*/
public static OFImage loadImage(File imageFile)
{
try {
BufferedImage image = ImageIO.read(imageFile);
if(image == null || (image.getWidth(null) < 0)) {
// we could not load the image - probably invalid file format
return null;
}
return new OFImage(image);
}
catch(IOException exc) {
return null;
}
}
/**
* Write an image file to disk. The file format is JPG. In case of any
* problem the method just silently returns.
*
* @param image The image to be saved.
* @param file The file to save to.
*/
public static void saveImage(OFImage image, File file)
{
try {
ImageIO.write(image, IMAGE_FORMAT, file);
}
catch(IOException exc) {
return;
}
}
}
ImagePanel
import java.awt.*;
import javax.swing.*;
import java.awt.image.*;
/**
* An ImagePanel is a Swing component that can display an OFImage.
* It is constructed as a subclass of JComponent with the added functionality
* of setting an OFImage that will be displayed on the surface of this
* component.
* @author Bastian Farandy
* @credits Michael Kolling and David J. Barnes
* @version 1.0
*/
public class ImagePanel extends JComponent
{
// The current width and height of this panel
private int width, height;
// An internal image buffer that is used for painting. For
// actual display, this image buffer is then copied to screen.
private OFImage panelImage;
/**
* Create a new, empty ImagePanel.
*/
public ImagePanel()
{
width = 360; // arbitrary size for empty panel
height = 240;
panelImage = null;
}
/**
* Set the image that this panel should show.
*
* @param image The image to be displayed.
*/
public void setImage(OFImage image)
{
if(image != null) {
width = image.getWidth();
height = image.getHeight();
panelImage = image;
repaint();
}
}
/**
* Clear the image on this panel.
*/
public void clearImage()
{
Graphics imageGraphics = panelImage.getGraphics();
imageGraphics.setColor(Color.LIGHT_GRAY);
imageGraphics.fillRect(0, 0, width, height);
repaint();
}
// The following methods are redefinitions of methods
// inherited from superclasses.
/**
* Tell the layout manager how big we would like to be.
* (This method gets called by layout managers for placing
* the components.)
*
* @return The preferred dimension for this component.
*/
public Dimension getPreferredSize()
{
return new Dimension(width, height);
}
/**
* This component needs to be redisplayed. Copy the internal image
* to screen. (This method gets called by the Swing screen painter
* every time it want this component displayed.)
*
* @param g The graphics context that can be used to draw on this component.
*/
public void paintComponent(Graphics g)
{
Dimension size = getSize();
g.clearRect(0, 0, size.width, size.height);
if(panelImage != null) {
g.drawImage(panelImage, 0, 0, null);
}
}
}
OFImage
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
/**
* OFImage is a class that defines an image in OF (Objects First) format.
* @author Bastian Farandy
* @credits Michael Kolling and David J. Barnes
* @version 2.0
*/
public class OFImage extends BufferedImage
{
/**
* Create an OFImage copied from a BufferedImage.
* @param image The image to copy.
*/
public OFImage(BufferedImage image)
{
super(image.getColorModel(), image.copyData(null),
image.isAlphaPremultiplied(), null);
}
/**
* Create an OFImage with specified size and unspecified content.
* @param width The width of the image.
* @param height The height of the image.
*/
public OFImage(int width, int height)
{
super(width, height, TYPE_INT_RGB);
}
/**
* Set a given pixel of this image to a specified color. The
* color is represented as an (r,g,b) value.
* @param x The x position of the pixel.
* @param y The y position of the pixel.
* @param col The color of the pixel.
*/
public void setPixel(int x, int y, Color col)
{
int pixel = col.getRGB();
setRGB(x, y, pixel);
}
/**
* Get the color value at a specified pixel position.
* @param x The x position of the pixel.
* @param y The y position of the pixel.
* @return The color of the pixel at the given position.
*/
public Color getPixel(int x, int y)
{
int pixel = getRGB(x, y);
return new Color(pixel);
}
}
Filter
/**
* Filter is an abstract superclass for all image filters in this
* application. Filters can be applied to OFImages by invoking the apply
* method.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public abstract class Filter
{
private String name;
/**
* Create a new filter with a given name.
* @param name The name of the filter.
*/
public Filter(String name)
{
this.name = name;
}
/**
* Return the name of this filter.
*
* @return The name of this filter.
*/
public String getName()
{
return name;
}
/**
* Apply this filter to an image.
*
* @param image The image to be changed by this filter.
*/
public abstract void apply(OFImage image);
}
SolarizeFilter
import java.awt.Color;
/**
* An image filter to create a solarization effect.
* @author
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class SolarizeFilter extends Filter
{
/**
* Constructor for objects of class Solarize.
* @param name The name of the filter.
*/
public SolarizeFilter(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 pix = image.getPixel(x, y);
int red = pix.getRed();
if(red <= 127) {
red = 255 - red;
}
int green = pix.getGreen();
if(green <= 127) {
green = 255 - green;
}
int blue = pix.getBlue();
if(blue <= 127) {
blue = 255 - blue;
}
image.setPixel(x, y, new Color(red, green, blue));
}
}
}
}
ThresholdFilter
import java.awt.Color;
/**
* An three-level gray-based threshold filter.
* @author
* @credits 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);
}
}
}
}
}
EdgeFilter
import java.awt.Color;
import java.util.List;
import java.util.ArrayList;
/**
* An image filter to detect edges and highlight them, a bit like
* a colored pencil drawing.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class EdgeFilter extends Filter
{
private static final int TOLERANCE = 20;
private OFImage original;
private int width;
private int height;
/**
* Constructor for objects of class EdgeFilter.
* @param name The name of the filter.
*/
public EdgeFilter(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)
{
original = new OFImage(image);
width = original.getWidth();
height = original.getHeight();
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
image.setPixel(x, y, edge(x, y));
}
}
}
/**
* Return a new color that is the smoothed color of a given
* position. The "smoothed color" is the color value that is the
* average of this pixel and all the adjacent pixels.
* @param xpos The x position of the pixel.
* @param ypos The y position of the pixel.
* @return The smoothed color.
*/
private Color edge(int xpos, int ypos)
{
List<Color> pixels = new ArrayList<Color>(9);
for(int y = ypos-1; y <= ypos+1; y++) {
for(int x = xpos-1; x <= xpos+1; x++) {
if( x >= 0 && x < width && y >= 0 && y < height ) {
pixels.add(original.getPixel(x, y));
}
}
}
return new Color(255 - diffRed(pixels), 255 - diffGreen(pixels), 255 - diffBlue(pixels));
}
/**
* @param pixels The list of pixels to be averaged.
* @return The average of all the red values in the given list of pixels.
*/
private int diffRed(List<Color> pixels)
{
int max = 0;
int min = 255;
for(Color color : pixels) {
int val = color.getRed();
if(val > max) {
max = val;
}
if(val < min) {
min = val;
}
}
int difference = max - min - TOLERANCE;
if(difference < 0) {
difference = 0;
}
return difference;
}
/**
* @param pixels The list of pixels to be averaged.
* @return The average of all the green values in the given list of pixels.
*/
private int diffGreen(List<Color> pixels)
{
int max = 0;
int min = 255;
for(Color color : pixels) {
int val = color.getGreen();
if(val > max) {
max = val;
}
if(val < min) {
min = val;
}
}
int difference = max - min - TOLERANCE;
if(difference < 0) {
difference = 0;
}
return difference;
}
/**
* @param pixels The list of pixels to be averaged.
* @return The average of all the blue values in the given list of pixels.
*/
private int diffBlue(List<Color> pixels)
{
int max = 0;
int min = 255;
for(Color color : pixels) {
int val = color.getBlue();
if(val > max) {
max = val;
}
if(val < min) {
min = val;
}
}
int difference = max - min - TOLERANCE;
if(difference < 0) {
difference = 0;
}
return difference;
}
}
PixelizeFilter
import java.awt.Color;
/**
* An image filter to create a pixelization effect, like an enlarged
* low-resolution digital image.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class PixelizeFilter extends Filter
{
/**
* Constructor for objects of class PixelizeFilter.
* @param name The name of the filter.
*/
public PixelizeFilter(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)
{
final int PIXEL_SIZE = 5;
int width = image.getWidth();
int height = image.getHeight();
for(int y = 0; y < height; y += PIXEL_SIZE) {
for(int x = 0; x < width; x += PIXEL_SIZE) {
Color pix = image.getPixel(x, y);
for(int dy = y; dy < y + PIXEL_SIZE; dy++) {
for(int dx = x; dx < x + PIXEL_SIZE; dx++) {
if( dx < width && dy < height )
image.setPixel(dx, dy, pix);
}
}
}
}
}
}
MirrorFilter
import java.awt.Color;
/**
* An image filter to mirror (flip) the image horizontally.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class MirrorFilter extends Filter
{
/**
* Constructor for objects of class MirrorFilter.
* @param name The name of the filter.
*/
public MirrorFilter(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 / 2; x++) {
Color left = image.getPixel(x, y);
image.setPixel(x, y, image.getPixel(width - 1 - x, y));
image.setPixel(width - 1 - x, y, left);
}
}
}
}
SmoothFilter
import java.awt.Color;
import java.util.List;
import java.util.ArrayList;
/**
* An image filter to reduce sharp edges and pixelization. A bit like
* a soft lens.
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class SmoothFilter extends Filter
{
private OFImage original;
private int width;
private int height;
/**
* Constructor for objects of class SmoothFilter.
* @param name The name of the filter.
*/
public SmoothFilter(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)
{
original = new OFImage(image);
width = original.getWidth();
height = original.getHeight();
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
image.setPixel(x, y, smooth(x, y));
}
}
}
/**
* Return a new color that is the smoothed color of a given
* position. The "smoothed color" is the color value that is the
* average of this pixel and all the adjacent pixels.
* @param xpos The xposition of the pixel.
* @param ypos The yposition of the pixel.
* @return The smoothed color.
*/
private Color smooth(int xpos, int ypos)
{
List<Color> pixels = new ArrayList<Color>(9);
for(int y = ypos - 1; y <= ypos + 1; y++) {
for(int x = xpos - 1; x <= xpos + 1; x++) {
if( x >= 0 && x < width && y >= 0 && y < height )
pixels.add(original.getPixel(x, y));
}
}
return new Color(avgRed(pixels), avgGreen(pixels), avgBlue(pixels));
}
/**
* @param pixels The list of pixels.
* @return The average of all the red values in the given list of pixels.
*/
private int avgRed(List<Color> pixels)
{
int total = 0;
for(Color color : pixels) {
total += color.getRed();
}
return total / pixels.size();
}
/**
* @param pixels The list of pixels.
* @return The average of all the green values in the given list of pixels.
*/
private int avgGreen(List<Color> pixels)
{
int total = 0;
for(Color color : pixels) {
total += color.getGreen();
}
return total / pixels.size();
}
/**
* @param pixels The list of pixels.
* @return The average of all the blue values in the given list of pixels.
*/
private int avgBlue(List<Color> pixels)
{
int total = 0;
for(Color color : pixels) {
total += color.getBlue();
}
return total / pixels.size();
}
}
FishEyeFilter
import java.awt.Color;
/**
* An image filter to create an effect similar to a fisheye camera lens.
* (Works especially well on portraits.)
* @author Bastian Farandy
* @credits Michael Kolling and David J Barnes
* @version 1.0
*/
public class FishEyeFilter extends Filter
{
// constants:
private final static int SCALE = 20; // this defines the strenght of the filter
private final static double TWO_PI = 2 * Math.PI;
/**
* Constructor for objects of class LensFilter.
* @param name The name of the filter.
*/
public FishEyeFilter(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();
OFImage original = new OFImage(image);
int[] xa = computeXArray(width);
int[] ya = computeYArray(height);
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
image.setPixel(x, y, original.getPixel(x + xa[x], y + ya[y]));
}
}
}
/**
* Compute and return an array of horizontal offsets for each pixel column.
* These can then be applied as the horizontal offset for each pixel.
*/
private int[] computeXArray(int width)
{
int[] xArray = new int[width];
for(int i=0; i < width; i++) {
xArray[i] = (int)(Math.sin( ((double)i / width) * TWO_PI) * SCALE);
}
return xArray;
}
/**
* Compute and return an array of vertical offsets for each pixel row.
* These can then be applied as the vertical offset for each pixel.
*/
private int[] computeYArray(int height)
{
int[] yArray = new int[height];
for(int i=0; i < height; i++) {
yArray[i] = (int)(Math.sin( ((double)i / height) * TWO_PI) * SCALE);
}
return yArray;
}
} 
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