java 图片处理_Java图像处理

骑猪看日落 2022-11-01 13:59 171阅读 0赞

要求实现简单的图像处理功能：

(1)打开一副图像；

(2)对打开的图像进行简单处理，至少包括两种操作，如均值滤波、直方图均衡化等；

(3)对处理之后的图像进行保存；

import java.awt.EventQueue;

import java.awt.event.\*;

import java.io.\*;

import javax.swing.\*;

/\*\*

\* A program for viewing images.

\* @version 1.22 2017-3-17

\* @author \*\*

\*/

public class ImageViewer

public static void main(String\[\] args)

EventQueue.invokeLater(new Runnable()

public void run()

JFrame frame = new ImageViewerFrame();

frame.setTitle("Image Processing");

frame.setDefaultCloseOperation(JFrame.EXIT\_ON\_CLOSE);

frame.setVisible(true);

\});

import java.awt.\*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.image.BufferedImage;

import java.awt.image.ColorModel;

import java.awt.image.PixelGrabber;

import java.io.\*;

import javax.imageio.ImageIO;

import javax.swing.\*;

class ImageViewerFrame extends JFrame

private JLabel label;

private JFileChooser chooser;

private static final int DEFAULT\_WIDTH = 600;

private static final int DEFAULT\_HEIGHT = 480;

String name = " ";

Image im, tmp;

int i, iw, ih;

int\[\] pixels;

boolean flag\_load = false;

boolean flag\_grey = false;

public ImageViewerFrame()

setSize(DEFAULT\_WIDTH, DEFAULT\_HEIGHT);

// use a label to display the images

label = new JLabel();

add(label);

// set up the file chooser

chooser = new JFileChooser();

chooser.setCurrentDirectory(new File("."));

// set up the menu bar

JMenuBar menuBar = new JMenuBar();

setJMenuBar(menuBar);

JMenu menu = new JMenu("File");

menuBar.add(menu);

JMenuItem openItem = new JMenuItem("Open");

menu.add(openItem);

openItem.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent event)

// show file chooser dialog

int result = chooser.showOpenDialog(null);

// if file selected, set it as icon of the label

if (result == JFileChooser.APPROVE\_OPTION)

name = chooser.getSelectedFile().getPath();

//label.setIcon(new ImageIcon(name));

File inputFile = new File(name);

if(name != " ")

flag\_load = true;

BufferedImage input = null;

try \{

input = ImageIO.read(inputFile);

\} catch (IOException e) \{

// TODO Auto-generated catch block

e.printStackTrace();

iw = input.getWidth();

ih = input.getHeight();

pixels = new int\[iw\*ih\];

im = input;

tmp = input;

flag\_load = true;

repaint();

\});

JMenuItem SaveItem = new JMenuItem("Save");

menu.add(SaveItem);

SaveItem.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent e)

try \{

jSave\_ActionPerformed(e);

\} catch (IOException e1) \{

e1.printStackTrace();

\});

JMenuItem SaveAsItem = new JMenuItem("Save As");

menu.add(SaveAsItem);

SaveAsItem.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent e)

try \{

jSave\_ActionPerformed1(e);

\} catch (IOException e1) \{

e1.printStackTrace();

\});

JMenuItem exitItem = new JMenuItem("Exit");

menu.add(exitItem);

exitItem.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent event)

System.exit(0);

\});

JMenu menu1 = new JMenu("Edit");

menuBar.add(menu1);

JMenuItem deal1 = new JMenuItem("均值滤波");

menu1.add(deal1);

deal1.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent e)

jMean\_ActionPerformed(e);

\});

JMenuItem deal2 = new JMenuItem("直方图均衡化");

menu1.add(deal2);

deal2.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent e)

try \{

jGrey\_ActionPerformed(e);

\} catch (IOException e1) \{

// TODO Auto-generated catch block

e1.printStackTrace();

jRun\_ActionPerformed(e);

\});

JMenuItem deal3 = new JMenuItem("黑白");

menu1.add(deal3);

deal3.addActionListener(new ActionListener()

public void actionPerformed(ActionEvent e)

try \{

jGrey\_ActionPerformed(e);

\} catch (IOException e1) \{

e1.printStackTrace();

\});

public void jMean\_ActionPerformed(ActionEvent e) \{

if(flag\_load)\{

try\{

PixelGrabber pg = new PixelGrabber(im,0,0,iw,ih,pixels,0,iw);

pg.grabPixels();

\}catch(InterruptedException e3)\{

e3.printStackTrace();

BufferedImage grayImage = new BufferedImage(iw, ih,

BufferedImage.TYPE\_INT\_RGB);

ColorModel cm = ColorModel.getRGBdefault();

for(int i=1;i

for(int j=1;j

int red1 = cm.getRed(pixels\[(i-1)\*iw+j-1\]);

int red2 = cm.getRed(pixels\[(i-1)\*iw+j\]);

int red3 = cm.getRed(pixels\[(i-1)\*iw+j+1\]);

int red4 = cm.getRed(pixels\[i\*iw+j-1\]);

int red6 = cm.getRed(pixels\[i\*iw+j+1\]);

int red7 = cm.getRed(pixels\[(i+1)\*iw+j-1\]);

int red8 = cm.getRed(pixels\[(i+1)\*iw+j\]);

int red9 = cm.getRed(pixels\[(i+1)\*iw+j+1\]);

int meanRed = (red1+red2+red3+red4+red6+red7+red8+red9)/8;

int green1 = cm.getGreen(pixels\[(i-1)\*iw+j-1\]);

int green2 = cm.getGreen(pixels\[(i-1)\*iw+j\]);

int green3 = cm.getGreen(pixels\[(i-1)\*iw+j+1\]);

int green4 = cm.getGreen(pixels\[i\*iw+j-1\]);

int green6 = cm.getGreen(pixels\[i\*iw+j+1\]);

int green7 = cm.getGreen(pixels\[(i+1)\*iw+j-1\]);

int green8 = cm.getGreen(pixels\[(i+1)\*iw+j\]);

int green9 = cm.getGreen(pixels\[(i+1)\*iw+j+1\]);

int meanGreen = (green1+green2+green3+green4+green6+green7+green8+green9)/8;

int blue1 = cm.getBlue(pixels\[(i-1)\*iw+j-1\]);

int blue2 = cm.getBlue(pixels\[(i-1)\*iw+j\]);

int blue3 = cm.getBlue(pixels\[(i-1)\*iw+j+1\]);

int blue4 = cm.getBlue(pixels\[i\*iw+j-1\]);

int blue6 = cm.getBlue(pixels\[i\*iw+j+1\]);

int blue7 = cm.getBlue(pixels\[(i+1)\*iw+j-1\]);

int blue8 = cm.getBlue(pixels\[(i+1)\*iw+j\]);

int blue9 = cm.getBlue(pixels\[(i+1)\*iw+j+1\]);

int meanBlue = (blue1+blue2+blue3+blue4+blue6+blue7+blue8+blue9)/8;

int rgb = 255<<24|meanRed<<16|meanGreen<<8|meanBlue;

grayImage.setRGB(j, i, rgb);

tmp = grayImage;

repaint();

\}else\{

JOptionPane.showMessageDialog(null, "请打开一张图片！","提示：",

JOptionPane.WARNING\_MESSAGE);

public void jSave\_ActionPerformed(ActionEvent e) throws IOException\{

if(flag\_load)

BufferedImage bi = new BufferedImage(tmp.getWidth(null),tmp.getHeight(null), BufferedImage.TYPE\_INT\_RGB);

Graphics g = bi.getGraphics();

g.drawImage(tmp,0, 0,null);

g.dispose();

File save\_path=new File(name+"(1)"+".jpg");

ImageIO.write(bi, "JPG", save\_path);

else

JOptionPane.showMessageDialog(null, "请打开一张图片！","提示：",JOptionPane.WARNING\_MESSAGE);

public void jSave\_ActionPerformed1(ActionEvent e) throws IOException\{

if(flag\_load)

int result = chooser.showOpenDialog(null);

BufferedImage bi = new BufferedImage(tmp.getWidth(null),tmp.getHeight(null), BufferedImage.TYPE\_INT\_RGB);

Graphics g = bi.getGraphics();

g.drawImage(tmp,0, 0,null);

g.dispose();

String name1 = chooser.getSelectedFile().getPath();

if (result == JFileChooser.APPROVE\_OPTION)

File save\_path=new File(name1);

ImageIO.write(bi, "JPG", save\_path);

else

JOptionPane.showMessageDialog(null, "请打开一张图片！","提示：",JOptionPane.WARNING\_MESSAGE);

public void jRun\_ActionPerformed(ActionEvent e)\{

if(flag\_load&&flag\_grey)\{

try\{

PixelGrabber pg = new PixelGrabber(tmp,0,0,iw,ih,pixels,0,iw);

pg.grabPixels();

\}catch(InterruptedException e3)\{

e3.printStackTrace();

BufferedImage greyImage = new BufferedImage(iw, ih,

BufferedImage.TYPE\_BYTE\_GRAY);

//获取图像的直方图

int\[\] histogram = new int\[256\];

for(int i=0; i

for(int j=0; j

int grey = pixels\[i\*iw+j\]&0xff;

histogram\[grey\]++;

//直方图均衡化

double a = (double)255/(iw\*ih);

double\[\] c = new double \[256\];

c\[0\] = (a\*histogram\[0\]);

for(int i=1; i<256; i++)\{

c\[i\] = c\[i-1\]+(int)(a\*histogram\[i\]);

for(int i=0; i

for(int j=0; j

int grey = pixels\[i\*iw+j\]&0x0000ff;

int hist = (int)(c\[grey\]);

pixels\[i\*iw+j\] = 255<<24|hist<<16|hist<<8|hist;

greyImage.setRGB(j, i, pixels\[i\*iw+j\]);

tmp = greyImage;

flag\_load = true;

repaint();

\}else\{

public void jGrey\_ActionPerformed(ActionEvent e) throws IOException\{

if(flag\_load)\{

File inputFile = new File(name);

BufferedImage input = ImageIO.read(inputFile);

iw = input.getWidth(this);

ih = input.getHeight(this);

pixels = new int\[iw\*ih\];

BufferedImage grayImage = new BufferedImage(iw, ih,

BufferedImage.TYPE\_BYTE\_GRAY);

for(int i=0; i

for(int j=0; j

int rgb = input.getRGB(i, j);

int grey = (int) (0.3\*((rgb&0xff0000 )>>16)+0.59\*((rgb&0xff00 )>>8)+0.11\*((rgb&0xff)));

rgb = 255<<24|grey<<16|grey<<8|grey;

grayImage.setRGB(i, j, rgb);

tmp = grayImage;

try\{

PixelGrabber pg = new PixelGrabber(tmp,0,0,iw,ih,pixels,0,iw);

pg.grabPixels();

\}catch(InterruptedException e3)\{

e3.printStackTrace();

flag\_grey = true;

repaint();

\} else\{

JOptionPane.showMessageDialog(null, "请打开一张图片！","提示：",

JOptionPane.WARNING\_MESSAGE);

public void paint(Graphics g)\{

if(flag\_load)\{

g.drawImage(tmp,DEFAULT\_WIDTH/8,DEFAULT\_HEIGHT/6,this);

\}else\{\}

java 图片处理_Java图像处理

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