＋设为首页 ＋添加到收藏夹
(下面这个帖子相信很多人研究过,但是搞了两天都还没有把它做出来,也看了JWebCam开源项目,我既编译不了也运行不了它。超郁闷，求大虾急救，在线等，QQ：18401759)
我把程序分为两种，有趣的和无趣的，最近做了几个有趣的项目，其中一个，应当就算是摄像头拍照程序了。用于现场拍照，生成照片，主要用到Java Media Framework(JMF)。
首先到SUN下载最新的JMF，然后安装。http://java.sun.com/products/java-media/jmf/index.jsp
然后，说一下需求
1． 用摄像头拍照
2． 在文本框输入文件名
3． 按下拍照按钮，获取摄像头内的图像
4． 在拍下的照片上有一红框截取固定大小的照片。
5． 保存为本地图像为jpg格式，不得压缩画质
技术关键，相信也是大家最感兴趣的部分也就是如何让一个摄像头工作，并拍下一张照片了。
利用JMF，代码很简单：
//利用这三个类分别获取摄像头驱动，和获取摄像头内的图像流，获取到的图像流是一个Swing的Component组件类
public static Player player = null;
private CaptureDeviceInfo di = null;
private MediaLocator ml = null;
//文档中提供的驱动写法，为何这么写我也不知：）
String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
di = CaptureDeviceManager.getDevice(str2);
ml = di.getLocator();
try
{
player = Manager.createRealizedPlayer(ml);
player.start();
Component comp;
if ((comp = player.getVisualComponent()) != null)
{
add(comp, BorderLayout.NORTH);
}
}
catch (Exception e)
{
e.printStackTrace();
}
接下来就是点击拍照，获取摄像头内的当前图像。
代码也是很简单：
private JButton capture;
private Buffer buf = null;
private BufferToImage btoi = null;
private ImagePanel imgpanel = null;
private Image img = null;
private ImagePanel imgpanel = null;
JComponent c = (JComponent) e.getSource();
if (c == capture)//如果按下的是拍照按钮
{
FrameGrabbingControl fgc =(FrameGrabbingControl) player.getControl("javax.media.control.FrameGrabbingControl");
buf = fgc.grabFrame(); // 获取当前祯并存入Buffer类
btoi = new BufferToImage((VideoFormat) buf.getFormat());
img = btoi.createImage(buf); // show the image
imgpanel.setImage(img);
}
保存图像的就不多说了，以下为示例代码
BufferedImage bi = (BufferedImage) createImage(imgWidth, imgHeight);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
{
out = new FileOutputStream(s);
}
catch (java.io.FileNotFoundException io)
{
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(1f, false);//不压缩图像
encoder.setJPEGEncodeParam(param);
try
{
encoder.encode(bi);
out.close();
}
catch (java.io.IOException io)
{
System.out.println("IOException");
}
已经申请将JWebCam建立为一个开源项目，放到GRO，大家发挥自己的想象力加入自己的代码吧，比如拍摄视频，添加图像处理功能，等等。
package com.redtroy;
import javax.media.Player;
import javax.media.CaptureDeviceInfo;
import javax.media.MediaLocator;
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.media.control.FrameGrabbingControl;
import javax.media.Buffer;
import javax.media.util.BufferToImage;
import javax.media.format.VideoFormat;
import java.io.*;
import com.sun.image.codec.jpeg.*;
import javax.media.CaptureDeviceManager;
import javax.media.Manager;
import java.net.*;
import java.applet.*;
//import javax.swing.im
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2005</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/
public class Camera
extends JFrame {
private static Player player = null;
private CaptureDeviceInfo device = null;
private MediaLocator locator = null;
private Buffer buffer = null;
private BufferToImage b2i = null;
private Image image;
private ImageIcon iicon = new ImageIcon();
boolean proportion = true;
String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
Component component1;
JLabel jLabel1 = new JLabel();
public Camera() {
super("troy的摄像机(无保存功能)");
try {
jbInit();
}
catch (Exception e) {
e.printStackTrace();
}
}
public Image resize(int width, int height, Image source, boolean flag) {
this.proportion = flag;
int new_w;
int new_h;
Toolkit tk = Toolkit.getDefaultToolkit();
Applet app = new Applet();
MediaTracker mt = new MediaTracker(app);
Image img = source;
try {
mt.addImage(img, 0);
mt.waitForID(0);
}
catch (Exception e) {
e.printStackTrace();
}
if (img.getWidth(null) == -1) {
System.out.println(" cant read,retry!" + "<BR>");
return null;
}
else {
if (this.proportion == true) { //判断是否是等比缩放.
//为等比缩放计算输出的图片宽度及高度
double rate1 = ( (double) img.getWidth(null)) / (double) width +
0.1;
double rate2 = ( (double) img.getHeight(null)) / (double) height +
0.1;
double rate = rate1 > rate2 ? rate1 : rate2;
new_w = (int) ( ( (double) img.getWidth(null)) / rate);
new_h = (int) ( ( (double) img.getHeight(null)) / rate);
}
else {
new_w = width; //输出的图片宽度
new_h = height; //输出的图片高度
}
}
BufferedImage buffImg = new BufferedImage(new_w, new_h,
BufferedImage.TYPE_INT_RGB);
Graphics g = buffImg.createGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, new_w, new_h);
g.drawImage(img, 0, 0, new_w, new_h, null);
g.dispose();
try {
OutputStream tempout = new
FileOutputStream("C:\\temp.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(tempout);
encoder.encode(buffImg);
tempout.close();
}
catch (Exception e) {
e.printStackTrace();
}
return tk.createImage("C:\\temp.jpg");
}
public static void main(String[] args) {
Camera camera1 = new Camera();
}
private void jbInit() throws Exception {
component1 = Box.createGlue();
//=====================初始化设备===================//
component1.addNotify();
device = CaptureDeviceManager.getDevice(str2);
locator = device.getLocator();
try {
player = Manager.createRealizedPlayer(locator);
player.start();
if ( (component1 = player.getVisualComponent()) != null) {
this.getContentPane().add(component1, null);
}
}
catch (Exception e) {
e.printStackTrace();
}
jButton1.setBounds(new Rectangle(294, 28, 73, 25));
jButton1.setText("拍照");
jButton1.addActionListener(new Camera_jButton1_actionAdapter(this));
this.getContentPane().setLayout(null);
jButton2.setBounds(new Rectangle(295, 82, 73, 25));
jButton2.setText("保存");
jButton2.addActionListener(new Camera_jButton2_actionAdapter(this));
component1.setBounds(new Rectangle(27, 23, 243, 235));
jLabel1.setIconTextGap(4);
jLabel1.setText("空");
jLabel1.setVerticalTextPosition(SwingConstants.CENTER);
jLabel1.setBounds(new Rectangle(293, 139, 80, 95));
this.getContentPane().add(jButton1, null);
this.getContentPane().add(jButton2, null);
this.getContentPane().add(jLabel1, null);
this.setSize(400, 300);
this.setVisible(true);
}
void jButton1_actionPerformed(ActionEvent e) {
iicon = new ImageIcon();
FrameGrabbingControl fgc = (FrameGrabbingControl) player.getControl(
"javax.media.control.FrameGrabbingControl");
buffer = fgc.grabFrame(); // 获取当前祯并存入Buffer类
b2i = new BufferToImage( (VideoFormat) buffer.getFormat());
image = b2i.createImage(buffer); // show the image
iicon = new ImageIcon();
/* Toolkit tk = Toolkit.getDefaultToolkit();
Applet app = new Applet();
MediaTracker mt = new MediaTracker(app);*/
iicon.setImage(this.resize(85, 95, image, true));
jLabel1.setIcon(iicon);
}
void jButton2_actionPerformed(ActionEvent e) {
JFileChooser filechooser = new JFileChooser();
filechooser.setFileHidingEnabled(true);
filechooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int result = filechooser.showSaveDialog(null);
if (result == JFileChooser.CANCEL_OPTION) {
return;
}
File file = filechooser.getSelectedFile();
if (file == null || file.getName().equals("")) {
JOptionPane.showMessageDialog(null, "无效的文件名", "警告",
JOptionPane.ERROR_MESSAGE);
}
else {
String s = file.getAbsolutePath();
BufferedImage bi = (BufferedImage) createImage(image.getWidth(null),
image.getHeight(null));
Graphics2D g2 = bi.createGraphics();
g2.drawImage(image, null, null);
FileOutputStream out = null;
try {
out = new FileOutputStream(s);
}
catch (java.io.FileNotFoundException io) {
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(1f, false); //不压缩图像
encoder.setJPEGEncodeParam(param);
try {
encoder.encode(bi);
out.close();
}
catch (java.io.IOException io) {
System.out.println("IOException");
}
}
}
}
class Camera_jButton1_actionAdapter
implements java.awt.event.ActionListener {
Camera adaptee;
Camera_jButton1_actionAdapter(Camera adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);
}
}
class Camera_jButton2_actionAdapter
implements java.awt.event.ActionListener {
Camera adaptee;
Camera_jButton2_actionAdapter(Camera adaptee) {
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e) {
adaptee.jButton2_actionPerformed(e);
}
}
给分啊，楼主
