JAVA如何控制摄像头？大送分！！！

zyily 2006-05-19 03:36:33

运用JAVA或Javascript，通过SDK，要控制摄像头，如何做？？有谁有这方面的经验？？大送分！！！！！

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fjwns 2007-04-06

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zeroxxx 2006-05-26

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/**
* 图
* @param img
* @param s:filePath
*/
public void saveJPG(Image img, String s,String filename) {

// img=getImage(null,"1.jpg");
final int INTWIDTH=800;
final int INTHEIGHT=600;
BufferedImage bi = (BufferedImage) createImage(INTWIDTH,
INTHEIGHT);

// BufferedImage bi=(BufferedImage)createImage(img.getWidth(null),
// img.getHeight(null));

File filedir = new File(s);
if (!filedir.exists()) {
filedir.mkdirs(); //新建目录
}
System.out.println("ghf----" + img.getWidth(null) + " hgf----" +
img.getHeight(null));
Graphics g = bi.createGraphics();
g.drawImage(img,0,0,INTWIDTH,INTHEIGHT,null);
// Graphics2D g2 = bi.createGraphics();
// g2.drawImage(img, null, null);

//图像输出,保存部分
//File f = new File(s+filename);
//if (f.exists()){
//new File(s+filename).delete();
//}
FileOutputStream out = null;
try {
System.out.println("filename----------------"+s+filename);
out = new FileOutputStream(new File(s+filename));
} 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);
encoder.setJPEGEncodeParam(param);
try {
encoder.encode(bi);
out.close();
creatMark(s+filename, username);
} catch (java.io.IOException io) {
System.out.println("IOException");
}
/*AppletContext ac = getAppletContext();
try {
ac.showDocument(new URL(
"http://webserver:7001/Workflow/custom/public/affiliatedInfo_upload_main.jsp?"
+ "ls_workflow_type=affupload&"
+ "ls_wfid=b120&"
+ "li_insid=134020000006559&"
+ "ls_taxpayerID=340211790123101&"
+ "ls_affID=FB-0001&"
+ "ls_affName=aaaaaaaaaaaaa&"
+ "path=" + s));
} catch (MalformedURLException ex) {
ex.printStackTrace();
}*/

String filestr ="" ;
File file = new File(s+filename);
FileInputStream fin = null;
try {
fin = new FileInputStream(file);
} catch (FileNotFoundException ex) {
}
byte[] byt = new byte[4096];
int bb;
try {
while ((bb = fin.read(byt, 0, 4096)) != -1) {
filestr = filestr + encodeHex(byt);
}
} catch (IOException ex1) {
}

//"http://webserver:7001/Workflow
System.out.println("host---------------------"+host);
try {
java.net.URL url = new java.net.URL(host+"/servlet/WebCang_servlet?insid="
+ insid +"&affID="
+ affID +"&affName="
+ affname +"&filestr="
+filestr);
java.net.URLConnection con = url.openConnection();
con.setUseCaches(true);
con.setDoOutput(true);
con.setDoInput(true);
//con.setRequestProperty("Content-type", "application/octest-stream");
/*FileInputStream fin = null;
File file = new File(s);
fin = new FileInputStream(file);
System.out.println("fin.available()------------"+fin.available());
DataOutputStream dataout = new DataOutputStream(con.getOutputStream());
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = fin.read(buffer, 0, 8192)) != -1) {
dataout.write(buffer, 0, bytesRead); //将文件写入Stream
}*/
DataOutputStream dataout = new DataOutputStream(con.getOutputStream());
dataout.flush();
dataout.close();
System.out.println(dataout.size());
DataInputStream in = new DataInputStream(con.getInputStream());
in.close();
filedir.delete();
JOptionPane.showMessageDialog(this,"照片上传成功","操作提示",0);
} catch (Exception e) {
e.printStackTrace();
}
}
}

zeroxxx 2006-05-26

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/**
* 照片处理
* @param imagePath
* @param userName
*/
public void creatMark(String imagePath, String userName) {
ImageIcon imgIcon = new ImageIcon(imagePath);
Image theImg = imgIcon.getImage();
int width = theImg.getWidth(null);
int height = theImg.getHeight(null) + 30;

try {
BufferedImage bimage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_BGR);
Graphics2D g = bimage.createGraphics();
// 设置填充背景为白色
g.setBackground(Color.DARK_GRAY);
g.clearRect(0, 0, width, height);
// 设置字体颜色
g.setColor(Color.white);
// 绘制指定图像的当前可用部分
g.drawImage(theImg, 0, 15, null);

SimpleDateFormat formatter_time = new SimpleDateFormat(
"yyyy-MM-dd hh:mm:ss");
String up_time = formatter_time.format(new java.util.Date());

// 使用该图形上下文的当前字体和颜色，绘制由指定的字符串给出的文本
g.drawString(("本电子图片由" + userName + "于:" + up_time +
"上传，版权归属芜湖市国家税务局所有."), 10, 15); // 添加文字
// 撤消该图形的上下文并释放它所使用的任何系统资源。在 dispose 方法被调用后， Graphics 对象将不能被使用
g.dispose();

// 图片输出
FileOutputStream image_out = new FileOutputStream(imagePath); // "f:/deploy/Workflow/aa.jpg"
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(image_out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bimage);
param.setQuality(50f, true);
encoder.encode(bimage, param);
image_out.close();
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 将byte数组转换为表示16进制值的字符串
* 和public static String hexStr2ByteArr(String strIn)
* 互为可逆的转换过程
* @param bytes 需要转换的byte数组
* @return 转换后的字符串
* @throws Exception 本方法不处理任何异常，所有异常全部抛出
* @author <a href="mailto:c_r_zhu@hotmail.com">PeterZhu</a>
*/
public static final String encodeHex(byte[] bytes) {
StringBuffer buf = new StringBuffer(bytes.length * 2);
int i;

for (i = 0; i < bytes.length; i++) {
if (((int) bytes[i] & 0xff) < 0x10) {
buf.append("0");
}
buf.append(Long.toString((int) bytes[i] & 0xff, 16));
}
return buf.toString();
}

/**
* 将表示16进制值的字符串转换为byte数组，
* 和public static String encodeHex(byte[] arrB)
* 互为可逆的转换过程
* @param strIn 需要转换的字符串
* @return 转换后的byte数组
* @throws Exception 本方法不处理任何异常，所有异常全部抛出
* @author <a href="mailto:c_r_zhu@hotmail.com">PeterZhu</a>
*/
public static byte[] hexStr2ByteArr(String strIn)
throws Exception
{
byte[] arrB = strIn.getBytes();
int iLen = arrB.length;

//两个字符表示一个字节，所以字节数组长度是字符串长度除以2
byte[] arrOut = new byte[iLen / 2];
for (int i = 0; i < iLen; i = i + 2)
{
String strTmp = new String(arrB, i, 2);
arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
}
return arrOut;
}

zeroxxx 2006-05-26

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B/S架构的摄像头控制是完全可以的，小弟做过这个工作。附上源代码，有很多地方没有修改，不过绝对可以运行的，如果需要保存可以使用数字证书打包，
/**
*
*/
package com.etong.util.webVideo;

import javax.swing.*;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.SimpleDateFormat;
import java.util.ArrayList;

import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;

import java.applet.Applet;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;

import jmapps.util.*;

import com.sun.image.codec.jpeg.*;
import javax.media.protocol.DataSource;
import java.applet.AppletContext;

public class WebCang extends JApplet implements ActionListener {
public static Player player = null;

private CaptureDeviceInfo di = null;

private MediaLocator ml = null;

String insid = null;

String taxpayerid = null;

String affID = null;

String affname = null;

String wfid = null;

String username = null;

String host = null;

String aid = null;

String tid = null;

int xx = 0;

/**
* 按钮
*/
private JButton capture = null;

/**
* 按钮
*/
private JButton save = null;

private JButton open = null;

private JButton close = null;

private JTextField num = null;

private Buffer buf = null;

private Image img = null;

private Image img2 = null;

// private VideoFormat vf = null;
private BufferToImage btoi = null;

private ImagePanel imgpanel = null;

/**
* 选取x,y,width,height默值
*/
private int rectX;

private int rectY;

private int rectWidth = 320;

private int rectHeight = 240;

private int imgWidth = 320;

private int imgHeight = 240;

/**
* 默媳募
*/
private String fname = "工作流附件程序";

public void init() {
insid = this.getParameter("insid");
taxpayerid = this.getParameter("taxpayerid");
affID = this.getParameter("affID");
affname = this.getParameter("affname");
wfid = this.getParameter("wfid");
username = this.getParameter("username");
host = this.getParameter("host");
aid = this.getParameter("aid");
tid = this.getParameter("tid");

setLayout(new BorderLayout());
setSize(320, 240);

imgpanel = new ImagePanel();
imgpanel.addMouseMotionListener(imgpanel);
capture = new JButton("拍照");
capture.addActionListener(this);
save = new JButton("上传该附件");
save.addActionListener(this);
open = new JButton("打开拍照");
open.addActionListener(this);
close = new JButton("关闭拍照");
close.addActionListener(this);
//num = new JTextField();

String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
//从驱动管理器中获取驱动,一般使用MicroOS默认的驱动，str1为罗技的摄像头驱动
di = CaptureDeviceManager.getDevice(str2);
//获得本地媒体源
ml = di.getLocator();
try {
//通过获取的本地源建立播放者对象
DataSource dataSource;
//player对象可以使用Manager.createRealizedPlayer(di.getLocator())直接构造，
//player = Manager.createRealizedPlayer(di.getLocator());
dataSource = JMFUtils.createCaptureDataSource(null, null, str2,
di.getFormats()[4]);
//如果自行设置格式应当使用DataSource对象构建，其中DataSource对象位置为javax.media.protocol.DataSource;
player = Manager.createRealizedPlayer(dataSource);
//播放者开始播放
player.start();
Panel panelx2 = new Panel(new GridLayout(1, 2));
Component comp;
if ((comp = player.getVisualComponent()) != null) {
//增加播放源在窗口上
panelx2.add(comp);
comp.setSize(new Dimension(640, 480));
}
Panel panelx = new Panel(new GridLayout(1, 7));
Panel panel1 = new Panel(new BorderLayout());
panelx.add(new Panel());
panelx.add(capture);
panelx.add(new Panel());
panelx.add(save);
panelx.add(new Panel());
panel1.add(new Label(), BorderLayout.WEST);
//panel1.add(num, BorderLayout.CENTER);
//panelx.add(open);
panelx.add(close);
panelx.add(new Panel());
panel1.add(panelx2, BorderLayout.NORTH);
panel1.add(panelx, BorderLayout.SOUTH);
add(panel1, BorderLayout.CENTER);
panelx2.add(imgpanel);
//add(panelx2,BorderLayout.NORTH);
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) throws ClassNotFoundException {

try {
URL url = new URL(
"http://webserver:7001/Workflow/servlet/WebCang");

URLConnection urlConn = url.openConnection();
urlConn.setUseCaches(false);
urlConn.setDefaultUseCaches(false);

} catch (MalformedURLException e1) {

e1.printStackTrace();
} catch (IOException e) {

e.printStackTrace();
}

}
/**
* 乇头
*
*/
public static void playerclose() {
player.close();
player.deallocate();
}

/**
*
*/
public void actionPerformed(ActionEvent e) {
JComponent c = (JComponent) e.getSource();
if (c == capture) { // 抓取当前frame
FrameGrabbingControl fgc = (FrameGrabbingControl) player
.getControl(
"javax.media.control.FrameGrabbingControl");
//public Control getControl(java.lang.String forName)获得由forName类型的control或接口interface

buf = fgc.grabFrame();
//public Buffer grabFrame(),获取当前祯

btoi = new BufferToImage((VideoFormat) buf.getFormat());//转化流格式
//public BufferToImage(VideoFormat format),为指定格式的图象变换对象实例化一个缓冲区

img = btoi.createImage(buf); // 显示抓取图片
//public java.awt.Image createImage(Buffer buffer)，
//将输入流转换成一个标准的AWT格式的图象，并且返回这个图象。

imgpanel.setImage(img); // 设置imgpanel图片属性
img2 = img;
//new File("c:/load/WorkflowPhoto/temp.jpg").delete();
JOptionPane.showMessageDialog(this,"拍照成功","操作提示",0);
} else if (c == save) {
if (img != null) {
//fname = !num.getText().equals("") ? num.getText() : "temp";
fname = "temp";
xx++;
saveJPG(img2, "c:/WorkflowPhoto/" , fname+ xx + ".jpg");
//WebCangFile.saveJPG(img,"f:/"+ fname + ".jpg");
}
}else if (c == close){
player.close();
JOptionPane.showMessageDialog(this,"拍照程序已经关闭，如需再次使用请关闭窗口，重新开启！","操作提示",0);
}
}

zyily 2006-05-25