How To Receive And Display Image From Network Camera

[sri_reddy523]

hi

I am trying to get the image from the network camera.
Below program is able to establish the connection with the camera web server,I can able to receive the response.
I am not gettin image data in command prompt






import java.io.*;

import java.net.*;


class TCPClient {

public static void main(String argv[]) throws Exception

{
String sentence;
String modifiedSentence;


BufferedReader inFromUser =

new BufferedReader(new InputStreamReader(System.in));




Socket clientSocket = new Socket("192.168.0.100", 80);



DataOutputStream outToServer =
new DataOutputStream(clientSocket.getOutputStream());

BufferedReader inFromServer =
new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));



sentence = inFromUser.readLine();



outToServer.writeBytes(sentence + '\n');



modifiedSentence = inFromServer.readLine();



System.out.println("FROM SERVER: " + modifiedSentence);

String headerline=null;


while((headerline = inFromServer.readLine()).length()!=0 ) {



System.out.println(headerline);
}





clientSocket.close();

}

}

[CJSLMAN]

I'm definitely not an expert in this subject, but your program is expecting to receive a string... can a camera image be received in a string variable? Everything that I've been able to look up points that you have to use Java Media Framework library (JMF).

CJSL

[Steve11235]

Is the camera acting as an HTTP server? Using a raw socket to talk to a Web server is going to be unnecessarily complicated...

[sri_reddy523]

Instead of string how can I store image

I am getting server response from can server as

command in prompt:GET ://192.168.0.100/oneshotimage.jpg

Response:

FROM SERVER: HTTP/1.0 200 OK
Date: Fri, 27 Feb 2009 05:14:50 GMT
Server: Boa/0.94.14rc18
Accept-Ranges: bytes
Connection: close
///<jpeg data but i am not getting >> except data m receiving response


Please help me how to store image data, Where I am committing mistake because if I run CGI command in browser its working.

Please help me, I have to submit program tomorrow

Thank you,

[Steve11235]

Look at HTTPUrlConnection and URLConnection.getContent().

[sri_reddy523]

hi

Above method u have suggested works to receive image from PTZ camera but in case of POST command how can I send message to camera to control PTZ motion, because I have sent POST commands to the camera, its not working with above program.

Please suggest me...................


Thank you

[sri_reddy523]

import java.net.*;
import javax.imageio.*;
import java.io.InputStream;

class TCPClient5 {
public static void main(String argv[]) throws Exception
{

java.io.InputStream s = null;
java.io.InputStreamReader r = null;
//java.io.BufferedReader b = null;
StringBuilder content = new StringBuilder();
try {
URLConnection uc = new URL("countryflower.com/Country_Flower_Home_Pic.jpg").openConnection();
s = uc.getInputStream();
System.out.println(uc.getContentLength());
//r = new java.io.InputStreamReader(s);
//b = new java.io.BufferedReader(r);

byte[] buffer = new byte[37006];
int n = 0;
File f = new File("c:\\Users\\dell\\Desktop\\image\\image.jpg") ;
DataOutputStream outdata = new DataOutputStream(new FileOutputStream(f));
while (n >= 0) {
n = s.read(buffer, 0, buffer.length);

outdata.write(buffer, 0, buffer.length);
}
}
finally {
//if (b != null) b.close();
if (r != null) r.close();
if (s != null) s.close();
}

}

}
When I run the above code I am receiving only half image ,
Please suggest me asap............

[Steve11235]

First, clean up the read loop logic. I suggest

while(true) {
n = s.read(...);
if (n == -1) break;
if (n == 0) {Thread.sleep(50); continue;}
outdata.write(...);
}

Second, wrap your input stream with BufferedInputStream, and get rid of the dead code.

Third, you never flush or close outdata. Possibly, the buffer is not being completely written.

[sri_reddy523]

class TCPClient5 {
public static void main(String argv[]) throws Exception
{
java.io.InputStream s = null;
java.io.InputStreamReader r = null;
try {
URLConnection uc = new URL(".countryflower.com/Country_Flower_Home_Pic.jpg").openConnection();
s = uc.getInputStream();
System.out.println(uc.getContentLength());

BufferedInputStream buffer = new BufferedInputStream(s);
int n = 0;
String string
File f = new File("c:\\Users\\dell\\Desktop\\image\\image.jpg") ;
DataOutputStream outdata = new DataOutputStream(new FileOutputStream(f));

while(true) {

n = s.read(buffer ); -- here I am confused could you please tell me the method
if (n == -1) break;
if (n == 0) {Thread.sleep(50); continue;}
outdata.write(...);

}



Thank you



outdata.close();

}
finally {
//if (b != null) b.close();
if (r != null) r.close();
if (s != null) s.close();
}


}
}

[sri_reddy523]

import java.net.*;
import java.io.*;
import java.awt.*;
import javax.imageio.*;
class TCPClient6 {
public static void main(String argv[]) throws Exception {

try{

// Construct a URL object
URL url = new URL("//192.168.0.100/oneshotimage.jpg");

// try and get the content type
try{
Object obj = url.getContent();


File f = new File("c:\\Users\\dell\\Desktop\\image\\image.jpg") ;

ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("image.jpg"));
oos.writeObject(obj);
oos.close();



}
catch(IOException e){ System.out.println(e); }
}
catch(MalformedURLException e){ System.out.println(e); }

}
}
hi

I have run above code I got error
Please suggest me...........................

[toadaly]

The logic of this loop is incorrect:

while (n >= 0) {
n = s.read(buffer, 0, buffer.length); 

outdata.write(buffer, 0, buffer.length);
}

You have not accounted for partial reads, which is almost certainly happening for image data. Instead of trying to be aware of the image size, do this:

URLConnection uc = new URL("countryflower.com/Country_Flower_Home_Pic.jpg").openConnection();
s = uc.getInputStream();
System.out.println(uc.getContentLength());
//r = new java.io.InputStreamReader(s);
//b = new java.io.BufferedReader(r);

byte[] buffer = new byte[[b]65536[/b]]; // good arbitary size

File f = new File("c:\\Users\\dell\\Desktop\\image\\image.jpg") ;
DataOutputStream outdata = new DataOutputStream(new FileOutputStream(f));

while (true) {
  int n = s.read(buffer, 0, buffer.length); 

  if(n==-1) 
    break;

  outdata.write(buffer, 0, [b]n[/b]);
}

[sri_reddy523]

:p:) thanks alot