PC端使用opencv获取webcam，通过socket把Mat图像传输到android手机端

demo效果图：

PC端

android端

大体流程

主要代码

android端

private Runnable mythread = new Runnable(){

@Override
public void run() {
// TODO Auto-generated method stub
try {
ServerSocket serverSocket =new ServerSocket(3200);
Log.i("start server", "start server ------port :3200");
while (true) {
Socket socket =serverSocket.accept();
new server(socket ,imageView).start();

}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

public void startserver(View v) {

Thread thread1 = new Thread(mythread, "thread1");
thread1.start();

}

public class server extends Thread {
private ImageView imageView;
private Socket socket;
public static byte imageByte[];
private Handler handler;

class MyHandler extends Handler{
public MyHandler(Looper looper){
super(looper);
}
public void handleMessage(Message msg){
super.handleMessage(msg);
imageView.setImageBitmap((Bitmap)msg.obj);

}
}

public void run() {
Looper looper = Looper.getMainLooper(); //主线程的Looper对象
handler = new MyHandler(looper);
try {
int imageSize=230400;//expected image size 640X480X3
InputStream in = socket.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buffer[] = new byte[1024];
int remainingBytes = imageSize; //
while (remainingBytes > 0) {
int bytesRead = in.read(buffer);
if (bytesRead < 0) {
throw new IOException("Unexpected end of data");
}
baos.write(buffer, 0, bytesRead);
remainingBytes -= bytesRead;
}
in.close();
imageByte = baos.toByteArray();
baos.close();
socket.close();//关闭socket，一次连接传一幅图像            int nrOfPixels = imageByte.length / 3; // Three bytes per pixel.
int pixels[] = new int[nrOfPixels];
for(int i = 0; i < nrOfPixels; i++) {
int r = imageByte[3*i];
int g = imageByte[3*i + 1];
int b = imageByte[3*i + 2];
if (r < 0)
r = r + 256; //Convert to positive
if (g < 0)
g = g + 256; //Convert to positive
if (b < 0)
b = b + 256; //Convert to positive
pixels[i] = Color.rgb(b,g,r);
}

Bitmap bitmap = Bitmap.createBitmap(pixels, 320, 240, Bitmap.Config.ARGB_8888);

Message msg = handler.obtainMessage();
msg.obj = bitmap;
handler.sendMessage(msg);//图像已经转换好了，发送消息给UI线程更新图像

} catch (Exception e) {
// TODO: handle exception
}

PC端

VideoCapture cap(0);                        /* open webcam */
if(!cap.isOpened())
{
return -1;
}
Mat frame;
cap.set(CV_CAP_PROP_FRAME_WIDTH, 320);      /* set width */
cap.set(CV_CAP_PROP_FRAME_HEIGHT, 240);     /* set height */

try
{
boost::asio::io_service io_service;
tcp::endpoint end_point(boost::asio::ip::address::from_string(argv[1]), 3200);

tcp::socket socket(io_service);

boost::system::error_code ignored_error;

while (true)
{
cap>>frame;

imshow("client",frame);

char c=(char)waitKey(100);
if (c==27)
{
break;
}

frame = (frame.reshape(0,1)); // to make it continuous
socket.connect(end_point);
std::string message((char *)frame.data,230400); /* the size of mat data is 320*240*3 */
socket.write_some(boost::asio::buffer(message), ignored_error);
cout<<"send image finished"<<endl;

socket.close();

}
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
}