バッファリングされたイメージがnullです

Question

私はpythonアプリケーションからjavaアプリケーションにフレームを送信しようとしています。まず、私はnumpyの配列でPython側に空のイメージを作成し、Javaアプリケーションに送信してJava側に表示したいと考えています。しかし、Java側のバッファリングされた画像は、ここではPythonコードですnullです。

import socket 
import sys 
import cv2 
import numpy as np 
import base64 
import json 
from lib2to3.pytree import Leaf 
from lib2to3.fixer_util import String 

socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
HOST = "localhost" 
PORT = 5555 
try: 
    socket.connect((HOST, PORT)) 
except: 
    print "We cannot find the server !!!!" 
    print "Terminating the program . . ." 
    #exit(0) 

img = np.zeros((300, 300, 3), np.uint8) 
obj = NumpyEncoder() 
outjson = {} 
outjson['img'] = base64.b64encode(img) 
outjson['leaf'] = "leaf" 
json_data = json.dumps(outjson) 
socket.sendall(json_data 

socket.close() 

ここではJava側です。

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.FlowLayout; 
import java.awt.image.BufferedImage; 
import java.io.BufferedReader; 
import java.io.ByteArrayInputStream; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.ServerSocket; 
import java.net.Socket; 
import java.util.Base64; 

import javax.imageio.ImageIO; 
import javax.swing.ImageIcon; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 

import org.json.JSONException; 
import org.json.JSONObject; 

import com.sun.javafx.iio.ImageFormatDescription; 
import com.sun.prism.Image; 

import java.awt.Color; 
import java.awt.Dimension; 

public class ServerFrame extends JFrame { 

private JPanel contentPane; 
public static BufferedImage bufferedImage; 

/** 
* Launch the application. 
* @throws IOException 
* @throws JSONException 
*/ 
public static void main(String[] args) throws IOException, JSONException { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       ServerFrame frame = new ServerFrame(); 
       frame.setVisible(true); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 

    ServerSocket serverSocket = null; 
    Socket clientSocket = null; 


    try { 
     serverSocket = new ServerSocket(5555); 
    } catch(IOException e) { 
     System.out.println(e.getMessage()); 
     System.exit(1); 
    } 

    System.out.println("Server Socket Has Been Started . . ."); 
    try { 
     clientSocket = serverSocket.accept(); 
     System.out.println("User Connected :" + clientSocket.getLocalAddress().toString()); 

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

    StringBuilder sb = new StringBuilder(); 
    InputStream in = clientSocket.getInputStream(); 
    if(in == null) System.exit(1); 
    BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); 
    String line; 
    while ((line = br.readLine()) != null) { 
      sb.append(line); 
     } 
    //System.out.println(sb.toString()); 

    JSONObject json = new JSONObject(sb.toString()); 
    String leaf_name = json.getString("leaf"); 
    String mat_string = json.getString("img"); 
    byte[] raw_data = Base64.getDecoder().decode(mat_string); 
    bufferedImage = ImageIO.read(new ByteArrayInputStream(raw_data)); 
    if(bufferedImage == null) System.out.println("warning"); 
    System.out.println(raw_data.length); 
    FileOutputStream fos = new FileOutputStream("image.jpg"); 
    try { 
     fos.write(raw_data); 
    } 
    finally { 
     fos.close(); 
    } 
    /*JPanel panel = new JPanel(); 
    panel.setBackground(Color.RED); 
    Dimension dim = new Dimension(50,50); 
    panel.setSize(dim); 
    panel.setMinimumSize(dim); 
    panel.setMaximumSize(dim); 
    panel.setPreferredSize(dim); 
    JLabel label = new JLabel("hello"); 
    label.setSize(label.getPreferredSize()); 
    panel.add(label); 
    panel.setVisible(true); 
    JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(bufferedImage)));*/ 
    br.close(); 
    clientSocket.close(); 
} 

/** 
* Create the frame. 
*/ 
public ServerFrame() { 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    setBounds(100, 100, 450, 300); 
    contentPane = new JPanel(); 
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    contentPane.setLayout(new BorderLayout(0, 0)); 
    setContentPane(contentPane); 
} 

} 

問題が表示されるのはなぜですか？

Answer 1

変化：

outjson['img'] = base64.b64encode(img.tobytes())