MATLAB: How can i send image using UDP in Matlab code

udp image send from matlab

I want to create UDP communication between Java and Matlab. Matlab is us a server and while Java is the client. The client asks to the server to image. How can I write a code in Matlab to send the image to the client?

Best Answer

If you have Instrument Control Toolbox, you can use this functionality:

https://www.mathworks.com/help/instrument/tcp-ip-and-udp-interface.html

- Sebastian

Related Solutions

MATLAB: Does UDP read not return a full datagram

The 256 value that that is observed here is actually the number of values read from the UDP object, not the number of bytes read. Since the bytes being read were interpreted as 'int16' values, each value being read consisted of 2 bytes (16 bits), so we are actually reading 2*256 = 512 bytes from the UDP object. Note that this can also be applied to the UDP sender: we are writing 1024 values each represented by 2-bytes, so our write operation is actually writing 2048 bytes.

The reason we are reading only 512 bytes instead of the expected 1024-byte-long datagram we expected is because the default OutputDatagramPacketSize is 512-bytes, so the UDP sender is only sending 512-byte datagrams. If we change this property:

>> udps.OutputDatagramPacketSize = 1024;

We will be able to read the expected 1024-byte packets.

For more information on how read and write operations work in the UDP interface, refer to the following documentation:

https://www.mathworks.com/help/instrument/rules-for-completing-read-and-write-operations-over-tcpip-and-udp.html

MATLAB: How to receive UDP broadcast data in MATLAB using Instrument Control Toolbox

You can receive UDP broadcast data using the UDP functionality in Instrument Control Toolbox.

If you are only receiving UDP packets, and not sending out any UDP packets, the only relevant properties of the UDP object are LocalHost and LocalPort; the RemoteHost and RemotePort are not relevant in this case.

LocalHost is the host name or IP address of the Ethernet adapter you are receiving the UDP packets on, and the LocalPort is the port number you are receiving the UDP packets on.

Note: If you don't specify LocalHost (or if you set it to an empty string), you will receive UDP packets on all available Ethernet interfaces at the specified LocalPort.

% Listen on all available Ethernet interfaces at local port 8000.
% Specify a LocalHost (host name or IP address) if known
u = udp('', 'LocalHost', '', 'LocalPort', 8000);
fopen(u);
% Receive a single UDP packet
packetData = fread(u);
% Clean up
fclose(u);
delete(u);
clear u

Best Answer

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MATLAB: Does UDP read not return a full datagram

MATLAB: How to receive UDP broadcast data in MATLAB using Instrument Control Toolbox

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