How I can read video frame in niosII for image processing

Hi,

It depend on the kind of processing but for full image transformation with simple operations, a streaming module would be more efficient.

Yet for NiosII access to frame:

You should know when the image buffer is located in memory.

Link the AvalonMM data bus of NiosII to that memory.

Use IORD and IOWR to change the content.

To send it over the ethernet, you can use sockets base on the InterNiche stack for example, you need to look to samples using it.