[Johnbot]

Yes, it is possible, and it is legal as long as your onboard computer does not control any power regulating devices (e.g. Jaguars, Victors, Relays, etc.)

Edit:
If you must do this, and you need the driverstation dashbaord to see the image then you might want to consider the following:
- You only save a few bytes if both your onboard computer sends back data directly and your driverstation reads the image. (This assumes the Socket communication doesn't pass through the field when you send it to the cRIO through your radio, if it does, you save nothing)
- You could grab the image on your onboard computer, process it, send data to the cRIO, compress the image, and then host it as a MJPEG stream for the driverstation dashboard to see. (This would save you some bandwidth, as long as your drivers can deal with a more compressed image. Also, it would allow you to process higher quality images without eating up your bandwidth.)