[kamocat]

That is a thorough description of how to send the camera image using the Dashboard High Priority data.
Unfortunately, that's not what I'm asking.
The "send image 2 PC" VI called in the "Open Camera" VI sends the camera image, still compressed, to the Driver Station IP address on TCP port 1180.
This works with the default dashboard. I see advantage in using the default dashboard.

What I plan to do is modify the "send image 2 PC" so that I can send modified images (showing the target as a green rectangle) when I'm processing to find the target, and send the normal image when I'm not.

In order for the Driver Station to receive these modified images as it normally does, they need to be encoded the same way. THAT is what I'm having trouble with.