I don't know why you would want to send that when they have an infrared-spectrum mindreader on the other side, but yes, you could...Of course, we could imagine a viewscreen that also sends infrared images.Which would make Troi not particularly useful when dealing with someone over a viewscreen.![]()
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Viewscreens need to work entirely different in Trek. First of all, humans only need 15-25 frames per second to view a smooth motion, but what about other aliens? Some of them might need 200 fps, who knows? Some of them might see other spectrums. Starfleet certainly would combine human and alien technologies to create a one-for-all system. Then they are 3-dimensional, like the walls of a holodeck. And then Geordi is able to look at the viewscreen and recognizes stuff normal humans can't see. And in a few episodes it was suggested that the actual image is a reconstruction based on sensor data (Worf was able to fake an attack of a Romulan Warbird because of that).