I think it was in the 90s when I read about neural nets being used to correlate air plane type to a static silhouette (might have been radar) from any angle. Of

I think it was in the 90s when I read about neural nets being used to correlate air plane type to a static silhouette (might have been radar) from any angle. Of course, airplanes can't be slightly modified and printed out in minutes, so I'm not sure this would work here, or how much of a PITA constantly retraining the neural net when new schematics are made would be.