“Stranger Things” star Millie Bobby Brown is set to star in many upcoming films, but some Star Wars fans wouldn’t mind her playing Princess Leia, and these AI-generated deepfakes show why. Deepfakes make use of a neural network called an autoencoder, which reduces an image to a lower dimensional latent space, and a decoder, which reconstructs the image from the latent representation. They use this technique to encode a person into the latent space.
The latent representation contains key features about their facial features and body posture that is then decoded with a model trained specifically for the target. This allows the neural network to superimpose that information on the underlying facial and body features of the original video, represented in the latent space. Some attach a GAN (generative adversarial network) to the decoder, allowing it to create new images from the latent representation of the source material, while the discriminator attempts to determine whether or not the image is generated.
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At some point in time we are going to either recast or totally CGI parts of actors if you ever want to see them younger or a prequel of a movie they were in or unfortunately great actors we have lost, maybe to ever see them again,” said creator of these videos.
