Expression Transfer
In short: Expression transfer is the process of copying facial expressions from one face to another in video, enabling one person's performance to drive another person's facial movements.
About Expression Transfer
Expression transfer captures the full range of facial expressions from a source video, including eyebrow raises, smiles, frowns, and eye movements, and applies them to a target face while preserving the target's identity. This technology is related to but distinct from lip sync: while lip sync focuses specifically on matching mouth movements to audio, expression transfer replicates the complete emotional performance.
Some advanced lip sync pipelines incorporate expression transfer to ensure that the emotional context of speech, like a smile while speaking, is preserved in the output alongside accurate mouth movements.
How Expression Transfer Connects to Lip Sync
Expression Transfer relates to several other concepts in the AI lip sync pipeline: Facial Reanimation , and Facial Motion Capture .
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