SignMimic: Robust High-Quality Sign Language Motion Generation via Human-Shape-Oblivious Pose Transfer Guidance
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Abstract (arXiv)
We study the challenge of sign language video mimicking: given a driving video and a single reference frame, synthesize a video where the target signer reproduces the source motion while preserving identity and linguistic form. Prior pipelines entangle rigid motion, non-rigid deformation, and view-dependent completion in a monolithic generator, causing handshape drift and spatio-temporal instability. We present SignMimic, which (i) applies a TNet-based model to study SE(3) rigid canonicalization to stabilize global pose, (ii) performs non-rigid adaptation in a canonical space to preserve fine-grained articulators (hands/face) and coarticulation via NIF2D, and (iii) uses Pose-MAE-style completion before conditional video diffusion. This factorization injects geometric and linguistic priors, yielding shape and spatio-temporal consistency. On several large-scale datasets (ASL 50K, How2Sign, CSL News), SignMimic achieves state-of-the-art-level performance on video quality, identity similarity, and frame continuity while also achieving minimal loss when performing back translation (SLT) on generated videos. Ablations confirm the role of rigid canonicalization, non-rigid adaptation, and completion. Code is available at https://anonymous.4open.science/r/UniSignMimicTurbo-6088; model checkpoints and video examples will be released.
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References · 32
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20 more
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- 2026SignRefine: Adapting Foundational Video Models for Sign Language Generation
- 2026SignRR: Retrieve and Refine Real Motion for Sign Language Production
- 2026SignSparK: Efficient Multilingual Sign Language Production via Sparse Keyframe Learning
- 2025Advanced Sign Language Video Generation with Compressed and Quantized Multi-Condition Tokenization
- 2026M3T: Discrete Multi-Modal Motion Tokens for Sign Language Production
- 2024Discrete to Continuous: Generating Smooth Transition Poses from Sign Language Observation
- 2023SignDiff: Diffusion Model for American Sign Language Production
- 2025Text-Driven 3D Hand Motion Generation from Sign Language Data