Search Results for author: Ziyi Chang

Found 6 papers, 3 papers with code

Hard No-Box Adversarial Attack on Skeleton-Based Human Action Recognition with Skeleton-Motion-Informed Gradient

1 code implementation ICCV 2023 Zhengzhi Lu, He Wang, Ziyi Chang, Guoan Yang, Hubert P. H. Shum

Specifically, we first learn a motion manifold where we define an adversarial loss to compute a new gradient for the attack, named skeleton-motion-informed (SMI) gradient.

Action Recognition Adversarial Attack +2

On the Design Fundamentals of Diffusion Models: A Survey

no code implementations7 Jun 2023 Ziyi Chang, George Alex Koulieris, Hubert P. H. Shum

Diffusion models are generative models, which gradually add and remove noise to learn the underlying distribution of training data for data generation.

Unifying Human Motion Synthesis and Style Transfer with Denoising Diffusion Probabilistic Models

1 code implementation16 Dec 2022 Ziyi Chang, Edmund J. C. Findlay, Haozheng Zhang, Hubert P. H. Shum

To achieve high-quality results, we design a multi-task architecture of diffusion model that strategically generates aspects of human motions for local guidance.

Denoising Motion Synthesis +1

3D Reconstruction of Sculptures from Single Images via Unsupervised Domain Adaptation on Implicit Models

1 code implementation9 Oct 2022 Ziyi Chang, George Alex Koulieris, Hubert P. H. Shum

Acquiring the virtual equivalent of exhibits, such as sculptures, in virtual reality (VR) museums, can be labour-intensive and sometimes infeasible.

3D Reconstruction Unsupervised Domain Adaptation

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