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Mengfei Xia

6 accepted papers

2025

Rectified Diffusion Guidance for Conditional Generation

CVPR 2025poster

Classifier-Free Guidance (CFG), which combines the conditional and unconditional score functions with two coefficients summing to one, serves as a practical technique for diffusion model sampling. Theoretically, however, denoising with CFG cannot be expressed as a reciprocal diffusion process, which…

2024

Exploring Guided Sampling of Conditional GANs

ECCV 2024poster

"Guided sampling serves as a widely used inference technique in diffusion models to trade off sample fidelity and diversity. In this work, we confirm that generative adversarial networks (GANs) can also benefit from guided sampling, not even requiring to pre-prepare a classifier (, classifier guidan…

2024

SMaRt: Improving GANs with Score Matching Regularity

ICML 2024poster

Generative adversarial networks (GANs) usually struggle in learning from highly diverse data, whose underlying manifold is complex. In this work, we revisit the mathematical foundations of GANs, and theoretically reveal that the native adversarial loss for GAN training is insufficient to fix the pro…

2024

Towards More Accurate Diffusion Model Acceleration with A Timestep Tuner

CVPR 2024poster

A diffusion model which is formulated to produce an image using thousands of denoising steps usually suffers from a slow inference speed. Existing acceleration algorithms simplify the sampling by skipping most steps yet exhibit considerable performance degradation. By viewing the generation of diffu…

2023

FEditNet: Few-Shot Editing of Latent Semantics in GAN Spaces

AAAI 2023technical

Generative Adversarial networks (GANs) have demonstrated their powerful capability of synthesizing high-resolution images, and great efforts have been made to interpret the semantics in the latent spaces of GANs. However, existing works still have the following limitations: (1) the majority of works…

2021

Efficient SE(3) Reachability Map Generation via Interplanar Integration of Intra-planar Convolutions

ICRA 2021poster

Convolution has been used for fast computation of reachability maps, but it has high computational costs when performing SE(3) convolution operations for general joint arrangements in industrial robots and 3D workspace. Its application is also limited to planar robots, 2D workspace, or robots with s…

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