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Kelvin C.K. Chan

16 accepted papers

2025

A Simple Approach to Unifying Diffusion-based Conditional Generation

ICLR 2025poster

Recent progress in image generation has sparked research into controlling these models through condition signals, with various methods addressing specific challenges in conditional generation. Instead of proposing another specialized technique, we introduce a simple, unified framework to handle dive…

Cited by 1SourcePDFScholar
2025

From Prompt to Progression: Taming Video Diffusion Models for Seamless Attribute Transition

ICCV 2025poster

Existing models often struggle with complex temporal changes, particularly when generating videos with gradual attribute transitions.The most common prompt interpolation approach for motion transitions often fails to handle gradual attribute transitions, where inconsistencies tend to become more pro…

Cited by 0SourcePDFScholar
2025

HoliGS: Holistic Gaussian Splatting for Embodied View Synthesis

NeurIPS 2025poster

We propose HoliGS, a novel deformable Gaussian splatting framework that addresses embodied view synthesis from long monocular RGB videos. Unlike prior 4D Gaussian splatting and dynamic NeRF pipelines, which struggle with training overhead in minute-long captures, our method leverages invertible Gaus…

Cited by 0SourceScholar
2024

Dual Associated Encoder for Face Restoration

ICLR 2024poster

Restoring facial details from low-quality (LQ) images has remained challenging due to the nature of the problem caused by various degradations in the wild. The codebook prior has been proposed to address the ill-posed problems by leveraging an autoencoder and learned codebook of high-quality (HQ) f…

2024

Improving Subject-Driven Image Synthesis with Subject-Agnostic Guidance

CVPR 2024poster

In subject-driven text-to-image synthesis the synthesis process tends to be heavily influenced by the reference images provided by users often overlooking crucial attributes detailed in the text prompt. In this work we propose Subject-Agnostic Guidance (SAG) a simple yet effective solution to remedy…

Cited by 2SourcePDFScholar
2024

Instruct-Imagen: Image Generation with Multi-modal Instruction

CVPR 2024poster

This paper presents Instruct-Imagen a model that tackles heterogeneous image generation tasks and generalizes across unseen tasks. We introduce multi-modal instruction for image generation a task representation articulating a range of generation intents with precision. It uses natural language to am…

Cited by 42SourcePDFScholar
2023

Collaborative Diffusion for Multi-Modal Face Generation and Editing

CVPR 2023poster

Diffusion models arise as a powerful generative tool recently. Despite the great progress, existing diffusion models mainly focus on uni-modal control, i.e., the diffusion process is driven by only one modality of condition. To further unleash the users' creativity, it is desirable for the model to…

2023

Exploring CLIP for Assessing the Look and Feel of Images

AAAI 2023technical

Measuring the perception of visual content is a long-standing problem in computer vision. Many mathematical models have been developed to evaluate the look or quality of an image. Despite the effectiveness of such tools in quantifying degradations such as noise and blurriness levels, such quantifica…

2023

ProPainter: Improving Propagation and Transformer for Video Inpainting

ICCV 2023poster

Flow-based propagation and spatiotemporal Transformer are two mainstream mechanisms in video inpainting (VI). Despite the effectiveness of these components, they still suffer from some limitations that affect their performance. Previous propagation-based approaches are performed separately either in…

Cited by 104PDFcodeScholar
2022

BasicVSR++: Improving Video Super-Resolution With Enhanced Propagation and Alignment

CVPR 2022poster

A recurrent structure is a popular framework choice for the task of video super-resolution. The state-of-the-art method BasicVSR adopts bidirectional propagation with feature alignment to effectively exploit information from the entire input video. In this study, we redesign BasicVSR by proposing se…

Cited by 541PDFcodeScholar
2022

Investigating Tradeoffs in Real-World Video Super-Resolution

CVPR 2022poster

The diversity and complexity of degradations in real-world video super-resolution (VSR) pose non-trivial challenges in inference and training. First, while long-term propagation leads to improved performance in cases of mild degradations, severe in-the-wild degradations could be exaggerated through…

Cited by 125PDFcodeScholar
2022

Towards Robust Blind Face Restoration with Codebook Lookup Transformer

NeurIPS 2022accept

Blind face restoration is a highly ill-posed problem that often requires auxiliary guidance to 1) improve the mapping from degraded inputs to desired outputs, or 2) complement high-quality details lost in the inputs. In this paper, we demonstrate that a learned discrete codebook prior in a small pro…

2021

BasicVSR: The Search for Essential Components in Video Super-Resolution and Beyond

CVPR 2021poster

Video super-resolution (VSR) approaches tend to have more components than the image counterparts as they need to exploit the additional temporal dimension. Complex designs are not uncommon. In this study, we wish to untangle the knots and reconsider some most essential components for VSR guided by f…

Cited by 598PDFScholar
2021

GLEAN: Generative Latent Bank for Large-Factor Image Super-Resolution

CVPR 2021poster

We show that pre-trained Generative Adversarial Networks (GANs), e.g., StyleGAN, can be used as a latent bank to improve the restoration quality of large-factor image super-resolution (SR). While most existing SR approaches attempt to generate realistic textures through learning with adversarial los…

Cited by 315PDFcodeScholar
2021

Robust Reference-Based Super-Resolution via C2-Matching

CVPR 2021poster

Reference-based Super-Resolution (Ref-SR) has recently emerged as a promising paradigm to enhance a low-resolution (LR) input image by introducing an additional high-resolution (HR) reference image. Existing Ref-SR methods mostly rely on implicit correspondence matching to borrow HR textures from re…

Cited by 105PDFcodeScholar
2021

Understanding Deformable Alignment in Video Super-Resolution

AAAI 2021technical

Deformable convolution, originally proposed for the adaptation to geometric variations of objects, has recently shown compelling performance in aligning multiple frames and is increasingly adopted for video super-resolution. Despite its remarkable performance, its underlying mechanism for alignment…

Cited by 183SourcePDFScholar