Search Results for author: Zhanghan Ke

Found 14 papers, 7 papers with code

Diff-Plugin: Revitalizing Details for Diffusion-based Low-level Tasks

no code implementations1 Mar 2024 Yuhao Liu, Zhanghan Ke, Fang Liu, Nanxuan Zhao, Rynson W. H. Lau

Diffusion models trained on large-scale datasets have achieved remarkable progress in image synthesis.

Image Generation

Recasting Regional Lighting for Shadow Removal

no code implementations1 Feb 2024 Yuhao Liu, Zhanghan Ke, Ke Xu, Fang Liu, Zhenwei Wang, Rynson W. H. Lau

Based on this observation, we propose to condition the restoration of attenuated textures on the corrected local lighting in the shadow region.

Object Shadow Removal

Towards Self-Adaptive Pseudo-Label Filtering for Semi-Supervised Learning

no code implementations18 Sep 2023 Lei Zhu, Zhanghan Ke, Rynson Lau

In this work, we observe that the distribution gap between the confidence values of correct and incorrect pseudo labels emerges at the very beginning of the training, which can be utilized to filter pseudo labels.

Pseudo Label Pseudo Label Filtering

Neural Preset for Color Style Transfer

1 code implementation CVPR 2023 Zhanghan Ke, Yuhao Liu, Lei Zhu, Nanxuan Zhao, Rynson W. H. Lau

In this paper, we present a Neural Preset technique to address the limitations of existing color style transfer methods, including visual artifacts, vast memory requirement, and slow style switching speed.

4k Color Normalization +4

Structure-Informed Shadow Removal Networks

no code implementations9 Jan 2023 Yuhao Liu, Qing Guo, Lan Fu, Zhanghan Ke, Ke Xu, Wei Feng, Ivor W. Tsang, Rynson W. H. Lau

Hence, in this paper, we propose to remove shadows at the image structure level.

Shadow Removal

Harmonizer: Learning to Perform White-Box Image and Video Harmonization

1 code implementation4 Jul 2022 Zhanghan Ke, Chunyi Sun, Lei Zhu, Ke Xu, Rynson W. H. Lau

Unlike prior methods that are based on black-box autoencoders, Harmonizer contains a neural network for filter argument prediction and several white-box filters (based on the predicted arguments) for image harmonization.

Image Harmonization Video Harmonization

MODNet-V: Improving Portrait Video Matting via Background Restoration

1 code implementation24 Sep 2021 Jiayu Sun, Zhanghan Ke, Lihe Zhang, Huchuan Lu, Rynson W. H. Lau

In this work, we observe that instead of asking the user to explicitly provide a background image, we may recover it from the input video itself.

Image Matting Video Matting

Mitigating Intensity Bias in Shadow Detection via Feature Decomposition and Reweighting

no code implementations ICCV 2021 Lei Zhu, Ke Xu, Zhanghan Ke, Rynson W.H. Lau

These two phenomenons reveal that deep shadow detectors heavily depend on the intensity cue, which we refer to as intensity bias.

Shadow Detection

Towards Geometry Guided Neural Relighting with Flash Photography

no code implementations12 Aug 2020 Di Qiu, Jin Zeng, Zhanghan Ke, Wenxiu Sun, Chengxi Yang

By incorporating the depth map, our approach is able to extrapolate realistic high-frequency effects under novel lighting via geometry guided image decomposition from the flashlight image, and predict the cast shadow map from the shadow-encoding transformed depth map.

Image Relighting Intrinsic Image Decomposition

Guided Collaborative Training for Pixel-wise Semi-Supervised Learning

1 code implementation ECCV 2020 Zhanghan Ke, Di Qiu, Kaican Li, Qiong Yan, Rynson W. H. Lau

Although SSL methods have achieved impressive results in image classification, the performances of applying them to pixel-wise tasks are unsatisfactory due to their need for dense outputs.

Image Denoising Image Enhancement +2

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