Search Results for author: Zhangkai Ni

Found 11 papers, 7 papers with code

Octree-GS: Towards Consistent Real-time Rendering with LOD-Structured 3D Gaussians

1 code implementation26 Mar 2024 Kerui Ren, Lihan Jiang, Tao Lu, Mulin Yu, Linning Xu, Zhangkai Ni, Bo Dai

The recent 3D Gaussian splatting (3D-GS) has shown remarkable rendering fidelity and efficiency compared to NeRF-based neural scene representations.

Neural Rendering

Misalignment-Robust Frequency Distribution Loss for Image Transformation

1 code implementation28 Feb 2024 Zhangkai Ni, Juncheng Wu, Zian Wang, Wenhan Yang, Hanli Wang, Lin Ma

This paper aims to address a common challenge in deep learning-based image transformation methods, such as image enhancement and super-resolution, which heavily rely on precisely aligned paired datasets with pixel-level alignments.

Image Enhancement Style Transfer +1

ColNeRF: Collaboration for Generalizable Sparse Input Neural Radiance Field

1 code implementation14 Dec 2023 Zhangkai Ni, Peiqi Yang, Wenhan Yang, Hanli Wang, Lin Ma, Sam Kwong

Through this, we construct a novel collaborative module that aligns information from various views and meanwhile imposes self-supervised constraints to ensure multi-view consistency in both geometry and appearance.

Novel View Synthesis

Glow in the Dark: Low-Light Image Enhancement with External Memory

1 code implementation IEEE Transactions on Multimedia 2023 Dongjie Ye, Zhangkai Ni, Wenhan Yang, Hanli Wang, Shiqi Wang, Sam Kwong

Benefiting from the learned memory, more complex distributions of reference images in the entire dataset can be “remembered” to facilitate the adjustment of the testing samples more adaptively.

Low-Light Image Enhancement

Just Noticeable Difference Modeling for Face Recognition System

no code implementations13 Sep 2022 Yu Tian, Zhangkai Ni, Baoliang Chen, Shurun Wang, Shiqi Wang, Hanli Wang, Sam Kwong

In particular, in order to maximum redundancy removal without impairment of robust identity information, we apply the encoder with multiple feature extraction and attention-based feature decomposition modules to progressively decompose face features into two uncorrelated components, i. e., identity and residual features, via self-supervised learning.

Face Recognition Self-Supervised Learning

High Dynamic Range Image Quality Assessment Based on Frequency Disparity

1 code implementation6 Sep 2022 Yue Liu, Zhangkai Ni, Shiqi Wang, Hanli Wang, Sam Kwong

In this paper, a novel and effective image quality assessment (IQA) algorithm based on frequency disparity for high dynamic range (HDR) images is proposed, termed as local-global frequency feature-based model (LGFM).

Image Quality Assessment Vocal Bursts Intensity Prediction

Cycle-Interactive Generative Adversarial Network for Robust Unsupervised Low-Light Enhancement

no code implementations3 Jul 2022 Zhangkai Ni, Wenhan Yang, Hanli Wang, Shiqi Wang, Lin Ma, Sam Kwong

Getting rid of the fundamental limitations in fitting to the paired training data, recent unsupervised low-light enhancement methods excel in adjusting illumination and contrast of images.

Generative Adversarial Network Low-Light Image Enhancement

Generalized Visual Quality Assessment of GAN-Generated Face Images

no code implementations28 Jan 2022 Yu Tian, Zhangkai Ni, Baoliang Chen, Shiqi Wang, Hanli Wang, Sam Kwong

However, little work has been dedicated to automatic quality assessment of such GAN-generated face images (GFIs), even less have been devoted to generalized and robust quality assessment of GFIs generated with unseen GAN model.

Face Generation Image Quality Assessment +1

CSformer: Bridging Convolution and Transformer for Compressive Sensing

1 code implementation31 Dec 2021 Dongjie Ye, Zhangkai Ni, Hanli Wang, Jian Zhang, Shiqi Wang, Sam Kwong

The proposed approach is an end-to-end compressive image sensing method, composed of adaptive sampling and recovery.

Compressive Sensing Inductive Bias +1

Unpaired Image Enhancement with Quality-Attention Generative Adversarial Network

no code implementations30 Dec 2020 Zhangkai Ni, Wenhan Yang, Shiqi Wang, Lin Ma, Sam Kwong

The key novelty of the proposed QAGAN lies in the injected QAM for the generator such that it learns domain-relevant quality attention directly from the two domains.

Generative Adversarial Network Image Enhancement

Towards Unsupervised Deep Image Enhancement with Generative Adversarial Network

1 code implementation30 Dec 2020 Zhangkai Ni, Wenhan Yang, Shiqi Wang, Lin Ma, Sam Kwong

In this paper, we present an unsupervised image enhancement generative adversarial network (UEGAN), which learns the corresponding image-to-image mapping from a set of images with desired characteristics in an unsupervised manner, rather than learning on a large number of paired images.

Generative Adversarial Network Image Enhancement +1

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