Search Results for author: Xiaozhong Xu

Found 16 papers, 3 papers with code

Contrastive Pre-Training with Multi-View Fusion for No-Reference Point Cloud Quality Assessment

no code implementations15 Mar 2024 Ziyu Shan, Yujie Zhang, Qi Yang, Haichen Yang, Yiling Xu, Jenq-Neng Hwang, Xiaozhong Xu, Shan Liu

Furthermore, in the model fine-tuning stage, we propose a semantic-guided multi-view fusion module to effectively integrate the features of projected images from multiple perspectives.

Philosophy Point Cloud Quality Assessment

Transferable Learned Image Compression-Resistant Adversarial Perturbations

no code implementations6 Jan 2024 Yang Sui, Zhuohang Li, Ding Ding, Xiang Pan, Xiaozhong Xu, Shan Liu, Zhenzhong Chen

Adversarial attacks can readily disrupt the image classification system, revealing the vulnerability of DNN-based recognition tasks.

Adversarial Attack Autonomous Driving +4

Full-reference Video Quality Assessment for User Generated Content Transcoding

no code implementations19 Dec 2023 Zihao Qi, Chen Feng, Duolikun Danier, Fan Zhang, Xiaozhong Xu, Shan Liu, David Bull

In this work, we observe that existing full-/no-reference quality metrics fail to accurately predict the perceptual quality difference between transcoded UGC content and the corresponding unpristine references.

Video Quality Assessment Visual Question Answering (VQA)

Corner-to-Center Long-range Context Model for Efficient Learned Image Compression

no code implementations29 Nov 2023 Yang Sui, Ding Ding, Xiang Pan, Xiaozhong Xu, Shan Liu, Bo Yuan, Zhenzhong Chen

To tackle this issue, we conduct an in-depth analysis of the performance degradation observed in existing parallel context models, focusing on two aspects: the Quantity and Quality of information utilized for context prediction and decoding.

Image Compression

SJTU-TMQA: A quality assessment database for static mesh with texture map

no code implementations27 Sep 2023 Bingyang Cui, Qi Yang, Kaifa Yang, Yiling Xu, Xiaozhong Xu, Shan Liu

However, little research has been done on the quality assessment of textured meshes, which hinders the development of quality-oriented applications, such as mesh compression and enhancement.

GeodesicPSIM: Predicting the Quality of Static Mesh with Texture Map via Geodesic Patch Similarity

no code implementations9 Aug 2023 Qi Yang, Joel Jung, Xiaozhong Xu, Shan Liu

A two-step patch cropping algorithm and a patch texture mapping module refine the size of 1-hop geodesic patches and build the relationship between the mesh geometry and color information, resulting in the generation of 1-hop textured geodesic patches.

TSMD: A Database for Static Color Mesh Quality Assessment Study

no code implementations3 Aug 2023 Qi Yang, Joel Jung, Haiqiang Wang, Xiaozhong Xu, Shan Liu

Static meshes with texture map are widely used in modern industrial and manufacturing sectors, attracting considerable attention in the mesh compression community due to its huge amount of data.

TDMD: A Database for Dynamic Color Mesh Subjective and Objective Quality Explorations

no code implementations3 Aug 2023 Qi Yang, Joel Jung, Timon Deschamps, Xiaozhong Xu, Shan Liu

Dynamic colored meshes (DCM) are widely used in various applications; however, these meshes may undergo different processes, such as compression or transmission, which can distort them and degrade their quality.

Once-Training-All-Fine: No-Reference Point Cloud Quality Assessment via Domain-relevance Degradation Description

no code implementations4 Jul 2023 Yipeng Liu, Qi Yang, Yujie Zhang, Yiling Xu, Le Yang, Xiaozhong Xu, Shan Liu

Second, to reduce the significant domain discrepancy, we establish an intermediate domain, the description domain, based on insights from subjective experiments, by considering the domain relevance among samples located in the perception domain and learning a structured latent space.

Point Cloud Quality Assessment regression

Reconstruction Distortion of Learned Image Compression with Imperceptible Perturbations

no code implementations1 Jun 2023 Yang Sui, Zhuohang Li, Ding Ding, Xiang Pan, Xiaozhong Xu, Shan Liu, Zhenzhong Chen

Learned Image Compression (LIC) has recently become the trending technique for image transmission due to its notable performance.

Image Compression Image Reconstruction

GPA-Net:No-Reference Point Cloud Quality Assessment with Multi-task Graph Convolutional Network

no code implementations29 Oct 2022 Ziyu Shan, Qi Yang, Rui Ye, Yujie Zhang, Yiling Xu, Xiaozhong Xu, Shan Liu

To extract effective features for PCQA, we propose a new graph convolution kernel, i. e., GPAConv, which attentively captures the perturbation of structure and texture.

Philosophy Point Cloud Quality Assessment

TCDM: Transformational Complexity Based Distortion Metric for Perceptual Point Cloud Quality Assessment

1 code implementation10 Oct 2022 Yujie Zhang, Qi Yang, Yifei Zhou, Xiaozhong Xu, Le Yang, Yiling Xu

The goal of objective point cloud quality assessment (PCQA) research is to develop quantitative metrics that measure point cloud quality in a perceptually consistent manner.

Point Cloud Quality Assessment

Enhancing HDR Video Compression through CNN-based Effective Bit Depth Adaptation

1 code implementation18 Jul 2022 Chen Feng, Zihao Qi, Duolikun Danier, Fan Zhang, Xiaozhong Xu, Shan Liu, David Bull

In this work, we modify the MFRNet network architecture to enable multiple frame processing, and the new network, multi-frame MFRNet, has been integrated into the EBDA framework using two Versatile Video Coding (VVC) host codecs: VTM 16. 2 and the Fraunhofer Versatile Video Encoder (VVenC 1. 4. 0).

Video Compression

Recent Standard Development Activities on Video Coding for Machines

no code implementations26 May 2021 Wen Gao, Shan Liu, Xiaozhong Xu, Manouchehr Rafie, Yuan Zhang, Igor Curcio

Specifically, we will first provide an overview of the MPEG VCM group including use cases, requirements, processing pipelines, plan for potential VCM standards, followed by the evaluation framework including machine-vision tasks, dataset, evaluation metrics, and anchor generation.

object-detection Object Detection

Tencent Video Dataset (TVD): A Video Dataset for Learning-based Visual Data Compression and Analysis

no code implementations12 May 2021 Xiaozhong Xu, Shan Liu, Zeqiang Li

Learning-based visual data compression and analysis have attracted great interest from both academia and industry recently.

4k Data Compression +2

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