Results 91 to 100 of about 3,061 (275)

Efficient Inter-Prediction Method Using Reference Frame Accumulation for MPEG G-PCC

IEEE Access
This paper presents a novel hybrid reference frame generation method to enhance the inter-prediction performance of geometry-based point cloud compression (G-PCC), a recent point cloud coding standard developed by the moving picture experts group (MPEG ...
Xin Li, Eun-Young Chang, Jihun Cha, Euee S. Jang   +3 more
doaj   +1 more source

Transferable Deep Reinforcement Learning With Edge‐Contour‐Depth Fusion for Autonomous Wireless Capsule Endoscopy Navigation

Advanced Science, EarlyView.
This study presents an anatomical landmark‐guided DRL framework for autonomous wireless capsule endoscopy navigation. Using a lightweight edge‐contour‐depth fusion module, it achieves over 97% coverage across diverse gastric anatomies. To ensure reliability, a two‐stage sim‐to‐real pipeline with an adaptive dynamic programming controller mitigates ...
Haoxuan Wu, Haitao Gao, Qingyang Liu, Sishen Yuan, Haiyang Fang, Mingwu Su, Baijia Liang, Yongzun Yang, Long Bai, Wenzhen Dong, Dihong Xie, Shijian Su, Jiewen Lai, Shing Shin Cheng, Zhen Li, Xiuli Zuo, Hongliang Ren   +16 more
wiley   +1 more source

Low-Altitude UAV Photogrammetry for Large-Scale Scene Reconstruction With Gaussian-Splatting Representation

IEEE Access
Aerial drone imagery has emerged as a predominant solution for urban 3D modeling, with differentiable rendering techniques being particularly valuable for smart cities and digital twins.
Yuan Mei, Rui Zeng, Wanting Xu, Xinyue Zhou   +3 more
doaj   +1 more source

Efficient Electrocatalytic Conversion of CO2 to Pure Formic Acid Solutions via Strain‐Engineered Bismuth Nanosheets

Advanced Science, EarlyView.
Tensile‐strained bismuth nanosheets (TS‐BiNs) achieve a formate Faradaic efficiency of 92% at −1000 mA cm−2 and enable stable production of pure formic acid (HCOOH) in a solid‐state electrolyte reactor. Theoretical calculations reveal that the introduced strain lowers the energy barrier for *OCHO intermediate formation, fundamentally enhancing the ...
Shiqi Li, Yuefeng Zhang, Panzhe Qiao, Cuo Wu, Xinya Tian, Yufeng Xu, Yun Zhang, Peng Wang, Tingting Li, Muhammad Afaq, Xinlin Luo, Tang Wang, Chunxiao Liu, Zi‐You Yu, Chuan Xia, Min‐Rui Gao, Zhen‐Yu Wu   +16 more
wiley   +1 more source

Enhancing Li‐S Battery Performance Through Low‐Concentration Electrolytes with Organic Se/Te Co‐Additives to Address Solubility and Kinetic Challenges

Advanced Science, EarlyView.
This work presents a low‐concentration electrolyte enabled by hybrid organic Se/Te additives (DPDSe/DPDTe) that restructures solvation, boosts polysulfide dissolution, and provides dual‐site synergistic catalysis, delivering high capacity and stable cycling in Li–S coin and pouch cells, supporting high‐energy, high‐power operation.
Ruihua Li, Haiwei Wu, Hairu Wei, Wenhao Jia, Frederik Bettels, Leon Schenk, Zhihua Lin, Hanbin Liu, Guodong Liu, Zhijian Li, Lin Zhang   +10 more
wiley   +1 more source

Optimized quantization parameter selection for video-based point cloud compression

Frontiers in Signal Processing
Point clouds are sets of points used to visualize three-dimensional (3D) objects. Point clouds can be static or dynamic. Each point is characterized by its 3D geometry coordinates and attributes such as color.
Hui Yuan, Raouf Hamzaoui, Ferrante Neri, Shengxiang Yang, Xin Lu, Linwei Zhu, Yun Zhang   +6 more
doaj   +1 more source

Intra-Frame Context-Based Octree Coding for Point-Cloud Geometry

, 2018
3D and free-viewpoint video has been slowly adopting a solid representation, such as using meshes and point-clouds. Among other characteristics, meshes provide direct surface representation, while point-cloud processing requires less computation.
Diogo C. Garcia, Garcia, Diogo Caetano, Queiroz, Ricardo Lopes de, Ricardo L. de Queiroz   +3 more
core   +1 more source

Defect Driven Electronic Structure Reconfiguration and Hierarchical Phonon Suppression in Ag2Se Thermoelectrics

Advanced Science, EarlyView.
Indium substitution in Ag2Se nanocrystals simultaneously tailors electronic structure and lattice dynamics. Fermi‐level upshift and band‐gap narrowing enhance electrical transport, while defect‐induced lattice softening intensifies phonon scattering and suppresses lattice thermal conductivity.
Yineng Gou, Mengyao Li, Fang Lyu, Xiaolong Sun, Muyang Huang, Wenhao Xie, Liangwei Hu, Wei Cao, Yue Hou, Yong Liu, Andreu Cabot, Ziyu Wang   +11 more
wiley   +1 more source

Eye-Tracking, Quality Assessment, and QoE Prediction Models for Point Cloud Videos: Extended Analysis of the ComPEQ-MR Dataset

IEEE Access
Point cloud videos, also termed dynamic point clouds (DPCs), have the potential to provide immersive experiences with six degrees of freedom (6DoF). However, there are still several open issues in understanding the Quality of Experience (QoE) and visual ...
Shivi Vats, Minh Nguyen, Christian Timmerer, Hermann Hellwagner   +3 more
doaj   +1 more source

TOWARDS ACCURATE RATE ESTIMATION FOR 3D POINT CLOUD COMPRESSION BY TSPLVQ

, 2021
International audiencePoint clouds are widely emerged as a promising 3D visual representation model for immersive and high quality experiences using dense point cloud.
Normand, Nicolas, Ricordel, Vincent, Filali, Amira   +2 more
core