Results 101 to 110 of about 792,653 (314)

Extrinsic Camera Calibration Method and Its Performance Evaluation [PDF]

, 2012
This paper presents a method for extrinsic camera calibration (estimation of camera rotation and translation matrices) from a sequence of images. It is assumed camera intrinsic matrix and distortion coefficients are known and fixed during the entire sequence. %This allows to decrease a number of pairs of corresponding keypoints between images needed to
Jacek Komorowski, Przemyslaw Rokita
openaire   +2 more sources

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Online extrinsic calibration between a 3D LiDAR and a monocular camera

, 2022
For autonomous mobile robots, multiple sensors are being widely adopted as a way to enhance the perception ability of the robot. 3D LiDARs and cameras are the most commonly used sensors. A 3D LiDAR provides data in the form of unordered 3D coordinates of
Mharolkar, Sanat Rajesh
core   +1 more source

Noninvasive Characterization of Tumor Heterogeneity in HNSCC: From Clinical Utility to Biological Correlates

Advanced Science, EarlyView.
This study establishes a CT‐based radiomics framework to quantify intratumoral heterogeneity (ITH) in HNSCC. Using unsupervised clustering, tumor ROIs and VOIs are analyzed to calculate 2D/3D ITH scores. The score shows strong predictive value for prognosis and immunotherapy response, and is associated with tumor metabolism and immune microenvironment,
Xinwei Chen, Rui Liu, Yuan Zhou, Yin Xiao, Chengmin Feng, Lin Chen, Yanshi Li, Mengna Wang, Zhaobo Cheng, Yuxi Luo, Long Liu, Lijing Niu, Yue Xiang, Juan Peng, Guohua Hu, Min Pan   +15 more
wiley   +1 more source

Biomimetic Active Stereo Camera System with Variable FOV

Biomimetics
Inspired by the biological eye movements of fish such as pipefish and sandlances, this paper presents a novel dynamic calibration method specifically for active stereo vision systems to address the challenges of active cameras with varying fields of view
Yanmiao Zhou, Xin Wang
doaj   +1 more source

A new hybrid calibration method for extrinsic camera parameters and hand-eye transformation

, 2005
In this paper, a new calibration method is proposed, which combines the extrinsic camera calibration and the robot hand-eye calibration. The advantage of this method is that it eliminates the errors and difficulties by solving complex equations such as ...
Xu F(徐方), Qu DK(曲道奎), Wang JT(王金涛)   +2 more
core  

Large Temperature‐invariant Anomalous Nernst Effect in Non‐collinear Antiferromagnet Mn3Pt

Advanced Science, EarlyView.
Based on the noncollinear antiferromagnetic Mn3Pt thin films, the composition‐tunable Mn‐3d orbital states directly govern the Berry curvature. As a result, a giant and temperature‐invariant anomalous Nernst coefficient of 0.71 µV/K is achieved under Mn‐rich conditions.
Pengwei Gong, Xiaolin Zhang, Wei Zhu, Mingzhi Wang, Chang Pan, Aoqi Xu, Yandong Guo, Yuheng Li, Jiaxin Chen, Yanchang Zhou, Zhong Shi, Dingfu Shao, Liang Liu, Shiming Zhou, Yicheng Guan, Ruiqing Cheng, Xuepeng Qiu   +16 more
wiley   +1 more source

Automatic extrinsic calibration of display-camera system using an annular mirror

, 2015
Our work focuses on the extrinsic calibration of a display-camera system where the camera has no direct view of the display. An annular planar mirror is used to reflect the display so that the camera can capture the reflection images. The position of the
Xia RB(夏仁波), Fu SP(付生鹏), Zhao JB(赵吉宾), Liu WJ(刘伟军)   +3 more
core  

Molecular Engineering Mediated Interfacial Assembly as an Artificial Extracellular Matrix Remolds Bacteria With Enhanced Abiotic Resilience

Advanced Science, EarlyView.
A biomimetic artificial extracellular matrix is assembled directly on Pseudomonas fluorescens by co‐assembling amyloid‐like lysozyme and alginate at the cell surface. This conformal nanocoating acts as both a hydration buffer and a physiological priming layer, markedly enhancing desiccation tolerance, seed adhesion, storage stability, and biocontrol ...
Yuanyuan Wang, Zili Jia, Yang Li, Qitao Wang, Shuai Hou, Lei Liu   +5 more
wiley   +1 more source

A Convenient Calibration Method for LRF-Camera Combination Systems Based on a Checkerboard

Sensors, 2019
In this paper, a simple and easy high-precision calibration method is proposed for the LRF-camera combined measurement system which is widely used at present.
Zhuang Zhang, Rujin Zhao, Enhai Liu, Kun Yan, Yuebo Ma   +4 more
doaj   +1 more source