检索结果-内蒙古大学图书馆

IET Conference on Wireless, Mobile and Sensor Networks 2007, CCWMSN'07

作者： Liu, Suxing An, Ping Zhang, Zhaoyang Liu, Zhanwei School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9780863418365

Aiming at fully exploiting the temporal redundancy and spatial redundancy, we propose a multi-view video coding scheme based on resultant vector estimation. Combining the disparity vector and motion vector as one vector, the novel "resultant vector" was first proposed. Meanwhile, by extending the loop constraint to multi-view images for a parallel camera geometry model, redundancy between views is greatly reduced by utilizing the linear relationship of adjacent views and the "resultant vector". Experimental results show that our scheme's performance is superior to conventional methods such as GOP (Group-of-picture) or M-picture. Coding efficiency is improved about 1.2-1.5 dB.

关键词： Vectors

来源：评论

学校读者我要写书评

暂无评论

Uncalibrated camera vision pointing recognition for HCI

Uncalibrated camera vision pointing recognition for HCI

引用

International Conference on Computational Science and Engineering

作者： Guan, Ye-Peng School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9780769543239

Among gestures in non-verbal communication, pointing gesture can be taken as one of natural human computer interfaces. Vision based hand pointing is an optimal model for human-computer interaction (HCI). One of key problems among the vision based pointing gesture is how to recognize the pointing. Aiming at some limits existing in the literature, a novel method is developed to estimate pointing gestures based on some non-calibrated cameras. Multiple un-calibrated cameras are adopted to determine the pointing target based on pointing features extracted from multiple cameras and support vector machine (SVM) classifier. No explicit constraints are set on the cameras placement. Pointing user can move freely inside a wider interaction environment while pointing at some targets. The mentioned approach does not constrain the pointing surface whether is flat or not, or the target is visible by the cameras. Edge detection based on multi-scale wavelet transformation is used to extract pointing objects from a clutter background. Experiments have shown that the developed approach is efficient for pointing recognition by comparisons. © 2010 IEEE.

关键词： Support vector machines

来源：评论

学校读者我要写书评

暂无评论

An improved 3D holoscopic image coding scheme using HEVC based on Gaussian mixture models 13th

An improved 3D holoscopic image coding scheme using HEVC bas...

引用

13th International Forum of Digital TV and Wireless Multimedia Communication, IFTC 2016

作者： Liu, Deyang An, Ping Du, Tengyue Ma, Ran Shen, Liquan School of Communication and Information Engineering Shanghai University Shanghai200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai200072 China

ISBN: (纸本)9789811042102

3D holoscopic system can provide continuous motion parallax throughout the viewing zone with precise convergence and depth perception, for which it is regarded as a promising technique for future 3D TV. In this paper, a 3D holoscopic image coding scheme based on Gaussian mixture models (GMM) is introduced firstly, taking full advantage of the intrinsic characteristic of such particular type of content. Due to the shortcomings of GMM based method, an improved method is thereafter put forward, in which many parameters that are insignificant in the final estimator of GMM based method are avoided, and more surrounding pixels are used to obtain the model parameters with the help of the least square method. Experimental results indicate that the improved method can obtain considerable gains over HEVC intra prediction and several other prediction methods. © Springer Nature Singapore Pte Ltd. 2017.

关键词： Image coding

来源：评论

学校读者我要写书评

暂无评论

Multi-view video coding based on sequence correlation

Multi-view video coding based on sequence correlation

引用

2010 International Conference on Audio, Language and Image Processing, ICALIP 2010

作者： Lu, Feng An, Ping Zhang, Zhaoyang Shen, Liquan School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9781424458653

Traditional coding method used the same prediction structure to encode the multi-view sequences whose correlation are distinctly different. This method eliminated the temporal and spatial redundancy by using multi-references blindly. Although the traditional prediction structures have quite good coding efficiency, it results in the problem of high complexity. So by analyzing the characteristic of the multiview video data itself, we designed a correlation testing structure and depending on the correlation intensity on both the temporal and spatial direction, a method of multiple prediction structures coding jointly is proposed. Experimental results show that the proposed method can reduce the coding complexity while maintaining high coding efficiency, and to the sequences whose spatial correlation is quite strong, the method given can not only raise the PSNR, but reduce the bitrate as well. ©2010 IEEE.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Electro-optical performance of OLED with MEH-PPV fabricated by solution process 26

Electro-optical performance of OLED with MEH-PPV fabricated ...

引用

26th International display Workshops, IDW 2019

作者： Lee, Seok Je Yao, Fangnan Lee, Seung Il Jin, Cao Kim, Woo Young Moon, C.-B. Jhun, Chul Gyu Department of Electronic Display Engineering Hoseo University Asan31499 Korea Republic of Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai200072 China

ISBN: (纸本)9781713806301

We investigated the effects of solvents and concentration on the electro-optical performance of the organic light emitting diode (OLED) fabricated by the solution process. From the experimental results, we optimized the fabrication method of it and we figure out the underlying mechanism of carrier flow by the trap state. © 2019 ITE and SID.

关键词： Fabrication

来源：评论

学校读者我要写书评

暂无评论

Effective camera calibration in free-viewpoint systems

Effective camera calibration in free-viewpoint systems

引用

IET International Communication Conference on Wireless Mobile and Computing, CCWMC 2011

作者： Liu, Liliang An, Ping Zheng, Zhuan Zhang, Zhaoyang School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai 200072 China

ISBN: (纸本)9781849195058

Multi-camera calibration parameters are needed in free-viewpoint video system to obtain virtual viewpoint. Most existing calibration technologies are for single camera and further research is needed for multi-camera calibration. A multi-camera calibration method based on 2D plane calibration algorithm combined with stereo vision calibration is proposed in this paper. Camera intrinsic parameters can be obtained using 2D plane calibration algorithm. Through transforming the world coordinate system, the unique extrinsic parameters are got. The validity of the proposed method is verified by experiments.

关键词： Calibration

来源：评论

学校读者我要写书评

暂无评论

Efficient energy transfer of red organic light emitting devices using two species of donors in emissive layer

Efficient energy transfer of red organic light emitting devi...

引用

16th International display Workshops, IDW '09

作者： Lu, Lin Zhang, Jianhua Wei, Bin Zhang, Hao Xu, Hongguang Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University 149 Yanchang Rd Shanghai 200072 China SVA Electron Co. Ltd. FPD Building 149 Yanchang Rd Shanghai 200072 China

We investigated the characteristics of red OLEDs with two donors and one dopant. The EL efficiency of novel device increased two folds compared to devices with single host materials while the peak emission kept unchan... 详细信息

关键词： Light emission

来源：评论

学校读者我要写书评

暂无评论

Improved H.264 GOP-level bit allocation by incremental PID algorithm

Improved H.264 GOP-level bit allocation by incremental PID a...

引用

IET Conference on Wireless, Mobile and Sensor Networks 2007, CCWMSN'07

作者： Shen, Liquan Zhang, Zhaoyang Li, Ying Liu, Zhi Key Lab. of Advanced Display and System Application Ministry of Education Shanghai Univ. Shanghai 200072 China School of Computer Engineering and Science Shanghai University Shanghai 200072 China

ISBN: (纸本)9780863418365

Since the current rate control schemes in H.264 do not present the capability of efficient GOP-level bit allocation, the video quality varies greatly for sequences with the scene change or the scene complexity varying from one GOP to another. To overcome the limitation, we propose a novel rate control scheme based on incremental PID algorithm. The incremental PID algorithm is introduced to minimize video quality variations in GOP-level bit allocation. Extensive simulation results show that the proposed rate control scheme, without expensive computational complexity added, decreases the average video quality variations by 15.07%.

关键词： Quality control

来源：评论

学校读者我要写书评

暂无评论

IntML-KNN: A Few-Shot Radio Frequency Fingerprint Identification Scheme for Lora Devices

引用

IEEE Signal Processing Letters 2025年

作者： Cao, Xin Tan, Weijie Gao, Qiangqiang Hu, Zhilong Li, Chunguo Guizhou University College of Computer Science and Technology Guiyang 550025 China Guizhou University State Key Laboratory of Public Big Data College of Computer Science and Technology Guiyang 550025 China Advanced Cryptography and System Security Key Laboratory of Sichuan Province Chengdu 610025 China Ministry of Industry and Information Technology Laboratory of Cryptograph Application Technology Innovation and Testing Verification Beijing 100015 China Southeast University School of Information Science and Engineering Nanjing 210096 China

Deep learning (DL) is widely used in radio frequency fingerprint identification (RFFI). However, in few-shot case, traditional DL-based RFFI need to construct auxiliary dataset to realize radio frequency fingerprint identification. To address this issue, we propose a few-shot RFFI (FS-RFFI) method based on interpolating metric learning and KNN (IntML-KNN). Specifically, the method first extends the dataset with data augmentation, and CutMix interpolation. Secondly, combining with metric learning to enhance the generalization capacity of the model. Finally, KNN algorithm is designed to realize device classification and detection. The proposed IntML-KNN method is verified on the commercial available LoRa dataset. The experimental results indicate that the proposed scheme exhibits strong classification and generalization performance in FS-RFFI. Meanwhile, the recognition rate of the proposed IntML-KNN reaches 97.00% with only 10% samples. © 1994-2012 IEEE.

关键词： Data augmentation deep learning few-shot LoRa metric learning radio frequency fingerprint

来源：评论

学校读者我要写书评

暂无评论

Microstructures of ZnO electrospun nanofibers on AzO glass

Microstructures of ZnO electrospun nanofibers on AzO glass

引用

2014 International Conference on Materials Science and Engineering Technology, MSET 2014

作者： Lu, Xiu Zhen Chang, Yan Yan Xu, Ming Tao Peng, Bo Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9783038351023

ZnO electrospun nanofibers were considered to be potential novel materials in applications of photovoltaic devices and sensors. AZO glass was usually used in those devices as transparent electrodes. ZnO nanofibers on AZO glass were synthesized by electrospinning and calcination process. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and photoluminescence (PL) spectrum was employed to investigate the morphology, structure and optical performance of ZnO nanofibers. Network structure composed of sheet ZnO was observed. Raman spectra and PL spectrum indicated the existence of defect states in the ZnO nanofibers. © (2014) Trans Tech Publications, Switzerland.

关键词： Glass

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：