中国科学院机构知识库网格系统: 检索

Encoding and decoding communications based on perfect vector optical vortex arrays 期刊论文 OAI收割
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2022, 卷号: 55, 期号: 43
作者: Long, Zixu; Hu, Huajie; Ma, Xin; Tai, Yuping; Li, Xinzhong

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收藏 | 浏览/下载：59/0 | 提交时间：2022/10/10

optical vortex array vector optical field optical encoding and decoding communication

Research on 3D Reconstruction methods Based on Binocular Structured Light Vision 期刊论文 OAI收割
Journal of Physics: Conference Series, 2021, 卷号: 1744, 期号: 3
作者: Han,Ruilu; Yan,Hongjuan; Ma,Liping

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收藏 | 浏览/下载：62/0 | 提交时间：2021/03/22

Binocular vision structured light encoding and decoding 3D reconstruction point cloud fusion

Compressed Coding, AMP-Based Decoding, and Analog Spatial Coupling 期刊论文 OAI收割
IEEE TRANSACTIONS ON COMMUNICATIONS, 2020, 卷号: 68, 期号: 12, 页码: 7362-7375
作者: Liang, Shansuo; Liang, Chulong; Ma, Junjie; Ping, Li

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收藏 | 浏览/下载：149/0 | 提交时间：2021/04/26

Decoding Error correction Encoding Error correction codes Signal to noise ratio Modulation Compressed sensing Compressed sensing forward error control coding approximate message passing state evolution area theorem and analog spatial-coupling

Brain Encoding and Decoding in fMRI with Bidirectional Deep Generative Models 期刊论文 OAI收割
Engineering, 2019, 期号: 0, 页码: 1-8
作者: Du Changde; Li Jinpeng; Huang Lijie; He Huiguang

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收藏 | 浏览/下载：117/0 | 提交时间：2019/05/06

Brain Encoding And Decoding Fmri Deep Neural Networks Deep Generative Models Dual Learning

Optimum design of laser encoding and decoding on laser beam-riding guidance (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011, December 11, 2011 - December 13, 2011, Taichung, Taiwan
作者: Yang L.; Yang L.

收藏 | 浏览/下载：49/0 | 提交时间：2013/03/25

Operating principle of laser beam-riding guidance was set forth. Based on the principle of spatial frequency-encoding experimental results demonstrated that the receiver can receive correctly the encoded signal and can decode the signal an optimum laser encoding mode was designed measurement for the missdistance is feasible and all the performance parameters satisfy the demand. (2012) Trans Tech Publications which can transfer continuous laser into pulse laser that represents different position information. Then the mathematic model of deviation from target is built Switzerland. a modified encoding pattern was presented which is composed of two light paths crossed 90. Azimuth information of target is given in orthogonal coordinate system and deviation from target is linearity. As well as characteristic distribution of spatial laser field is analyzed. Corresponding decoding mode was presented by testing in 2 kilometers outdoor

Top-down gaze movement control in target search using population cell coding of visual context 期刊论文 iSwitch采集
Ieee transactions on autonomous mental development, 2010, 卷号: 2, 期号: 3, 页码: 196-215
作者: Miao, Jun; Qing, Laiyun; Zou, Baixian; Duan, Lijuan; Gao, Wen

收藏 | 浏览/下载：64/0 | 提交时间：2019/05/10

Gaze movement control Neural encoding and decoding Population cell coding Target search Visual context

Top-Down Gaze Movement Control in Target Search Using Population Cell Coding of Visual Context 期刊论文 OAI收割
IEEE TRANSACTIONS ON AUTONOMOUS MENTAL DEVELOPMENT, 2010, 卷号: 2, 期号: 3, 页码: 196-215
作者: Miao, Jun; Qing, Laiyun; Zou, Baixian; Duan, Lijuan; Gao, Wen

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收藏 | 浏览/下载：49/0 | 提交时间：2019/12/16

Gaze movement control neural encoding and decoding population cell coding target search visual context

Transceiving protocol designc for a free space optical communication system (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, November 16, 2008 - November 19, 2008, Beijing, China
Hualong W.; Wanxin S.; Zhongbao X.

收藏 | 浏览/下载：81/0 | 提交时间：2013/03/25

A new transceiving protocol is demonstrated for a Free Space Optical (FSO) communication system and it's discussed in two parts: the transmitting protocol and the receiving protocol. During the discussion of these two parts the cooperation of them is also discussed. Different from wired communication an FSO system modulates the data on a narrow beam of laser transmitting through the free space or the atmosphere and the protocol presented in this paper is mainly optimized for terrestrial Free Space Optical links in which the signal channel of the system is mainly the atmosphere. Due to the complex composition and activity of the atmosphere this signal channel brings in great influence on the transmitting laser in it for example the absorption and scattering of the atmosphere molecules and aerosols the scintillation of received laser power caused by the turbulence of the atmosphere all of which results in a much higher Bit Error Rate (BER) of the communication system. Thus in designing a protocol for an FSO system more effort should be taken in the encoding of the data stream the synchronization of the data stream error checking and exception handling. The main function of the transmitting protocol includes interfacing the outer input data with a parallel port buffering the input data encoding the input data stream serializing the parallel data and output the serialized data. It also has an output management unit to manage the activity of each part of the transmitting protocol. The main function of the receiving protocol includes filtering and synchronizing the input serial data stream paralleling the serial data stream decoding the input data error checking exception handling and interfacing the outer receiver with a parallel port. The entire transceiving protocol could be programmed into a single FPGA chip to improve system integrity and reduce the system cost. The presented protocol could be taken as "protocol transparent" for outer interfaces meaning that when interfacing the presented system to an outer system you don't have to consider what protocol the outer system transceiving data stream is under for example the TCP/IP protocol or anything else in the case that its I/O interface is a parallel port. Simulation and final experiment prove that the protocol presented is working fine at a certain bit rate scale. 2009 SPIE.

Compression of remote sensing image based on Listless Zerotree Coding and DPCM (EI CONFERENCE) 会议论文 OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Chen S.-L.; Huang L.-Q.

收藏 | 浏览/下载：52/0 | 提交时间：2013/03/25

The data quantity of remote sensing image is very large. Furthermore the lowest frequency subband contains the main energy of original image and reflects the coarse of original image after remote sensing image is transformed by wavelet so it is very important to the reconstructed image. Therefore a hybrid image compression method based on Listless Zerotree Coding (LZC) and DPCM is presented namely the lowest frequency subband is compressed by DPCM and others are compressed by LZC. LZC is a kind of zerotree coding algorithm for hardware implementation which is based on SPIHT and substitutes two significant bit maps for three lists in SPIHT algorithm. Thereby LZC significantly reduces the memory requirement and complexity during encoding and decoding procedure. But LZC doesn't recognize the significance of grandchild sets so the PSNR values of LZC are lower than SPIHT's and the compression speed drops. It is improved by adding a significant bit map that recognizes the significance of grandchild sets. A comparison reveals that the PSNR results of the hybrid compression method are 2 dB higher than those of LZC and the compression speed is also improved.

Lossless wavelet compression on medical image (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Photonics and Imaging in Biology and Medicine, September 3, 2005 - September 6, 2005, Tianjin, China
作者: Liu H.; Liu H.; Liu H.

收藏 | 浏览/下载：66/0 | 提交时间：2013/03/25

An increasing number of medical imagery is created directly in digital form. Such as Clinical image Archiving and Communication Systems (PACS). as well as telemedicine networks require the storage and transmission of this huge amount of medical image data. Efficient compression of these data is crucial. Several lossless and lossy techniques for the compression of the data have been proposed. Lossless techniques allow exact reconstruction of the original imagery while lossy techniques aim to achieve high compression ratios by allowing some acceptable degradation in the image. Lossless compression does not degrade the image thus facilitating accurate diagnosis of course at the expense of higher bit rates i.e. lower compression ratios. Various methods both for lossy (irreversible) and lossless (reversible) image compression are proposed in the literature. The recent advances in the lossy compression techniques include different methods such as vector quantization wavelet coding neural networks and fractal coding. Although these methods can achieve high compression ratios (of the order 50:1 or even more) they do not allow reconstructing exactly the original version of the input data. Lossless compression techniques permit the perfect reconstruction of the original image but the achievable compression ratios are only of the order 2:1 up to 4:1. In our paper we use a kind of lifting scheme to generate truly loss-less non-linear integer-to-integer wavelet transforms. At the same time we exploit the coding algorithm producing an embedded code has the property that the bits in the bit stream are generated in order of importance so that all the low rate codes are included at the beginning of the bit stream. Typically the encoding process stops when the target bit rate is met. Similarly the decoder can interrupt the decoding process at any point in the bil stream and still reconstruct the image. Therefore a compression scheme generating an embedded code can start sending over the network the coarser version of the image first and continues with the progressive transmission of the refinement details. Experimental results show that our method can get a perfect performance in compression ratio and reconstructive image.