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浏览/检索结果: 共5条，第1-5条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Compressive sensing reconstruction of hyperspectral images based on codec space-spectrum joint dense residual network 期刊论文 Iet Image Processing, 2022, 页码: 16 作者:  S. M. Xiao;  Y. Zhang;  X. L. Chang and J. J. Xu 收藏  |  浏览/下载：0/0  |  提交时间：2023/06/14 基于双积分球结构的透光率和雾度测量装置的研制 学位论文 硕士: 中国科学院大学, 2014 吴富 收藏  |  浏览/下载：117/0  |  提交时间：2015/05/03 透光率  雾度  双积分球  LED  锁相放大   基于CCSDS的遥感图像感兴趣区域压缩研究 学位论文 博士: 中国科学院大学, 2014 许志涛 收藏  |  浏览/下载：36/0  |  提交时间：2014/08/21 DVI interface, optical fiber video transceiver used in LED display system (EI CONFERENCE) 会议论文 2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China Li S.; Wang R. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 A professional DVI-Video optical fiber transceiver was designed based on FPGA (Field Programmable Gate Array) in order to meet the need of real-time LED display. The system could be used to transmit a non-loss  real-time video source whose resolution was 1024 768 and refresh rate was 60Hz in a single mode optical fiber. The top-down design method was used while programming FPGA. Some module design ideas were discussed including video data acquisition  caching  framing  frame detecting and video reproducing. The required bandwidth of each module was analyzed and calculated in details. Some relevant simulation results were also given. In practical test  real-time video display was achieved. And the transmission rate of coded data was up to 2Gbps  and the transmission distance could reach 10km. 2011 IEEE.   Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China Zhang X.; Zhang X.; Shi G.; Zhang J.; He F. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus  which means the system MTF is quite insensitive to defocus  and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However  it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration  especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification  a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm  effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed  in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried  and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.