中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共5条,第1-5条 帮助

条数/页: 排序方式:
IterDepth: Iterative Residual Refinement for Outdoor Self-Supervised Multi-Frame Monocular Depth Estimation 期刊论文  OAI收割
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, 2024, 卷号: 34, 期号: 1, 页码: 329-341
作者:  
Feng, Cheng;  Chen, Zhen;  Zhang, Congxuan;  Hu, Weiming;  Li, Bing
  |  收藏  |  浏览/下载:28/0  |  提交时间:2024/03/26
Irregular 8psk mapping for variable length codes with small blocks in a bicm-id system 期刊论文  iSwitch采集
Eurasip journal on wireless communications and networking, 2015, 卷号: 2015, 期号: 1
作者:  
Dai,Jing;  Zhang,Can;  Gao,Shaoshuai;  Hou,Lei
收藏  |  浏览/下载:31/0  |  提交时间:2019/05/09
Optimization of irregular mapping for error floor removed bit-interleaved coded modulation with iterative decoding and 8psk 期刊论文  iSwitch采集
Eurasip journal on wireless communications and networking, 2014, 卷号: 2014, 期号: 1
作者:  
Cheng,Chen;  Tu,Guofang;  Zhang,Can;  Dai,Jing
收藏  |  浏览/下载:32/0  |  提交时间:2019/05/09
Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者:  
Zhang J.;  Zhang J.;  Zhang J.;  Shi G.;  Zhang X.
收藏  |  浏览/下载:25/0  |  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.  
Studies and advances on joint source-channel encoding/decoding techniques in flow media communications 期刊论文  iSwitch采集
Science china-information sciences, 2010, 卷号: 53, 期号: 1, 页码: 1-17
作者:  
Tu GuoFang;  Liu JianJun;  Zhang Can;  Gao ShaoShuai;  Li ShiDong
收藏  |  浏览/下载:44/0  |  提交时间:2019/05/10