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浏览/检索结果: 共4条，第1-4条 帮助 限定条件 内容类型：会议论文    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 Ion Beam Figuring fabricate effect with different removal sizes 会议论文 Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012, August 26, 2012 - August 28, 2012, Changchun, China Gu Y. Q. 收藏  |  浏览/下载：21/0  |  提交时间：2014/05/15 Image Motion Compensation for a certain Aviation Camera Based on Lucy-Richardson Algorithm 会议论文 付金宝; 丁亚林 收藏  |  浏览/下载：6/0  |  提交时间：2012/05/12 Image motion compensation for a certain aviation camera based on Lucy-Richardson algorithm (EI CONFERENCE) 会议论文 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China Zhong C.; Fu J.; Ding Y. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 According to the actual situation  when high quality and high precision are required for the image  both beforehand and afterwards compensation should be used. In this paper  we use Lucy-Richardson algorithm to compensate image motion of a certain aviation camera as an afterwards compensation. Firstly  we analyze the imaging principle of the camera and the reasons that cause image motion. Then we have a brief introduce of the Lucy-Richardson algorithm. At last  in order to show the feasibility of the method  we do some simulation. Through theoretical and practical analysis  experiments and test  we conclude the Lucy-Richardson algorithm can be used to compensate image motion for the certain camera. 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.