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浏览/检索结果: 共3条，第1-3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 An adaptive temporal filter based on motion compensation for video noise reduction (EI CONFERENCE) 会议论文 2006 International Conference on Communication Technology, ICCT '06, November 27, 2006 - November 30, 2006, Guilin, China Li Y.; Qiao Y. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 Noise in video signals will degrades the image quality. In this paper  an adaptive temporal filter based on motion compensation is proposed for noise reduction. The noise in video sequence is tracked by motion compensation in temporal domain. The filtering strength can be adaptive changed on object motion situation. The experiment results show that the proposed filter is better than the filter in spatial domain. The noise in video signals can be effectively reduced and the image will not be blurry as the result of spatial filter.   Novel adaptive temporal filter based on motion compensation for video noise reduction (EI CONFERENCE) 会议论文 2006 International Symposium on Communications and Information Technologies, ISCIT, October 18, 2006 - October 20, 2006, Bangkok, Thailand Yan L.; Yanfeng Q. 收藏  |  浏览/下载：10/0  |  提交时间：2013/03/25 Noise in video signals will degrades the image quality. In this paper  a novel adaptive temporal filter based on motion compensation is proposed for noise reduction. The noise in video sequence is tracked by motion compensation in temporal domain. The filtering strength can be adaptive changed on object motion situation. The experiment results show that the proposed filter is better than the filter in spatial domain. The noise in video signals can be effectively reduced and the image will not be blurry as the result of spatial filter. 2006 IEEE.   A new method of image reconstruction with high resolution in X-ray coded aperture imaging (EI CONFERENCE) 会议论文 Laser-Generated, Synchrotron, and Other Laboratory X-Ray and EUV Sources, Optics, and Applications II, August 2, 2005 - August 4, 2005, San Diego, CA, United states Hu J.; Cheng L.; Wu X.; Sun Y.; Bai Y. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 In the processing diagnosis of the inertia confinement fusion (ICF)  the ring coded aperture imaging technique is applied in order to gain high space and time resolutions simultaneously. The key of acquiring high spatial resolution is how to obtain a point spread function of an imaging system. The common method is the firsthand projection method which is an approximate one. The x-ray diffraction effect is neglected in the method  so the resolution of reconstructed image is decreased. We have derived the point spread function (PSF) of the ring coded aperture from scalar diffraction theory. And the Wiener filter is fabricated on the basis of the PSF. In National Key Laboratory of Laser Fusion  at China Academy of Engineering Physics  the imaging experiment on the diagnosis of ICF is completed using the ring coded aperture plate with inner diameter d1 = 250m and outer diameter d2 = 260m . The obtained coded image is processed by the Wiener filter which diffractive effect is considered. The processed results have shown that resolution and modulation contrast of acquired image are evidently better than the results obtained by the firsthand projection method.