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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     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序提交时间升序提交时间降序题名升序题名降序作者升序作者降序 A Brief Guide: Code for Spontaneous Expressions and Micro-Expressions in Videos 会议论文 FME 2021 - Proceedings of the 1st Workshop on Facial Micro-Expression: Advanced Techniques for Facial Expressions Generation and Spotting, 不详, October 24, 2021 作者:  Dong, Zizhao;  Wang, Gang;  Lu, Shaoyuan;  Yan, Wen-Jing;  Wang, Su-Jing 收藏  |  浏览/下载：16/0  |  提交时间：2021/11/29 Multiple Performance Analysis for Nonlinear Networked Control Systems with Limited Channels 会议论文 Anchorage, 12-15 June 2018 作者:  Tianwei Zhou;   Zhiqiang Zuo;   Yijing Wang;   Long Cheng 收藏  |  浏览/下载：13/0  |  提交时间：2019/02/14 Position Measurement of the Direct Drive Motor of Large Aperture Telescope 会议论文 San Diego, California, USA, 2010-6-27 Li Ying; Wang Daxing 收藏  |  浏览/下载：12/0  |  提交时间：2014/01/05 astronomy  large aperture telescope  direct drive  position measurement  SVPWM   Wavelet-fractal based compression of ophthalmic image (EI CONFERENCE) 会议论文 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China Xiu-Ying Z.; Lin-Pei Z. 收藏  |  浏览/下载：14/0  |  提交时间：2013/03/25 This study is designed to determine the degree and methods of digital image compression to produce ophthalmic images of sufficient quality for transmission and diagnosis. Fractal based compression techniques  which provide a large compression ratio for grayscale images have been reported in the literature. Fractal coding is based on the fractal theory of iterated transformations. But  it's searching and mapping algorithm cannot address the need of real-time. To improve the real-time performance of the algorithm  we use wavelet transforms to decompose images. The wavelet transform is a natural tool for analyzing fractal block coders since wavelet bases possess the same type of dyadic self-similarity that fractal coders seek to exploit. We propose a method of fractal coding the weighted wavelet subtree. Experimented results show that the improved hybrid image can improve the PSNR of the rebuild image at the same compression ratio.