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赵侃 《数码设计:surface》2009,(2):60-62
德国城市形象设计历时长久,发端于20世纪20年代末。至20世纪90年代已形成高峰。德国对于城市形象设计的经验和案例颇多,对于中国正在兴起的城市形象识别具有很强的借鉴作用。鉴于文章的篇幅有限,本文的目的在于扼要的介绍德国城市设计的典型案例与理论模型的分析,以此为借鉴比较分析现有的中国城市形象设计。 相似文献
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The plenoptic camera can refocus after imaging, and obtain the position and direction information of the target at the same time with one exposure. Compared with the active distance measurement method and the traditional passive distance measurement method, the depth measurement method based on the plenoptic camera has the advantages of being difficult to detect and easy to calibrate. The plenoptic camera 3D imaging technology is a computational imaging technology that integrates the front-end optical system and the back-end information processing. The current research works mainly focus on the back-end information processing algorithm et al. There are few reports on the research of the front-end optical system. Therefore, the design of the front-end optical system was researched. Firstly, a calculation model was established for the depth resolution of a plenoptic camera based on multi-eye vision and the influence of optical system performance parameters was analyzed such as focal length and F-number on the object depth resolution. Secondly, the influence of factors was analyzed such as the blocking ratio of the two-mirror optical system and the magnification of the secondary mirror on the system parameters. Finally, a plenoptic camera main objective optical system for sub-kilometer-scale 3D imaging was designed comprehensively considering the design, processing, assembly, and ranging performance. The focal length of the system is 500 mm, the total length of the system is less than 163 mm, the telephoto ratio is less than 1/3, and the working temperature range is ?40 -70 ℃. The full field of view MTF in 80 lp/mm is better than 0.3 at different temperatures. If the plenoptic camera uses this objective and a sub-pixel recognition accuracy algorithm of 1/8 pixel, a depth resolution of less than 5 m can be obtained at 0.5 km. 相似文献
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赵侃 《数码设计:surface》2010,(9):55-57
国内目前的网页设计,大多以视觉效果作为网页界面设计的首要考量,因而容易忽视网页设计的可用性。而网页界面设计,不仅应当给使用者带来视觉上的愉悦,更应当很好地帮助用户浏览网页内容,引导用户操作以完成网页服务。转变设计师以视觉效果为首要考量的固有设计习惯,将用户体验作为设计的重点,才是设计出具有良好互动性的网页的开端。 相似文献
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提出了基于相对深度计算的TIP(Tour Into the Picture)技术.该技术根据图像的几何透视关系计算出场景的背景与前景的深度信息,实现从参考图像到TIP模型的连贯切换.通过对蜘蛛网格的修改,TIP技术实现了斜坡场景的漫游;同时将该技术运用于多个场景实现了多个场景的串联漫游. 相似文献
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赵侃 《军民两用技术与产品》2016,(22)
视频监控,又称工业电视,伴随着企业的发展和自动化水平的提高,应用越来越普遍.结合作者在煤炭企业多年的工作实践,重点分析了在大型煤炭企业中视频监控系统的视频干扰原因,提出了有效解决视频干扰的办法.以期与同行们共同提高视频监控系统的管理与维护水平. 相似文献
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三星座时差定位是一个非线性估计问题,当辐射源高程所带来的误差无法忽略时,仍然使用基于WGS-84地球模型的时差定位算法对目标进行跟踪定位的方法具有一定的局限性.当数据残缺时,传统的定位算法无法精确估计高程目标位置.为了提高传统的基于三星的时差定位系统的跟踪性能,提出了基于UKF滤波的TDOA/FDOA联合定位算法对单个目标的位置和速度进行估计.仿真结果证明了TDOA/FDOA联合定位算法拥有更好的跟踪性能,以及该算法的稳定性和有效性 相似文献
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提出一种适合桥头夯实的设备-RHIC,并建立动力学模型.对高速液压夯实机(RHIC)的夯实效果进行试验研究,得到夯击次数与每层沉降量及压实度的关系曲线.从曲线可知,随着夯击次数的提高,每层的沉降量也迅速增加,在夯击15次时总沉降量最大;夯击12次时整体压实度较高,表层压实度达95%,平均压实度可达93%,基本满足1.5 m回填夯实时的施工要求,说明高速液压夯实机(RHIC)适用于桥台夯实,夯实效果好,影响深度深. 相似文献