FISH-EYE

作品数：8被引量：20H指数：2
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相关领域：一般工业技术更多>>
相关作者：张诚更多>>
相关机构：苏州大学山东大学西南交通大学更多>>
相关期刊：《Journal of Iron and Steel Research International》《Chinese Physics B》《Chinese Optics Letters》《数码世界》更多>>
相关基金：国家重点基础研究发展计划国家自然科学基金国家教育部博士点基金更多>>
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Smooth-optimal Adaptive Trajectory Tracking Using an Uncalibrated Fish-eye Camera被引量：1
《International Journal of Automation and computing》2020年第2期267-278,共12页Zhao-Bing Kang Wei Zou Zheng Zhu Hong-Xuan Ma 
supported by National Key Research and Development Program(No.2018YFB1306303);National Natural Science Foundation of China(No.61773374).
This paper presents a two-stage smooth-optimal trajectory tracking strategy.Different from existing methods,the optimal trajectory tracked point can be directly determined in an uncalibrated fish-eye image.In the firs...
关键词：SMOOTH motion ADAPTIVE control TRAJECTORY tracking WHEELED mobile robots visual servoing 
Using UAVs for detection of trees from digital surface models
《Journal of Forestry Research》2018年第3期804-812,共9页Nusret Demir 
financially supported by the scientific research projects coordination unit of Akdeniz University,Project No.FBA-2015-446
A difficult problem in forestry is tree inventory.In this study, a GoProHero attached to a small unmanned aerial vehicle was used to capture images of a small area covered by pinus pinea trees. Then, a digital surface...
关键词：Tree detection Digital surface model Fish-eye camera PHOTOGRAMMETRY UAV 
An acoustic Maxwell's fish-eye lens based on gradient-index metamaterials被引量：2
《Chinese Physics B》2016年第10期178-181,共4页袁保国 田野 程营 刘晓峻 
supported by the National Basic Research Program of China(Grant No.2012CB921504);the National Natural Science Foundation of China(Grant Nos.11574148,11474162,1274171,11674172,and 11674175);the Specialized Research Fund for the Doctoral Program of Higher Education,China(Grant Nos.20110091120040 and 20120091110001)
We have proposed a two-dimensional acoustic Maxwell’s fish-eye lens by using the gradient-index metamaterials with space-coiling units. By adjusting the structural parameters of the units, the refractive index can be...
关键词：gradient index Maxwell's fish-eye acoustic lens BROADBAND 
Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight被引量：14
《Journal of Iron and Steel Research International》2014年第6期614-618,共5页Ji-ming ZHANG Ling-kang JI Dong-jie BAO Yao-rong FENG Shou-xin LI Yu-qing WENG 
Sponsored by National Basic Research Program(973 Program)of China(2004CB619100)
Gigacycle fatigue behavior of 60Si2CrVA high strength spring steel was investigated by ultrasonic fatigue test machine. Fatigue fractography was observed by scanning electron microscopy （SEM）. Maximum inclusion size...
关键词：gigacycle fatigue S-N curve FRACTOGRAPHY FISH-EYE INCLUSION statistics of extreme value （SEV） generalized Pareto distribution （GPD） 
Effect of inclusion on high cycle fatigue response of a powder metallurgy tool steel被引量：1
《Journal of Central South University》2012年第7期1773-1779,共7页姚君 曲选辉 Rafi-ud-din 何新波 章林 
Project(2007BAE51B05)supported by the National Key Technologies Research and Development Program of China
The high cycle fatigue response of a high V-alloyed powder metallurgy tool steel （AISI 11） with different inclusion sizes was studied. Two materials of this grade at a similar hardness of about HRC 60 were subjected...
关键词：powder metallurgy tool steel high cycle fatigue FRACTOGRAPHY FISH-EYE INCLUSION 
Quadric surface projection model for fish-eye cameras
《Chinese Optics Letters》2012年第1期28-31,共4页孟甜甜 蒋金涛 杨鸣 
The curved surface projection model in fisheye image correction algorithm is presented. To analyze the causes of distortion in existing models, we establish an ideal surface projection model and compare its surface wi...
关键词：Image reconstruction Least squares approximations 
High-cycle Fatigue Fracture Behavior of Ultrahigh Strength Steels被引量：2
《Journal of Materials Science & Technology》2008年第5期787-792,共6页Weijun HUI Yihong NIE Han DONG Yuqing WENG Chunxu WANG 
the National Key Basic Research and Development Program of China under grant No.2004CB619104.
The fatigue fracture behavior of four ultrahigh strength steels with different melting processes and therefore different inclusion sizes were studied by using a rotating bar two-point bending fatigue machine in the hi...
关键词：High-cycle fatigue Ultrahigh strength steel INCLUSION S-N curve Fish-eye fracture 
SAMSUNG D-XENOGON 10-17mm F3.5-4.5 ED FISH-EYE 独一无二的影像魅力
《数码世界》2007年第8期82-83,共2页杨明 梁栋 李晟 
不止一次在网络上的摄影交流论坛中看到这样半开玩笑般的问题:为什么镜头是圆的,但拍出的照片却是方的?一种回答颇显正式,会有网友从相机构造解释到成像原理。也有网友以图代答——谁说照片都是方形?你瞧,鱼眼镜头拍出的照片,就是圆圆...
关键词：超广角镜头 交流论坛 构造解释 变焦 内对焦 等效焦距 拍摄环境 成像品质 手动对焦 锐度 
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