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IEEE International Symposium on Mixed and Augmented Reality Workshops (ISMARW)

作者： Juting Dai Xinyi Tang Leif Oppermann Key Laboratory of Infrared System Detection and Imaging Technology Fraunhofer Institute for Applied Information Technology FIT University of Chinese Academy of Sciences Shanghai Institute of Technical Physics of The Chinese Academy of Sciences

ISBN: (纸本)9781538614549

We present a new SLAM system capable of producing high quality globally consistent surface reconstructions with accurate real-time tracking and localization abilities. The system works on an off the shelf laptop with a typical GPU. This paper proposes an approach to unify feature-based keyframe techniques with fused volumetric surface reconstruction methods to overcome both of their limitations. On one hand, feature-based keyframe SLAM techniques have reached a level of maturity and can guarantee accurate and real-time tracking and localization ability, but their raw RGB-D point clouds are too noisy. On the other hand, volumetric surface reconstruction methods can produce a dense surface reconstruction of the environment, which will be helpful for Augmented Reality (AR) applications and scene understanding. However, current dense SLAM systems have limited tracking ability, which is vital for the quality of surface reconstruction. Moreover most of the current dense SLAM systems have to run on a powerful desktop PC to guarantee realtime performance. By unifying the feature-based keyframe tracking ability and adopting a multi-threaded design, our system improves both the tracking ability and the real-time performance. We present results of a wide variety of aspects of our system and evaluate it using the widely used TUM RGB-D and ICL-NUIM Datasets. Our system achieves unprecedented performance in terms of trajectory estimation, surface reconstruction, real-time and computational performance in comparison to other start-of-the-art dense RGB-D SLAM systems.

关键词： Augmented reality

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Design and implementation of high reliable spaceborne reconfiguration system

Design and implementation of high reliable spaceborne reconf...

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International Conference on Electronics Information and Emergency Communication

作者： Changpei Han Lei Zhang Yaopu Zou Minzhu Yang Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China University of Chinese Academy of Sciences Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China

ISBN: (纸本)9781509019984

As the improvement of the SRAM-based FPGA's production technology, the number of gates has reached 10 million-scale, it becomes more powerful, increasingly used in the space field. Due to the impact of space radiation, SRAM FPGA couldn't always be stable for space applications, it needs to strengthen reliability. High reliable spaceborne reconfiguration system is designed to ensure correct operation of the SRAM FPGA onboard. The system can achieve three functions: first, reconfiguring SRAM FPGA using external PROM or E 2 PROM memory; second, accepting the ground configuration file and coding it in Hamming method, then storing it in E 2 PROM; last, operating EDAC during idle time. The system can reduce the impact of SEU on SRAM FPGA, store different programs in E 2 PROM, realizing multiple functions in a single FPGA in different time. The cyclic EDAC function, not only guarantees configuration data correct in the E2PROM, but also achieves statistics of single event effect occurrence probability in external memory device, such as E2PROM.

关键词： Field programmable gate arrays Random access memory Single event upsets PROM Loading Reliability engineering

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Patch-based Object Tracking via Locality-constrained Linear Coding

Patch-based Object Tracking via Locality-constrained Linear ...

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第35届中国控制会议

作者： Kunqi Gu Mingna Liu Tao Zhou Fanghui Liu Xiangjian He Jie Yang Yu Qiao Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Shanghai Institute of Spaceflight Control Technology Infrared Detection Technology Research and Development Center China Aerospace Science and Technology Corporation School of Computing and Communications University of Technology The Key Laboratory of Ministry of Education for System Control and Information Processing

ISBN: (纸本)9781509009107

In this paper,the Locality-constrained Linear Coding(LLC) algorithm is incorporated into the object tracking ***,we extract local patches within a candidate and then utilize the LLC algorithm to encode these *** on these codes,we exploit pyramid max pooling strategy to generate a richer feature *** feature histogram which integrates holistic and part-based features can be more discriminative and ***,an occlusion handling strategy is utilized to make our tracker more ***,an efficient graph-based manifold ranking algorithm is exploited to capture the relevance between target templates and *** tracking,target templates are taken as labeled nodes while target candidates are taken as unlabeled nodes,and the goal of tracking is to search for the candidate that is the most relevant to existing labeled nodes by manifold ranking *** on challenging video sequences have demonstrated the superior accuracy and robustness of the proposed method in comparison to other state-of-the-art baselines.

关键词： object tracking LLC pyramid max-pooling local appearance model manifold ranking

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The development of infrared remote sensors for Chinese meteorological satellites

The development of infrared remote sensors for Chinese meteo...

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International Conference on infrared and Millimeter Waves

作者： Lei Ding Wei Lu Shanghai Institute of Technical Physics Key Laboratory of Infrared System Detection and Imaging Technology Shanghai China

ISBN: (纸本)9781479982738

Meteorological satellites have become an irreplaceable weather and ocean observing tool. Since the first Chinese polar-orbiting meteorological satellite Feng-Yun (FY-1A) was launched successfully in 1988, there are totally 13 meteorological satellites that were launched into both sun synchronous and geostationary orbit. China is among the few countries in the world which are simultaneously operating both orbiting meteorological satellites. All the satellites have been incorporated into the global constellations of operational meteorological satellites within the WMO framework. More satellites are under construction to be the second generation ones. The status of Chinese meteorological satellite mission is introduced in this paper.

关键词： Satellites Satellite broadcasting infrared sensors Remote sensing Radiometry Detectors imaging

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CMOS amplifier for neural signal recording applications

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key Engineering Materials 2015年 645卷 1279-1284页

作者： Zhang, Zhang Cheng, Zhengxi Zhuang, Yiwei Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China State Key Laboratory of ASIC and System Fudan University Shanghai200433 China School of Electronic Science and Applied Physics Hefei University of Technology Hefei Anhui230009 China

A low power low noise CMOS amplifier with integrated filter for neural signal recording is designed and fabricated with CSMC 0.5 μm CMOS process. DC offsets introduced by electrode-tissue interface are rejected through a feedback low-pass filter. The bandwidth of the amplifier is in 3.5Hz-5.5KHz range, and the gain is about 48dB in the midband. AC input differential mode voltage range is 10mV, and DC input differential mode voltage range is 180mV. The amplifier can accommodate 180mV DC offsets drift and 10mV neural spikes. The neural probe array is integrated directly on the surface of the amplifier array chip, and is tested in saline solution, and also is implanted in rats in vivo, the results of the experiments show that the amplifier is suitable for neural signal recording. The power dissipation is about 14μW while consuming 0.16 mm2 of chip area, which satisfies implantable devices requirements. © 2015 Trans Tech Publications, Switzerland.

关键词： Low pass filters

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A novel method of spike detection for interferograms based on two-step filtering

A novel method of spike detection for interferograms based o...

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4th International Conference on Frontiers of Manufacturing Science and Measuring technology, ICFMM 2014

作者： Zou, Yao Pu Han, Chang Pei Zhang, Lei Pan, Wen Gui Wang, Chao Key Laboratory of Infrared System Detection and Imaging Technology SITP UCAS China

ISBN: (纸本)9783038351924

According to the characteristics of interferogram, we design a new spike detection method, which firstly filters an interferogram with two different ways and then detects spikes based on both results. Theoretical analysis and computer simulation shows that this algorithm performs well in detecting spikes in any position of an interferogram with high accuracy, and can be easily implemented in hardware. © (2014) Trans Tech Publications, Switzerland.

关键词： Computer hardware

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A method to compensate the dead time for three-phase PWM inverters

A method to compensate the dead time for three-phase PWM inv...

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International Conference on Frontiers of Energy, Materials and Information Engineering, ICFMEI 2014

作者： Pan, Wen Gui Zhang, Lei Zou, Yao Pu Wang, Chao Han, Chang Pei Key Laboratory of Infrared System Detection and Imaging Technology SITP UCAS Shanghai China

ISBN: (纸本)9783038352778

As for a vector control of a permanent magnet synchronous motor, this paper analyzed the influence of dead-time effect of three-phase bridge inverters on output voltage and current in details. A novel on-line method was proposed for dead-time effect compensation based on disturbance observer. At last, the method is simulated using MATLAB and the simulation results proves the effectiveness and feasibility of the method presented. © (2014) Trans Tech Publications, Switzerland.

关键词： Pulse width modulation

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CMOS amplifier for neural signal recording applications

CMOS amplifier for neural signal recording applications

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16th Annual Conference and 5th International Conference on Chinese Society of Micro-Nano technology, CSMNT 2014

作者： Zhang, Zhang Cheng, Zhengxi Zhuang, Yiwei Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China State Key Laboratory of ASIC and System Fudan University Shanghai China School of Electronic Science and Applied Physics Hefei University of Technology Hefei Anhui China

ISBN: (纸本)9783038354628

关键词： Signal processing

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A design of on-board dual-channel data handling method based on two FPGAs 6

A design of on-board dual-channel data handling method based...

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6th International SpaceWire Conference, SpaceWire 2014

作者： Yaopu, Zou Jiayou, Jiang Changpei, Han Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics UCAS Shanghai China Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics CAS Shanghai China

ISBN: (纸本)9780955719653

SpaceWire is used on FY4 meteorological satellite as on-board data-handling network. Based on SpaceWire, this paper provides a design using two FPGAs and AT7911 chips for the dual-channel data processing of a payload on FY4 to ensure that data can be transported efficiently and reliably. This design has proved to be feasible when tested on the ground. © 2014 University of Dundee.

关键词： Data handling

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Design and simulation of image compensation control system

Design and simulation of image compensation control system

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2013 International Conference on Mechatronics and Automatic Control systems, ICMS 2013

作者： Tan, Chan Ding, Lei Key Laboratory of Infrared System Detection and Imaging Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China

ISBN: (纸本)9783319012728

Image compensation is a key to high resolution imaging. This paper designs and simulates an image compensation control system based on swing pointing mirror. The principle of pointing mirror compensation is presented and the mathematical model of pointing mirror's driving motor is established. Based on this model, a high accurate controller which consists of current loop and velocity loop is designed and simulated. Considering that there is disadvantage of traditional speed PID controller in dynamic performance, which is speed overshoot, the speed loop adopts pseudo derivative feed-forward (PDFF) controller. Theoretical analysis and simulation results show that the designed image compensation control system has good characteristic in following performance, dynamic response and noise resistance. © Springer International Publishing Switzerland 2014.

关键词： Controllers

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