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Optimal video communication strategy for intelligent video analysis in unmanned aerial vehicle applications

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Chinese Journal of Aeronautics 2020年第11期33卷 2921-2929页

作者： Yongqiang XIE Zhongbo LI Jin QI Kai ZHANG Bixuan ZHANG Feng QI Institute of Systems Engineering Academy of Military SciencesPLABeijing 100141China National Engineering Laboratory for video Technology Peking UniversityBeijing 100871China

For Unmanned Aerial Vehicles(UAV),the intelligent video analysis is a key technology in intelligent autonomous control,real-time navigation and ***,poor UAV wireless links would degrade the quality of video communication,leading to difficulties in video *** meet the challenges of packet-loss and limited bandwidth in adverse UAV channel environments,this paper proposes a parameter optimization mechanism for UAV intelligent video *** the proposed method,an Optimal Strategy Library(OSL)is designed to optimize the parameters for video encoding and forward error *** to the packet-loss rate and bandwidth in practical UAV wireless network,the proposed OSL can facilitate the encoding of video sequences and the recovery of degraded videos with optimal *** results demonstrate that the proposed solution can keep intelligent video analysis working efficiently with adverse UAV wireless links,and is capable of maximizing the inference accuracy of Multi-Object Tracking(MOT)algorithms in various scenarios.

关键词： Forward error correction Intelligent video analysis Multi-Object Tracking(MOT) Optimal strategies UAVs video communication

A video Watermarking DRM Method Based on H.264 Compressed Domain with Low Bit-Rate Increasement

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Chinese Journal of Electronics 2016年第4期25卷 641-647页

作者： MA Zhaofeng HUANG Jianqing JIANG Ming NIU Xinxin Information Security Center of Beijing University of Posts and Telecommunications Library of Beijing University of Posts and Telecommunications Audio and video Department the Third Research Institute of China Electronics Technology Group Corporation

It gets more and more important for video copyright protection,it is necessary to provide efficient H.264 compression domain watermarking for video Digital rights management(DRM).A new watermarking method based on H.264 compressed domain is proposed for video DRM,in which the embedding and extracting procedure are performed using the syntactic elements of the compressed bit *** this way,complete decoding is unnecessary in both embedding and extracting *** on the analysis of the time and space,some appropriate sub-blocks are selected for embedding watermarks,increasing watermark robustness while reducing the declination of the visual *** order to avoid bit-rate increasing and strengthen the security of the proposed video watermarking scheme,only a set of nonzero coefficients quantized in different parts of macroblocks is chosen for inserting *** experiment results show the proposed scheme can achieve excellent robustness against some common attacks,the proposed scheme is secure and efficient for video content DRM protection.

关键词： video watermarking H.264 Temporal quality Compressed domain watermarking

Correction of Inertial Navigation System’s Errors by the Help of video-Based Navigator Based on Digital Terrarium Map

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Positioning 2013年第1期4卷 89-108页

作者： Oleg Yurjevich Kupervasser Alexander Alexandrovich Rubinstein Transist video Ltd. Skolkovo Resident Russia

This paper deals with the error analysis of a novel navigation algorithm that uses as input the sequence of images acquired from a moving camera and a Digital Terrain (or Elevation) Map (DTM/DEM). More specifically, it has been shown that the optical flow derived from two consecutive camera frames can be used in combination with a DTM to estimate the position, orientation and ego-motion parameters of the moving camera. As opposed to previous works, the proposed approach does not require an intermediate explicit reconstruction of the 3D world. In the present work the sensitivity of the algorithm outlined above is studied. The main sources for errors are identified to be the optical-flow evaluation and computation, the quality of the information about the terrain, the structure of the observed terrain and the trajectory of the camera. By assuming appropriate characterization of these error sources, a closed form expression for the uncertainty of the pose and motion of the camera is first developed and then the influence of these factors is confirmed using extensive numerical simulations. The main conclusion of this paper is to establish that the proposed navigation algorithm generates accurate estimates for reasonable scenarios and error sources, and thus can be effectively used as part of a navigation system of autonomous vehicles.

关键词： video-Based Navigator Digital Terrarium Map Autonomous Vehicles Inertial Navigation

Design and Implementation of Blackfin DSP-based video Encoder in Network Surveillance System

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Design and Implementation of Blackfin DSP-based Video Encode...

Real-time traffic information extraction based on compressed video with interframe motion vector

2006 8th International Conference on Signal Processing

作者： Zhaohui Li Dongmei Li Qi Zhang Qiong Wu Institute of Digital video Technology Communication University of China

＜正＞video encoder is an important part of video network surveillance system,and its design goals include combining real time coding,high performance,low cost and flexible control with small *** meet all these requirements,DSPs with video ports provide an ideal *** this paper,we’ve designed and implemented a Blackfin DSP-based,high performance, low cost,low power consumption,real time network video *** hardware system,software flow, algorithm optimization,Ethernet transmission and performance test are discussed in *** network video encoder has been successfully used in our MPEG-4,H.263 network video surveillance system.

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Journal of Harbin Institute of Technology(New Series) 2003年第3期10卷 284-289页

作者：黄庆明王聪 Joint R&D Lab Graduate School Chinese Academy of Sciences Beijing 100080 China School of Astronautics Harbin Institute of Technology Harbin 150001 Chinaxtraction of traffic information from image or video sequence is a hot research topic in intelligent transportation system and computer vision. A real-time traffic information extraction method based on compressed video with interframe motion vectors for speed density and flow detection has been proposed for extraction of traffic information under fixed camera setting and well-defined environment. The motion vectors are first separated from the compressed video streams and then filtered to eliminate incorrect and noisy vectors using the well-defined environmental knowledge. By applying the projective transform and using the filtered motion vectors speed can be calculated from motion vector statistics density can be estimated using the motion vector occupancy and flow can be detected using the combination of speed and density. The embodiment of a prototype system for sky camera traffic monitoring using the MPEG video has been implemented and experimental results proved the effectiveness of the method proposed.

Extraction of traffic information from image or video sequence is a hot research topic in intelligenttransportation system and computer vision. A real-time traffic information extraction method based on com-pressed video with interframe motion vectors for speed, density and flow detection, has been proposed for ex-traction of traffic information under fixed camera setting and well-defined environment. The motion vectors arefirst separated from the compressed video streams, and then filtered to eliminate incorrect and noisy vectors u-sing the well-defined environmental knowledge. By applying the projective transform and using the filtered mo-tion vectors, speed can be calculated from motion vector statistics, density can be estimated using the motionvector occupancy, and flow can be detected using the combination of speed and density. The embodiment of aprototype system for sky camera traffic monitoring using the MPEG video has been implemented, and experi-mental results proved the effectiveness of the method proposed.

关键词： extraction of traffic information Interframe motion vector compressed video stream

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8mm video TECHNOLOGY

8mm VIDEO TECHNOLOGY

Variable Bit Rate Fuzzy Control for Low Delay video Coding

1992 International Symposium on Consumer Electronics(ISCE’92,Beijing)

作者： Jun Hirai Control System Development Dept.No.2 Consumer Video Development GroupSony Corporation Video Technology Center5-9-12Kitashinagawa Shinagawa-kuTokyo141 Japan

＜正＞INTRODUCTION We have been developing and producing a significant number of 8mm *** we introduced the 8mm camcorders in 1985,they have been highly appreciated in the market for their compactness and excellent picture quality. Sales of 8mm video deck are gradually expanding as a result of its library compactness,beautiful picture quality and as an editing tool. I would like to expand further and clarify the above mentioned reasons of our success focusing on the matter of video format There are two major parts to this *** first part is about 8mm video

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ZTE Communications 2017年第2期15卷 55-65页

作者： ZHONG Min ZHOU Yimin LUO Minke ZUO Wen School of Computer Science and Engineering University of Electronic Science and Technology of China Audio and video Technology Platform Department ZTE Corporation

Rate control plays a critical role in achieving perceivable video quality under a variable bit rate,limited buffer sizes and low delay *** a rate control system exhibits non-linear and unpredictable characteristics,it is difficult to establish a very accurate rate-distortion(R-D)model and acquire effective rate control *** the excellent control ability and low computing complexity of the fuzzy logic in non-linear systems,this paper proposes a bitrate control algorithm based on a fuzzy controller,named the Fuzzy Rate Control Algorithm(FRCA),for All-Intra(AI)and low-delay(LD)video source *** of the proposed FRCA mainly consist of four ***,fuzzy logic is adopted to minimize the deviation between the actual and the target buffer size in the hypothetical reference decoder(HRD).Second,a fast lookup table is employed in fuzzy rate control,which reduces computing cost of the control ***,an input domain determination scheme is proposed to improve the precision of the fuzzy ***,a novel scene change detection is introduced and integrated in the FRCA to adaptively adjust the Group-of-Pictures(GOP)length when the source content *** FRCA can be transplanted and implemented in various industry *** experiments show that the FRCA has accurate variable bit-rate control ability and maintains a steady buffer size during the encoding *** with the default configuration encoding under AI and LD,the proposed FRCA can achieve the target bit rates more accurately in various classical encoders.

关键词： rate control video coding fuzzy control bit per pixel rate-distortion model

Salient object extraction for user-targeted video content association

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第11期11卷 850-859页

作者： Jia LI Han-nan YU Yong-hong TIAN Tie-jun HUANG Wen GAO Key Lab of lntelligent Information Processing Institute of Computing Technology Chinese Academy of Scienees Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China National Engineering Lab for video Technology (NEL VT) School of EE & CS Peking University Beijing 100871 China

The increasing amount of videos on the Internet and digital libraries highlights the necessity and importance of interactive video services such as automatically associating additional materials(e.g.,advertising logos and relevant selling information) with the video content so as to enrich the viewing *** this end,this paper presents a novel approach for user-targeted video content association(VCA) .In this approach,the salient objects are extracted automatically from the video stream using complementary saliency *** to these salient objects,the VCA system can push the related logo images to the *** the salient objects often correspond to important video content,the associated images can be considered as *** VCA system also allows users to associate images to the preferred video content through simple interactions by the mouse and an infrared ***,by learning the preference of each user through collecting feedbacks on the pulled or pushed images,the VCA system can provide user-targeted *** results show that our approach can effectively and efficiently extract the salient ***,subjective evaluations show that our system can provide content-related and user-targeted VCA services in a less intrusive way.

关键词： Salient object extraction User-targeted video content association Complementary saliency maps

A novel video object tracking approach using bidirectional projection

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Chinese Optics Letters 2004年第7期2卷 390-392页

作者：刘志杨杰 Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai 200030 Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai 200030his paper proposes a novel video object tracking approach using birdirectional projection. Forward projection is exploited to locate the current video object with rough boundary information. Watershed segmentation is applied to the simplified gradient image of the current frame to obtain a reasonable partition. An improved backward projection which incorporates pixel classification with region classification is performed on some segmented regions in a rather small search range and the tracking performance is enhanced in respect to both reliability and efficiency. Experimental results for various types of the MPEG-4 (moving picture experts group) test sequences demonstrate an efficient and faithful segmentation performance of the proposed approach.

This paper proposes a novel video object tracking approach using birdirectional projection. Forward projection is exploited to locate the current video object with rough boundary information. Watershed segmentation is applied to the simplified gradient image of the current frame to obtain a reasonable partition. An improved backward projection, which incorporates pixel classification with region classification, is performed on some segmented regions in a rather small search range, and the tracking performance is enhanced in respect to both reliability and efficiency. Experimental results for various types of the MPEG-4 (moving picture experts group) test sequences demonstrate an efficient and faithful segmentation performance of the proposed approach.

关键词： Segmentation video