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检索条件"机构=Key Laboratory of advanced Display and System Application"

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A Motion Attention Model Based Rate Control Algorithm for H.264/AVC

A Motion Attention Model Based Rate Control Algorithm for H....

引用

International Conference on Computer and Information Science (ACIS)

作者： Zhi Liu Hongbo Yan Liquan Shen Yongfang Wang Zhaoyang Zhang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Shanghai University Ministry of Education of China Shanghai China

Rate control plays a very important role in video streaming applications. The currently adopted rate control scheme in the latest video coding standard H.264/AVC still results in a relatively large quality fluctuation especially for frames with higher motion activities. In this paper, we consider the characteristics of human visual system and incorporate a motion attention model to direct the rate control process. From the motion vector (MV) field at 4times4 block level, motion saliency maps are calculated on multi-scale MV fields and integrated to a whole motion saliency map highlighting the attention regions. In the frame and MB layer of rate control, the number of bits allocated to each frame and each MB is adjusted based on its motion saliency. More bits are allocated those frames and MBs with higher motion saliency to improve their qualities, and thus reduce the quality variation. Experimental results demonstrate that our algorithm can increase the average PSNR by 0.068 dB, and decreases the PSNR variation by 15.65%, with a negligible increase of computation less than 3%.

关键词： Motion control Automatic voltage control Humans Streaming media Video coding Video sequences Communication system control Visual system Fluctuations PSNR

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Non-wearable pointing gesture recognition based on single optimal view camera

Non-wearable pointing gesture recognition based on single op...

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2009 2nd International Conference on Computer Science and Its applications, CSA 2009

作者： Guan, Ye-Peng School of Communication and Information Engineering Shanghai University 149 Yanchang Rd. Shanghai 200072 China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai University 149 Yanchang Rd. Shanghai 200072 China

ISBN: (纸本)9781424449460

Hand gestures play a natural and intuitive communication mode for human dialogs. A novel method is proposed to analyze pointing gestures. Single un-calibrated camera is employed to determine the pointing target based on the best view selected from multiple cameras. Face skin information is explicitly adopted as view quality for selecting the best view. View measurement has been developed which overcomes the effects of camera view directions and the distances between the user and the camera. No explicit constraints are set on the camera placement. Pointing users can move freely inside a wider interaction environment while pointing at some targets. The mentioned model does not constrain whether the pointing surface is flat or not. During detecting pointing users from a clutter background, multi-scale wavelet features with outstanding local characteristics both in temporal and spatial fields are used which would not require some information necessary for existing methods in literature such as scene learning and training, manual calibration, and a priori hypothesis. Experiments have highlighted that the developed approach is efficient for natural non-wearable pointing recognition by comparison. © 2009 IEEE.

关键词： Cameras

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Research and hardware implementation of image enhancement algorithm in OLED system

Research and hardware implementation of image enhancement al...

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2009 International Conference on Optical Instruments and Technology, OIT 2009

作者： Meihua, Xu Ke, Li Yule, Fan School of Mechatronical Engineering and Automation China Microelectronic Research and Development Center Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education Campus P.O.B. 110 149 Yanchang Rd Shanghai 200072 China

ISBN: (纸本)9780819478924

During the process of generation and transmission, images will be influenced by the performance of imaging system, quantization noise or some other actors. The image will appear some phenomenons like clarity decrease and low contrast. For the sake of improving the picture quality in OLED system, time sequence control logic and hardware of the whole OLED system were implemented based on the detailed analysis of OLED panel electrical characteristics and various gray scale scanning principles. Sub-field scanning working mode is adopted in the design. Gray scale is 64 and vertical sweep frequency is 60Hz∼*** is the core control device in the whole system, the DVI decoded signal is processed. The design realizes the real-time video display on OLED. The utilization of parameters regulated homomorphic filtering technology is studied to improve the quality of color image. At first, the high and low frequency parts are departed with the help of illumination reflectance *** the digital image is processed with approximate high-pass filter, the simplified filtering algorithm made a compromise solution between the complex of hardware implementation and image quality. In the end, by the frequency domain inverse transformation, images got enhanced. The experiment results show that the particular information extrudes and the whole visual effect is improved after the process. © 2009 SPIE.

关键词： Image enhancement

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Automatic Optimal View Selection for Natural HCI

Automatic Optimal View Selection for Natural HCI

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Congress on Image and Signal Processing, CISP

作者： Ye-Peng Guan School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education China

Multiple cameras can be used to detect a certain object in a wide area so that users can freely move inside a wider interaction environment. One key problem is how to select the most appropriate camera with better view to perform a natural human-machine-interaction (HCI). An unsupervised scheme is developed for a best view selection. Face skin information is explicitly employed as view quality. The proposed view measurement has been defined which facilitates the system to select the most appropriate camera automatically. The proposal overcomes the effects of camera view directions and the distances between the user and the camera in selecting the best view. The approach is tested with different face databases and an actual interaction environment which shows that it is flexible and computational cost-effective. Experiments have highlighted that the mentioned method is robust and efficient when selecting the best view in a multi-camera system.

关键词： Human computer interaction Cameras Object detection Face detection Skin Proposals Testing Databases Computational efficiency Robustness

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Single camera vision pointing recognition for natural HCI

Single camera vision pointing recognition for natural HCI

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IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2009)

作者： Ye-Peng Guan Hui-Jun Xiong Yun-Jie Yu School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Displays and System Application Ministry of Education Shanghai China

A novel method is proposed to analyze pointing recognition based on a single un-calibrated camera. Face skin information is explicitly adopted as view quality in selecting the best view from multiple cameras. View measurement has been developed to overcome the effects from camera view directions and the distances between the user and the camera. No explicit constraints are set on the camera placement. Pointing users can move freely inside a wider interaction environment while pointing at some targets. The mentioned model does not constrain whether the pointing surface is flat or not. Experiments have highlighted that the proposed method is efficient and the performance of pointing recognition from the optimal viewpoint camera outperforms other cameras.

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Studies on microstructure of Epoxy Molding Compound (EMC)-leadframe interface after environmental aging

Studies on microstructure of Epoxy Molding Compound (EMC)-le...

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2009 International Conference on Electronic Packaging Technology and High Density Packaging, ICEPT-HDP 2009

作者： Xiuzhen, Lu Li, Xu Huaxiang, Lai Xinyu, Du Johan, Liu Zhaonian, Cheng Key Laboratory of Advanced Display and System Applications School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China Henkel Corporation 15350 Barranca Pkwy Irvine CA 92618 United States SMIT Center and Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology SE-412 96 Gothenburg Sweden

ISBN: (纸本)9781424446599

The Leadframe-Epoxy molding compound (EMC) interface is known to be one of the weakest interfaces in an electronic packaging exhibiting delamination during reliability test. Interfaces of EMC and leadframes with different metal coatings exhibit different failure mode behavior after environmental aging because of the different adhesion strengths. In this paper, the interface microstructure of EMC-leadframes with different metal coatings was studied using Scanning Electron Microscopy (SEM). The leadframes used in this study were copper, copper with Ag coating, Ni coating and Ni/Pd/Au coating. The results of tab pull testing showed the adhesion strength of the EMC/copper leadframe interface was strongest while that of the EMC/leadframe with Ni/Pd/Au coating interface was weakest. Little delamination appeared on the EMC/Cu sample, including the samples after the moisture and reflow treatment. Delamination appeared on the interface of EMC/leadframe with Ag coating after treatment, and serious delamination was found on the interface of EMC/leadframe with Ni coating. The SEM micrographs showed that there were some microcracks between the filler of EMC and the leadframe. ©2009 IEEE.

关键词： Adhesion

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Design of RKE system Based on KEELOQ Encryption Technology

Design of RKE System Based on KEELOQ Encryption Technology

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International Conference on Artificial Intelligence and Computational Intelligence (AICI)

作者： Yue-li Hu Yan Zhang Bin Sun Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China Shanghai University Shanghai Shanghai CN

KEELOQ code hopping technology is a nonlinear anti-encryption algorithm designed for secure Remote keyless Entry (RKE) systems. It combines a 66-bits transmission length, so as to prevent the system from code predicting, code grabbing and code scanning. Because of its feature of high-security, it effectively overcomes the disadvantages of the traditional fixed code technology. This paper researched on KEELOQ encryption algorithm and presented a designed RKE system based on KEELOQ technology. When the software and hardware were designed, the whole RKE system was afterwards made as a prototype for the functionality tests. The experimental results showed that the design achieved the anticipative effects.

关键词： Cryptography Decoding Information security Counting circuits Automation Laboratories Algorithm design and analysis NIST Data security Manufacturing

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Adhesion behavior between epoxy molding compound and different leadframes in plastic packaging

Adhesion behavior between epoxy molding compound and differe...

引用

2009 International Conference on Electronic Packaging Technology and High Density Packaging, ICEPT-HDP 2009

作者： Li, Xu Xiuzhen, Lu Johan, Liu Xinyu, Du Yan, Zhang Zhaonian, Cheng Key Laboratory of Advanced Display and System Applications School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China Henkel Corporation 15350 Barranca Pkwy Irvine CA 92618 United States SMIT Center and Bionano Systems Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology SE-412 96 Gothenburg Sweden

ISBN: (纸本)9781424446599

Adhesion has been identified as one of the key elements in solving failure problems in electronic packaging. Understanding and improving the adhesion between epoxy molding compound (EMC) and leadframes is thought to be a key step towards improving package performance. The objective of this work was to study the effect on adhesion behavior and delamination of plastic packages using various metal coated leadframes that had been subjected to preconditions. In this work, the effects of moisture absorption testing and reflow process on the interface adhesion strength of the EMC/metal leadframes were studied. Three kinds of metal coated leadframes were used: copper, silver coated copper and nickel/palladium/gold coated copper. Adhesion strength was measured using the tab pull test. These data were correlated to some extent with the findings of package delamination observed by the C-mode Scanning Acoustic Microscope (C-SAM). Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) were employed to characterize the surface of EMC and metal leadframes after separation along the vertical plane. ©2009 IEEE.

关键词： Adhesion

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Scheduling of balancing WSC for minimum IP testing time

Scheduling of balancing WSC for minimum IP testing time

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Institution of Engineering and Technology International Communication Conference on Wireless Mobile and Computing

作者： Zhang, Jinyi Cai, Wanlin Li, Jiao Huang, Xuhui Weng, Hanyi Key Laboratory of Special Fiber Optics and Optical Access Networks Ministry of Education Shanghai University No. 149 Yanchang Road Shanghai 200072 China Microelectronic Research and Development Center Shanghai University No. 149 Yanchang Road Shanghai 200072 China Key Laboratory of Advanced Displays and system Application Ministry of Education Shanghai University No. 149 Yanchang Road Shanghai 200072 China

ISBN: (纸本)9781849191388

Today the research on designing for testability is becoming very important in the filed of SoC. However, the traditional research is limited in top level of SoC. It does not really guarantee to improve the utilization of test resource of SoC and reduce the test time effectively in theory. This paper proposes that the focus of study will be extended to the IP core level. We can reduce the percentage of idle test time and achieve the minimum of test time in various IP cores through the establishment of scheduling strategy of balancing WSC (Wrapper Scan Chain) and the exchange ISC (Inter Scan Chain) heuristic algorithm. In this paper, we verify the scheduling strategy of balancing WSC in algorithm and reusability upon the ITC'02 benchmarks. The results show that the vast majority of percentage of idle test time is much less than 1% in the relationship set between the number m of balanced WSC and the test time TIP within each IP core. The results also can verify the importance of the research programme which is implemented in IP core level for improving the utilization of test resource and reducing the test time effectively in SOC.

关键词： Scheduling

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Test scheduling of SOC IP interconnect for static and SI faults

Test scheduling of SOC IP interconnect for static and SI fau...

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Institution of Engineering and Technology International Communication Conference on Wireless Mobile and Computing

作者： Jinyi, Zhang Xiaodong, Yang Dong, Zhang Yi, Yang Key Laboratory of Special Fiber Optics and Optical Access Networks Ministry of Education Shanghai University No. 149 Yanchang Road Shanghai 200072 China Microelectronic Research and Development Center Shanghai University No. 149 Yanchang Road Shanghai 200072 China Key Laboratory of Advanced Displays and system Application Ministry of Education Shanghai University No. 149 Yanchang Road Shanghai 200072 China

ISBN: (纸本)9781849191388

This paper proposes a scheduling method of SOC (system on Chip) interconnect test complied with IEEE Std 1500 based on Genetic Algorithm. The algorithm figures out optimal scheduling of interconnect test for high utility of TAM (Test Access Mechanism) width, and eight fixed test patterns are used to cover static and Signal Integrity faults based on MA (Maximum Aggressor faults model) for specific victim. Experiment is implemented in ITC'02 benchmark to prove the effectiveness of the algorithm solved with MATLAB toolbox.

关键词： Genetic algorithms

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