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Unsupervised human height estimation from a single image

Journal of Biomedical Science and Engineering 2009年第6期2卷 425-430页

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

The single image containing only a human face not previously addressed in the literature is employed to estimate body height. The human face especially the facial vertical distribution possesses some important information which strongly correlates with the stature. The vertical proportions keep up relative constancy during the human growth. Only a few facial features such as the eyes, the lip and the chin are necessary to extract. The metric stature is estimated according to the statistical measurement sets and the facial vertical golden proportion. The estimated stature is tested with some individuals with only a single facial image. The performance of the proposed method is compared with some similar methods, which shows the proposal performs better. The experimental results highlight that the developed method estimates stature with high accuracy.

关键词： Human Height Estimation Golden Proportion Facial Proportion Feature Extraction Projection Model

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An improved dual field modular inversion algorithm and VLSI implementation

An improved dual field modular inversion algorithm and VLSI ...

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1st International Conference on Information Science and Engineering, ICISE2009

作者： Chen, Guanghua Zhu, Jingming Liu, Ming Zheng, Weifeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education and Microelectronic Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769538877

An improved dual filed modular inversion algorithm which can support inversion operation in both GF(P) and GF(2∧m) is proposed in this paper. Compared with previous ones based on Extended Euclidean algorithm, it not only finishes modular inversion arithmetic in dual fields, but also operates much faster by more effective shift operations and avoiding time-consuming magnitude comparison. The simple addition/subtraction becomes the most complex operation in the new algorithm while the multiplication/division is replaced by cheap shifting, and thus only two adders and one subtraction device are required to complete its hardware implementation. The 256-bit modular inversion circuit based on the improved algorithm is implemented in SMIC 0.18 CMOS standard cell technology. The synthesis result indicates that the design is about 17% faster than that of previous algorithms while the area is only 5% larger. ©2009 IEEE.

关键词： VLSI circuits

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Improvement of interleaved multiplication algorithm

Improvement of interleaved multiplication algorithm

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1st International Conference on Information Science and Engineering, ICISE2009

作者： Chen, Guanghua Liu, Ming Zhu, Jingming Zheng, Weifeng School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Power Station Automation Technology Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Microelectronic Research and Development Center Shanghai University Shanghai 200072 China

ISBN: (纸本)9780769538877

An improved modular multiplication algorithm based on the interleaved multiplication is presented in this paper. Carry save addition (CSA), redundant representation, a fast lookup table and a counter register are used to improve this algorithm. Carry save addition and redundant representation are used to replace other additions like carry select addition, carry lookahead addition and so on, because carry propagation brought by those additions can be prevented by carry save addition, and redundant representation can make the arithmetic operations fast without carry propagation. The fast lookup table with only 7 pre-calculated values can minimize the number of additions, and can only be addressed once in one iteration, which not only speed up, but also save area compared with other literatures used lookup tables. The iteration number can be reduced by a counter register being added in this improved method to compute the number of 0 from the most significant bit of one operand like X. Analysis and emulation result shows the area and time complexity (AT) of the improved method is equal or even less than 2n2. ©2009 IEEE.

关键词： Table lookup

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Interactive object segmentation using kernel density estimation based graph cuts

Interactive object segmentation using kernel density estimat...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Zhongmin Han Baoyan Ding Zhi Liu Liquan Shen Zhaoyang Zhang School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai China

This paper proposes an efficient and flexible interactive object segmentation approach using kernel density estimation based graph cuts. First, the user draws scribbles to roughly mark the interested object and background, respectively, and the likelihood of object versus background is evaluated for each pixel using nonparametric kernel density estimation. Then pixels are globally classified into object and background using graph cuts, which uses likelihood as data cost and gradient information to generate a spatial varying smoothness cost. If the user is not satisfied with the initially segmented object, the user is allowed to mark these undesirable regions by drawing additional scribbles. A local region for refinement is then adaptively determined, and pixel reclassification is performed to extract a more accurate object boundary. Experimental results on a variety of images demonstrate that interested objects with good visual quality can be extracted with less user interaction and a timely response.

关键词： Object segmentation Kernel Image segmentation Humans Iterative algorithms Data mining displays Pixel Cost function Parametric statistics

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Color correction method based on histogram segmentation for multiview video

Color correction method based on histogram segmentation for ...

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

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

Color differences between different views can cause performance degradation in multiview video coding. In order to overcome this problem, in this paper a local color correction method based on histogram segmentation is proposed. In the proposed method, we correct the color changes in the different segmentation regions between the current picture and the reference picture. Extensive experimental results demonstrate that the proposed method outperforms the traditional global linear color correction methods with objective mean of disparity values and subjective visual quality, and achieves better correction results.

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A jetting system for chip on glass package

A jetting system for chip on glass package

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

作者： Haili, Jia Zikai, Hua Maoyu, Li Jinsong, Zhang Jianhua, Zhang School Engineering and Engineering and Automation Shanghai University Shanghai City 200072 China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai City 200072 China

ISBN: (纸本)9781424446599

Jetting is regarded as the next generation dispensing technology due to its features of non-contact and high precision dispensing. In this paper, we developed a jetting system for chip-on-glass package consisting of a jetting dispenser and a 3-axis movement system. The jetting dispenser applied a concept of modular design to construct four modules, which were nozzle, actuator, feeder and temperature controller. To analyze the factors influencing the fluid jetting, the proper fluid and structure models were set up. In the jetting dispenser, we used a solenoid valve (f >100Hz) to provide a high-speed movement for a needle. In a dispensing process, a piston drove a needle to move reciprocate, and its stroke was measured and controlled by a micrometer. A 3-axis system was a platform for the installation of jetting dispenser, and supported a reciprocating motion to follow the programmed route. ©2009 IEEE.

关键词： Needles

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Salient Object Extraction Based on Region Saliency Ratio

Salient Object Extraction Based on Region Saliency Ratio

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International Conference on Computer and Information Science (ACIS)

作者： Zhongmin Han Zhi Liu Zhaoyang Zhang Yu Lu Weiwei Li Hongbo Yan School of Communication and Information Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China

This paper proposes an efficient approach to extract salient objects in an image. A scale-invariant saliency map is first constructed based on a multi-resolution feature contrast calculation, meanwhile the image is segmented into homogenous regions using nonparametric kernel density estimation (NKDE). Then the region saliency ratio of each region combination to its complement is calculated in turn. Finally, salient objects are extracted by maximizing the region saliency ratio. Experimental results demonstrate the effectiveness of the proposed approach.

关键词： Image segmentation Data mining Humans Object detection Information science Kernel displays Image retrieval Content based retrieval Robustness

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Fast mode decision for multiview video coding

Fast mode decision for multiview video coding

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IEEE International Conference on Image Processing

作者： Liquan Shen Tao Yan Zhi Liu Zhaoyang Zhang Ping An Lei Yang Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai China Physics Department EPS Heriot-Watt University Edinburgh UK

In the draft of multi-view coding (MVC), variable size motion estimation and disparity estimation are employed to select the best coding mode for each macroblock. These techniques achieve the highest possible coding efficiency, but they result in extremely large computation complexity which obstructs MVC from practical application. This paper proposes a fast mode size decision algorithm for MVC in inter-frame coding. It makes use of the mode distribution correlation between neighbor views to deduct the executions of unnecessary modes. Experimental results show that the proposed fast mode decision algorithm reduces the computational complexity significantly with negligible coding efficiency.

关键词： Video coding Motion estimation Computational complexity Video sequences displays Physics education Head Navigation Layout Automatic voltage control

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Single camera vision pointing recognition for natural HCI

Single camera vision pointing recognition for natural HCI

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

作者： Guan, Ye-Peng Xiong, Hui-Jun Yu, Yun-Jie 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 149 Yanchang Rd. Shanghai 200072 China

ISBN: (纸本)9781849191388

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.

关键词： Cameras

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Compressed sensing based channel estimation for fast fading OFDM systems

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Chinese Journal of systems Engineering and Electronics 2010年第4期000卷

作者： Xiaoping Zhou Yong Fang Min Wang Key Laboratory of Specialty Fiber Optics and Optical Access Networks School of Communication and Information EngineeringShanghai University Shanghai 200072 P. R. China Key Laboratory of Specialty Fiber Optics and Optical Access Networks School of Communication and Information EngineeringShanghai University Shanghai 200072 P. R. China Key Laboratory of Advanced Display and System Applications Shanghai 200072 P. R. China

A compressed sensing (CS) based channel estima-tion algorithm is proposed by using the delay-Doppler sparsity of the fast fading channel. A compressive basis expansion chan-nel model with sparsity in both time and frequency domains is given. The pilots in accordance with a novel random pilot ma-trix in both time and frequency domains are sent to measure the delay-Doppler sparsity channel. The relatively nonzero channel coefficients are tracked by random pilots at a sampling rate signifi-cantly below the Nyquist rate. The sparsity channels are estimated from a very limited number of channel measurements by the basis pursuit algorithm. The proposed algorithm can effectively improve the channel estimation performance when the number of pilot sym-bols is reduced with improvement of throughput efficiency.

关键词： compressed sensing sparse channel channel esti-mation fast fading

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