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2012 International Symposium on Intelligent Signal Processing and Communications Systems最新文献

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Hand gesture interface based on improved adaptive hand area detection and contour signature 基于改进的自适应手部区域检测和轮廓特征的手势界面
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-12-01 DOI: 10.1109/ISPACS.2012.6473534
Lei Gu, Xiaoyang Yuan, T. Ikenaga
{"title":"Hand gesture interface based on improved adaptive hand area detection and contour signature","authors":"Lei Gu, Xiaoyang Yuan, T. Ikenaga","doi":"10.1109/ISPACS.2012.6473534","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473534","url":null,"abstract":"HMD (head-mounted display) as a promising device is becoming more and more important in daily life. Many companies has been working on it for the next generation human-interface system. This paper presents a real-time hand gesture interface based on TSL (Hue, Saturation, Luminance) adaptive area detection and distance signature with single camera. First, apply self-adaptive skin color detection in TSL color space where skin color data can be clustered to segment hand area. Second, acquire the distance signatures from hand shape contours and obtain possible finger points which reduce the hand gesture recognition problem into finding peaks of one dimensional signature. Last, finger points are labeled by the information of signature. ROC (Receiver Operating Characteristic) Analysis shows the proposed hand area detection method always gives a result in feasible area (TPR>0.91, FPR<;0.1) which is suitable for the following contour analysis, indicating that it's more stable and robust compared with other skin color based methods. The evaluation results show the potential of real-time on PC at around 10 fps.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121716518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
An nonlinear amplify-and-forward protocol for cooperative communication networks 一种用于协作通信网络的非线性放大转发协议
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-12-01 DOI: 10.1109/ISPACS.2012.6473548
Lin Pan, Chen Liu, Feng Lu, Youhua Fu, Hua-An Zhao
{"title":"An nonlinear amplify-and-forward protocol for cooperative communication networks","authors":"Lin Pan, Chen Liu, Feng Lu, Youhua Fu, Hua-An Zhao","doi":"10.1109/ISPACS.2012.6473548","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473548","url":null,"abstract":"Cooperation diversity is a new technology of spatial diversity. It obtains diversity gain through a virtual antenna array which is formed by sharing resources among different users. We propose a new strategy called nonlinear amplify-and-forward (NAF) based on some fundamental strategies such as amplify-and-forward (AF) and decode-and-forward (DF) in cooperative communication networks. In this new strategy, we give a closed-form solution of the optimal signal estimation at the relay by the minimum mean square error (MMSE) criterion. Furthermore, it has been proved that NAF can help the destination to obtain a higher SNR than AF and prevent the case in DF that all power is used to transmit the incorrect signals. Both of the theoretical analysis and simulation results show that NAF outperforms AF and DF, and it can achieve full spatial diversity.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133554253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An improved wavelet-tree watermarking scheme 一种改进的小波树水印方案
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-12-01 DOI: 10.1109/ISPACS.2012.6473495
Chunqiang Lin, Chung-Yen Su
{"title":"An improved wavelet-tree watermarking scheme","authors":"Chunqiang Lin, Chung-Yen Su","doi":"10.1109/ISPACS.2012.6473495","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473495","url":null,"abstract":"This paper presents an improved wavelet-tree watermarking scheme for copyright protection. We decompose an image into four-level subbands and group the subband coefficients into many wavelet-trees. The N-bit watermark is embedded into the first N shuffled trees. An improved scheme based on changing only one coefficient of each tree is proposed to embed a watermark bit. Compared with the previous wavelet-tree watermarking scheme, the proposed scheme not only can improve the image quality but also can speed up the execution of watermark embedding. Experimental results are shown to demonstrate the effectiveness of the proposed scheme.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122611278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
TPUnit neural network and simple ensemble for abnormal shadow detection in lung X-ray images TPUnit神经网络和简单集成用于肺部x线图像异常阴影检测
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-12-01 DOI: 10.1109/ISPACS.2012.6473497
A. Ikeda, Hiroki Yoshimura, Maiya Hori, Tadaaki Shimizu, Y. Iwai, S. Kishida
{"title":"TPUnit neural network and simple ensemble for abnormal shadow detection in lung X-ray images","authors":"A. Ikeda, Hiroki Yoshimura, Maiya Hori, Tadaaki Shimizu, Y. Iwai, S. Kishida","doi":"10.1109/ISPACS.2012.6473497","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473497","url":null,"abstract":"We have constructed systems that detect abnormal areas of lung X-ray images from one-dimensional numeric sequences using neural networks. In these systems, the neural network consists of neurons that use trigonometric polynomials as activation functions, or TPUnit neural networks. The TPunit neural network has a high generalization ability in a smaller number of hidden units. Several TPUnit neural networks are placed in parallel and their outputs are processed as a simple ensemble. ROC curves denoted performance greater than that of previous reports. In addition, the AUC (area under curve) value was 0.9998 and the EER (equal error rate) was 0.5363%. Experimental results indicate that this proposed system is useful for medical imaging diagnosis.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"31 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123154847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Speaker dependent visual word recognition by using sequential mouth shape codes 基于顺序口型代码的说话人依赖视觉词识别
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473460
Takuro Tasaka, N. Hamada
{"title":"Speaker dependent visual word recognition by using sequential mouth shape codes","authors":"Takuro Tasaka, N. Hamada","doi":"10.1109/ISPACS.2012.6473460","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473460","url":null,"abstract":"Visual speech recognition or lip reading is an approach for noise robust speech recognition by adding speaker's visual cues to audio information. Basically visual-only speech recognition is applicable to speaker verification and multimedia interface for supporting speaking impaired person. The sequential mouth-shape code method is an effective approach of lip reading for particularly uttered Japanese words by utilizing two kinds of distinctive mouth shapes, known as first and last mouth shapes, appeared intermittently. One advantage of this method is its low computational burden for the learning and word registration processes. This paper proposes a novel word lip recognition system by detecting and determining initial mouth-shape codes to recognize uttering consonants. The proposed method eventually is able to discriminate different words consisting of the same sequential vowel codes though containing different consonant codes. The conducted experiments demonstrate that the proposed system provides higher recognition rate than the conventional ones.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116793387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Algorithm and hardware architecture of high accuracy IQ imbalance estimation and compensation for OFDM system OFDM系统高精度IQ不平衡估计与补偿算法及硬件结构
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473574
F. Dwiyasa, R. Karlina, T. Adiono
{"title":"Algorithm and hardware architecture of high accuracy IQ imbalance estimation and compensation for OFDM system","authors":"F. Dwiyasa, R. Karlina, T. Adiono","doi":"10.1109/ISPACS.2012.6473574","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473574","url":null,"abstract":"IQ imbalance is one of the most serious problems in direct-conversion receiver because it introduces signal constellation error and channel estimation error which lead to worse bit error rate. In this paper, we present algorithm and hardware architecture of IQ imbalance estimation and compensation in an OFDM system based on IEEE 802.16-2009 Fixed WiMAX standard. In order to accurately estimate the IQ imbalance, we use estimation in both time domain and frequency domain. The estimation is adaptively changed between time and frequency domain based on the estimated CFO. We also propose an architecture of IQ imbalance estimation and compensation which employs CORDIC and resource sharing method. Performance of the architecture was verified by confirming that MSE of the bit-precision model is not significantly deteriorated compared with the floating-point model in all tested channel models and CFO variations.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Saturation adjustment method based on human vision with YCbCr color model characteristics and luminance changes 基于人眼视觉的YCbCr色彩模型特征和亮度变化的饱和度调整方法
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473467
Jen-Shiun Chiang, Chih-Hsien Hsia, Hao-Wei Peng, Chun-Hung Lien, Hsin-Ting Li
{"title":"Saturation adjustment method based on human vision with YCbCr color model characteristics and luminance changes","authors":"Jen-Shiun Chiang, Chih-Hsien Hsia, Hao-Wei Peng, Chun-Hung Lien, Hsin-Ting Li","doi":"10.1109/ISPACS.2012.6473467","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473467","url":null,"abstract":"This paper proposes a saturation adjustment method based on human vision with YCbCr color model characteristics and luminance changes. In the traditional color adjustment approach, people tried to separately adjust the luminance and saturation. However, this approach makes the color over-saturate very easily and makes the image look unnatural. In this work, we try to use the concept of exposure compensation to simulate the brightness changes and to find the relationship among luminance, saturation, and hue. The simulation indicates that saturation changes with the change of luminance and the simulation also shows there are certain relationships between color variation model and YCbCr color model. Together with all these symptoms, we also include the human vision characteristics to propose a new saturation method to enhance the vision effect of an image. The experimental results show that the proposed approach can make the image have better vivid and contrast. Most important of all, unlike the over-saturation caused by the conventional approach, our approach prevents over-saturation and further makes the adjusted image look natural.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125943484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Fault tolerance for rapidly recovering communication path in a monitoring network of tree topology 树形拓扑监控网络中快速恢复通信路径的容错性
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473595
Chi-Chun Chen, S. Lai, San-Fu Wang, Chang-Hsien Chen
{"title":"Fault tolerance for rapidly recovering communication path in a monitoring network of tree topology","authors":"Chi-Chun Chen, S. Lai, San-Fu Wang, Chang-Hsien Chen","doi":"10.1109/ISPACS.2012.6473595","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473595","url":null,"abstract":"Master devices, slave devices, system, and methods thereof in a master-slave tree network are provided. The system comprises a master device and a plurality of slave devices. The method is performed by a first slave device, comprises distributing a first beacon to a second slave device upon determining no beacon being received in a predetermined period; determining a neighboring node from a neighboring node list to establish an alternative connection to the master device, and requesting a new node identifier identifying the first slave device from the master device, thereby completing establishment of the alternative connection.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125557192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rendering-trajectory-based hole filling in free view generation 自由视图生成中基于渲染轨迹的孔洞填充
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473592
Ting-Lan Lin, Uday Singh Thakur, Rayhong Syu
{"title":"Rendering-trajectory-based hole filling in free view generation","authors":"Ting-Lan Lin, Uday Singh Thakur, Rayhong Syu","doi":"10.1109/ISPACS.2012.6473592","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473592","url":null,"abstract":"High quality view generation and interpolation is a crucial problem for the success of 3D video systems. It is known that interpolation artifacts especially occur along object boundaries where depth values fluctuate. We therefore present a novel view interpolation algorithm that introduces specific processing without producing any geometric distortion. The paper also describes the method to solve the problem of wrongly exposed pixels in depth image based rendering (DIBR) which degrade the quality of intermediate view.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126935941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance of the MIMO PRCP-OFDM system with orthogonal cyclic-shift sequences 正交周期移位MIMO PRCP-OFDM系统的性能
2012 International Symposium on Intelligent Signal Processing and Communications Systems Pub Date : 2012-11-01 DOI: 10.1109/ISPACS.2012.6473551
Shiunn-Jang Chern, Yu-Shiou Huang, Y. Jan, Richard Hsin-Hsyong Yang
{"title":"Performance of the MIMO PRCP-OFDM system with orthogonal cyclic-shift sequences","authors":"Shiunn-Jang Chern, Yu-Shiou Huang, Y. Jan, Richard Hsin-Hsyong Yang","doi":"10.1109/ISPACS.2012.6473551","DOIUrl":"https://doi.org/10.1109/ISPACS.2012.6473551","url":null,"abstract":"Unlike the conventional Pseudo-Random Posfix (PRP) orthogonal frequency division multiplexing (OFDM) or PRP-OFDM approach, recently we proposed a new transceiver framework for OFDM system, named as the Pseudo Random Cyclic Postfix (PRCP)-OFDM, with complementary codes (CC). Also, it was extended to the multiple-input multiple-output (MIMO) antennas system, equipped with the space-time block code (SP-BC). In this paper, the cyclic postfix (CP) sequence is implemented with the Orthogonal Cyclic-shift (OCS) sequences to substitute the CC. By exploring the useful property of OCS sequences, convolved with channel information, at receiver side it can be employed to perform semi-blind channel estimation without incurring the signal interference to the desired postfix sequences. It is affected only by the background noise, and yields achieving better system performance. To demonstrate the merits of proposed ST-BC MIMO PRCP-OFDM system the performance is investigated and further compared with the ST-BC MIMO PRP-OFDM system and ST-BC MIMO CP-OFDM system with optimal training pilots, under various channel environments.","PeriodicalId":158744,"journal":{"name":"2012 International Symposium on Intelligent Signal Processing and Communications Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122507790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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