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2014 19th International Conference on Digital Signal Processing最新文献

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Dictionary based action video classification with action bank 基于字典的动作视频分类与动作库
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900734
S. Wilson, M. Srinivas, C. Mohan
{"title":"Dictionary based action video classification with action bank","authors":"S. Wilson, M. Srinivas, C. Mohan","doi":"10.1109/ICDSP.2014.6900734","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900734","url":null,"abstract":"Classifying action videos became challenging problem in computer vision community. In this work, action videos are represented by dictionaries which are learned by online dictionary learning (ODL). Here, we have used two simple measures to classify action videos, reconstruction error and projection. Sparse approximation algorithm LASSO is used to reconstruct test video and reconstruction error is calculated for each of the dictionaries. To get another discriminative measure projection, the test vector is projected onto the atoms in the dictionary. Minimum reconstruction error and maximum projection give information regarding the action category of the test vector. With action bank as a feature vector, our best performance is 59.3% on UCF50 (benchmark is 57.9%), 97.7% on KTH (benchmark is 98.2%)and 23.63% on HMDB51 (benchmark is 26.9%).","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125261268","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: 4
A preliminary study of in vivo muscle behavior during walking among hemiplegia patients 偏瘫患者行走时体内肌肉行为的初步研究
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900762
Sheng Zhong, Yongjin Zhou, Kai Zhan, Huiying Wen, Xin Chen, Wanzhang Yang, Yun Xiang
{"title":"A preliminary study of in vivo muscle behavior during walking among hemiplegia patients","authors":"Sheng Zhong, Yongjin Zhou, Kai Zhan, Huiying Wen, Xin Chen, Wanzhang Yang, Yun Xiang","doi":"10.1109/ICDSP.2014.6900762","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900762","url":null,"abstract":"How to quantitatively evaluate the hemiplegia level for a hemiplegia patient is still a challenging problem. In this study, we proposed an innovative method to investigate the in vivo muscle behavior of hemiplegia patient. We developed an experimental platform for simultaneous acquisition of ultrasonography (US), electromyography (EMG), and joint angle during dynamic muscle contraction. By utilizing this platform, we measured five hemiplegia patients during walking and analyzed the characteristics of their muscle behaviors. The results suggested that the proposed multimodal signal acquisition and integration platform is capable of providing novel and complete information about in vivo muscle contraction. The proposed platform is a potentially useful tool for the assessment of hemiplegia patients in clinical applications.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130698276","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
Spectral factorization of z-domain polynomials using non-linear least-squares 使用非线性最小二乘的z域多项式的谱分解
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900705
T. Moir
{"title":"Spectral factorization of z-domain polynomials using non-linear least-squares","authors":"T. Moir","doi":"10.1109/ICDSP.2014.6900705","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900705","url":null,"abstract":"A new recursive method for spectral factorizing polynomials is given. The method uses non-linear least-squares. The method is simple to implement and has applications in many areas of adaptive filtering, system identification and control. The optimization method is not new but to date has not been applied to spectral factorization. Convergence is much faster than ordinary root finding algorithms. (superlinear versus quadratic).","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130329827","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
A pulse-Doppler processing scheme for quadrature compressive sampling radar 正交压缩采样雷达脉冲多普勒处理方案
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900750
Chao Liu, Feng Xi, Shengyao Chen, Zhong Liu
{"title":"A pulse-Doppler processing scheme for quadrature compressive sampling radar","authors":"Chao Liu, Feng Xi, Shengyao Chen, Zhong Liu","doi":"10.1109/ICDSP.2014.6900750","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900750","url":null,"abstract":"Quadrature compressive sampling (QuadCS) is a sub-Nyquist sampling system for acquiring inphase and quadrature (I/Q) components of radio-frequency signals. This paper discusses the application of the QuadCS system to pulse-Doppler radars and develops a compressive sampling pulse-Doppler (CoSaPD) processing scheme from the sub-Nyquist samples. The Doppler estimation is realized through spectrum analyzer as in classic processing. The detection is done on the Doppler bin data. The range estimation is performed through sparse recovery algorithms on the detected targets. Due to inherent detection property of the recovery algorithms, the detection threshold can be set at a low value and then the introduced false targets are removed in the range estimation stage. Simulation results show that the CoSaPD scheme with the data at one eighth the Nyquist rate and for SNR above -25dB can achieve performance of the classic processing with Nyquist samples.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556660","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
Multiple-parameter real discrete fractional Fourier and Hartley transforms 多参数实离散分数傅里叶变换和哈特利变换
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900753
W. Hsue, Wei-Ching Chang
{"title":"Multiple-parameter real discrete fractional Fourier and Hartley transforms","authors":"W. Hsue, Wei-Ching Chang","doi":"10.1109/ICDSP.2014.6900753","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900753","url":null,"abstract":"In this paper, two new real fractional transforms with many parameters are constructed. They are the real discrete fractional Fourier transform (RDFRFT) and the real discrete fractional Hartley transform (RDFRHT). The eigenvectors of these two new transforms are all random, and they both have only two distinct eigenvalues: 1 or -1. Real eigenvectors of both two transforms are constructed from random DFT-commuting matrices. We also propose an alternative definition of RDFRHT based on a diagonal-like matrix. All of the proposed new transforms have required good properties to be fractional transforms. Finally, since outputs of proposed new transforms are random, they can be applied in image encryptions.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133743913","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: 9
Automatic shot boundary detection algorithm using structure-aware histogram metric 基于结构感知直方图度量的镜头边界自动检测算法
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900724
Tianhao Liu, S. Chan
{"title":"Automatic shot boundary detection algorithm using structure-aware histogram metric","authors":"Tianhao Liu, S. Chan","doi":"10.1109/ICDSP.2014.6900724","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900724","url":null,"abstract":"This paper proposes a shot boundary detection algorithm based on a novel structure-aware histogram dissimilarity measure. In the proposed approach, local histogram feature is employed to capture spatial information for comprehensive visual variations including illumination, color and motions. To improve the reliability of histogram feature in differentiating motion related shot transitions, the structural similarity measure is involved to help suppress the motion sensitivity and hence minimize false detection rate due to transition disturbances. Therefore, the proposed combination of local histogram feature and structural similarity measure offers a more robust framework to correctly evaluate frame discontinuities. Moreover, in order to ensure good performances in detecting both cut changes and gradual transitions, we propose an adaptive dual-thresholding scheme which addresses both global statistics and local variations of the frame discontinuities. Experimental results evaluated with challenging testing videos show that the proposed method achieves better overall performances than other conventional algorithms.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133264294","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: 10
A research on mouth expression animation based on compliant spatial mechanisms model 基于柔顺空间机制模型的嘴巴表情动画研究
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900837
Jianjian Wu, Guoyun Lv, Yangyu Fan
{"title":"A research on mouth expression animation based on compliant spatial mechanisms model","authors":"Jianjian Wu, Guoyun Lv, Yangyu Fan","doi":"10.1109/ICDSP.2014.6900837","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900837","url":null,"abstract":"Realistic mouth animation plays a very important role in facial expressions. This paper proposes a novel 3D human mouth animation model by introducing compliant spatial mechanisms. This method integrates the features of both the traditional muscle model and compliant spatial mechanisms model. Based on mouth movement characteristics, compliant spatial mechanisms model is used to simulate the movements of mouth opening and closing, and the muscle model is used to control the parts of orbicularis oris, risorius and so on. Simulation experiments show that this method can describe the physical movement of mouth opening and closing, therefore, realistic and natural mouth expression animation can be obtained.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122190130","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
Detection model of luster effect in binocular rivalry 双目竞争中光泽效应的检测模型
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900791
Wenhao Hong, Yin Zhao, Lu Yu, Ce Zhu
{"title":"Detection model of luster effect in binocular rivalry","authors":"Wenhao Hong, Yin Zhao, Lu Yu, Ce Zhu","doi":"10.1109/ICDSP.2014.6900791","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900791","url":null,"abstract":"Binocular rivalry occurs when dichoptic images presented to the two eyes are too dissimilar to be fused. The two images may be perceived alternately. Dichoptic images with luminance discrepancy may appear as a fluctuating silver sheen. The effect is called binocular luster which is a special type of binocular rivalry. Corresponding regions in stereoscopic images with luminance discrepancy may introduce binocular luster. In this paper, our work focuses on the detection model of binocular luster. A psychophysical experiment was conducted to detect the binocular luster thresholds due to binocular luminance discrepancy in different binocular disparities. The luster effect could be introduced into stereoscopic images based on the detection model. In this way, a fluctuating shine effect could be perceived on 3D displays.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114973114","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: 4
Line scratch detection using Spatio-Temporal regularity flow vectors 基于时空规则流向量的线划痕检测
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900675
Rupesh Kumar, Sumana Gupta, K. Venkatesh
{"title":"Line scratch detection using Spatio-Temporal regularity flow vectors","authors":"Rupesh Kumar, Sumana Gupta, K. Venkatesh","doi":"10.1109/ICDSP.2014.6900675","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900675","url":null,"abstract":"Vertical and horizontal line scratches are primarily defects in old video data recorded on film. The flawless restoration of scratches is totally dependent on their perfect detection. False and missed detection weakens the restoration result. In this paper we address the problem of detection of primary and secondary line scratches and also propose a solution for false and missed detection. The problem of simultaneous detection of both dark and bright intensity scratch is also solved by proposed method. The proposed detection method is based on selecting non-traditional TY and TX frames rather than the traditional XY frames of a video. Unlike prior detection techniques that are based on frame by frame processing of XY frames, the proposed method of detection uses a video cube consisting of a group of TY or TX frames and exploits the Spatio-Temporal feature called the regularity flow in a cube. The regular flow of a pixel in a cube indicates the absence of a scratch while irregularity in the flow indicates the presence of a scratch. Experimental results show that the proposed method has no false detection for line scratches of width 1 to 10 pixel.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122901264","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
Color Rabbit: Guiding the distance of local maximums in illumination estimation 色兔:在照明估计中引导局部最大值的距离
2014 19th International Conference on Digital Signal Processing Pub Date : 2014-09-18 DOI: 10.1109/ICDSP.2014.6900684
Nikola Banić, S. Lončarić
{"title":"Color Rabbit: Guiding the distance of local maximums in illumination estimation","authors":"Nikola Banić, S. Lončarić","doi":"10.1109/ICDSP.2014.6900684","DOIUrl":"https://doi.org/10.1109/ICDSP.2014.6900684","url":null,"abstract":"In this paper the Color Rabbit (CR), a new low-level statistics-based color constancy algorithm for illumination estimation is proposed and tested. Based on the Color Sparrow (CS) algorithm it combines multiple local illumination estimations found by using a new approach into a global one. The algorithm is tested on several publicly available color constancy databases and it outperforms almost all other color constancy algorithms in terms of accuracy and execution speed.","PeriodicalId":301856,"journal":{"name":"2014 19th International Conference on Digital Signal Processing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123599701","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: 24
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