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2009 2nd International Congress on Image and Signal Processing最新文献

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A Combination of a New Five-Element JSF and Frobenius Map in Point Multiplication of ECC Over GF(2mn) GF(2mn)上ECC点乘法的新五元JSF与Frobenius映射组合
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5301338
Xianwen Yang, Zheng Li
Based on the existing researches of joint sparse form (JSF), a new five-element JSF is proposed in this paper. For every pair of integers with l binary representations length, it is proved that the average joint hamming weight of its new five- element JSF is 0.333l. Besides, Lee et al proposed a point multiplication algorithm of elliptic curve over GF(2 mn ) with 10≤m≤20, in which Frobenius map was used to expand the integer k and each coefficient of the expansion is represented as a binary string. In this paper, with the application of the new five- element JSF to the coefficients, some variations of Lee et al's algorithm are proposed, and it can achieve a better performance with a few more storages.
在现有联合稀疏形式研究的基础上,提出了一种新的五元联合稀疏形式。对于每一对二进制表示长度为1的整数,证明了其新型五元联合JSF的平均关节汉明权为0.3331 l。此外,Lee等人提出了GF(2 mn)上10≤m≤20的椭圆曲线的点乘法算法,该算法使用Frobenius映射展开整数k,并将展开的每个系数表示为二进制字符串。本文将新的五元JSF应用到系数中,对Lee等人的算法进行了一些改进,可以在增加少量存储的情况下获得更好的性能。
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引用次数: 0
Three Dimensional Deformation Measurements with Digital Holography 三维变形测量与数字全息
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5304345
Zhenjie Fan, Haojun Pang, Wensheng Wang, Chengda Ning, Fei Guo
Digital holography is a kind of optical information processing technology with digital method. It is a combination of traditional holography and modern electronic technology. By the way of recording and processing the holographic image by digital method, it is not adopted the traditional holographic photographic way of chemical processing, so that the processing is simplified. It is also convenient to improve the quality of the image and to extract the needed information by digital image processing. In this paper, charged coupled device (CCD) has been applied to holographic interferometry combined with electrical addressable liquid crystal display (EALCD), which adds new content and method to the development and application of holography. On the basis of theory analysis, a new method that combined image plane hologram with doubleexposure holographic interferometry, and combined CCD with EALCD is used in three dimensional deformation measurements. This method has been improved feasible by optical experiment. Keywords-digital holography; CCD; EALCD; deformation measurement; digital image processing; image plane holography
数字全息是一种采用数字方法的光学信息处理技术。它是传统全息术和现代电子技术的结合。通过数字方法对全息图像进行记录和处理,不采用传统的全息摄影方式进行化学处理,从而简化了处理过程。通过数字图像处理,也便于提高图像质量和提取所需信息。本文将电荷耦合器件(CCD)与电可寻址液晶显示器(EALCD)结合应用于全息干涉测量,为全息技术的发展和应用增添了新的内容和方法。在理论分析的基础上,提出了像平面全息与双曝光全息干涉相结合、CCD与EALCD相结合的三维变形测量方法。通过光学实验证明了该方法的可行性。Keywords-digital全息术;CCD;EALCD;变形测量;数字图像处理;成像平面全息术
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引用次数: 3
Discussion on the Construction of Optimal ZCZ Sequence Set 关于最优ZCZ序列集构造的讨论
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5301401
Yang-zhi Wang, Chengqian Xu, Xin Li
� � Abstract— In this paper, a new method for constructing zero correlation zone (ZCZ) sequence set is proposed. The proposed method can generate two kinds of ZCZ sequence sets. One is based on perfect sequence, the other is based on perfect sequence pair. Compared with previous methods, the proposed method only need an orthogonal matrix of order 2 or 3. The resulting sequence sets or sequence pair sets are optimal with respect to the theoretic bound.
摘要:本文提出了一种构造零相关带序列集的新方法。该方法可以生成两种ZCZ序列集。一种是基于完美序列,另一种是基于完美序列对。与以往的方法相比,该方法只需要一个2阶或3阶的正交矩阵。所得的序列集或序列对集相对于理论界是最优的。
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引用次数: 0
A Novel Data Association Approach of SLAM 一种新的SLAM数据关联方法
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5303588
Wen-jing Zeng, Tiedong Zhang, Yan Ma
A novel data association algorithm based on max-min ant system (MMAS) is proposed to solve the data associations of SLAM. By the advantages of MMAS in resolving the general assignment problem (GAP), the problem of data association was transformed into the problem of combination and optimization, and the ant colony algorithm was used to associate the measurements with features according to the joint compatible rule. At last, the presented algorithm was compared with other data association methods. The results obtained show the superiority of the presented method in data association of SLAM. It reduces computation cost efficiently on the condition of remaining certain correct associations, and it is an available method to deal with the problem on data association of SLAM.
针对SLAM数据关联问题,提出了一种基于最大最小系统(MMAS)的数据关联算法。利用MMAS在解决一般分配问题(GAP)方面的优势,将数据关联问题转化为组合优化问题,利用蚁群算法根据联合兼容规则将测量值与特征进行关联。最后,将该算法与其他数据关联方法进行了比较。实验结果表明了该方法在SLAM数据关联中的优越性。在保持一定正确关联的前提下,有效地降低了计算成本,是解决SLAM数据关联问题的一种有效方法。
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引用次数: 1
Noise Attenuation for Seismic Signal by Non-Linear Thresholding in Curvelet Domain 曲线域非线性阈值法抑制地震信号噪声
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5304631
Henglei Zhang, Tianyou Liu
Noise has traditionally been suppressed or eliminated in seismic data sets by the use of Fourier analysis filters and, to a lesser degree, nonlinear statistical filters. Although these methods are quite useful under specific conditions, they produce undesirable effects when denoising features of moderate to large amplitude and spatial extent, especially for the low S/N data. In this paper, a new method of de-noise in curvelet domain with non-linear thresholding is proposed: on the basis of curvelet multi-scale decomposition in good approximation of the curve variation characteristics, the author used non-linear threshold to address seismic data in curvelet domain. Through calculation of seismic data, we find out the method can suppress the random noise effectively while the effective wave can be maintained, the signal to noise ratio of the result is higher than the traditional method's. At the same time, it overcomes the drawback that the conventional filtering approach may affect the effective wave when suppressing noise.
传统上,通过使用傅立叶分析滤波器以及在较小程度上使用非线性统计滤波器来抑制或消除地震数据集中的噪声。虽然这些方法在特定条件下是非常有用的,但是对于中到大幅度和空间范围的特征去噪,特别是对于低信噪比的数据,会产生不良的效果。本文提出了一种新的曲线域非线性阈值去噪方法:在曲线域多尺度分解的基础上,利用非线性阈值对曲线域地震数据进行去噪。通过对地震资料的计算,发现该方法可以有效地抑制随机噪声,同时保持有效波,结果的信噪比高于传统方法。同时,克服了传统滤波方法在抑制噪声时影响有效波的缺点。
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引用次数: 3
Spectral Representations of Fingerprint Minutiae Subsets 指纹细节子集的谱表示
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5302445
Hai-yun Xu, R. Veldhuis
The investigation of the privacy protection of biometric templates gains more and more attention. The spectral minutiae representation is a novel method to represent a minutiae set as a fixed-length feature vector, which is invariant to translation, and in which rotation and scaling become translations, so that they can be easily compensated for. These characteristics enable the combination of fingerprint recognition systems with template protection schemes that require as an input a fixed-length feature vector. However, the limited overlap of a fingerprint pair can reduce the performance of the spectral minutiae representation algorithm. Therefore, in this paper, we introduce the spectral representations of fingerprint minutiae subsets to cope with the limited overlap problem. In the experiment, we improve the recognition performance from 0.32% to 0.12% in equal error rate after applying the spectral representations of minutiae subsets algorithm.
生物识别模板的隐私保护问题越来越受到人们的关注。谱细节表示是一种新颖的方法,它将细节集表示为固定长度的特征向量,该特征向量对平移是不变的,其中旋转和缩放成为平移,因此可以很容易地补偿它们。这些特征使指纹识别系统与模板保护方案相结合,需要作为输入固定长度的特征向量。然而,指纹对的有限重叠会降低频谱细节表示算法的性能。因此,本文引入指纹细节子集的谱表示来解决有限重叠问题。在实验中,我们在相同错误率的情况下,应用细节子集谱表示算法将识别性能从0.32%提高到0.12%。
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引用次数: 9
Application Research of Support Vector Machine in Multi-Spectra Remote Sensing Image Classification 支持向量机在多光谱遥感图像分类中的应用研究
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5305618
Yujian Wang, Jiazheng Yuan, Lili Fan, Zhiguo Liu
In order to improve the accuracy of multi-spectra remote sensing image classification, a terrain classification method based on support vector machine is proposed. A remote sensing image classification method based on SVM algorithm of C-SVC type is introduced and emphasis is put on the study of the improved SMO algorithm. In order to improve efficiency of classification, multiple-spectra remote sensing image classification of terrain is classified using fuzzy clustering based on fuzzy c-means algorithm which adopt semi-supervised improved algorithm. The experimental results show that the approach has an advantage over traditional classification methods.
为了提高多光谱遥感影像分类的精度,提出了一种基于支持向量机的地形分类方法。介绍了一种基于C-SVC型SVM算法的遥感图像分类方法,重点研究了改进的SMO算法。为了提高分类效率,采用基于半监督改进算法的模糊c均值算法对地形多光谱遥感影像进行模糊聚类分类。实验结果表明,该方法优于传统的分类方法。
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引用次数: 1
Analysis of Cortical Thickness Indicating Cingulate Gyrus and Temporal Gyrus Incrassation in Posttraumatic Stress Disorder Due to Mining Disaster 矿难创伤后应激障碍扣带回和颞回增加的皮质厚度分析
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5305444
Yijun Li, Junying Zhang, Hong Yin, Hongbing Lu
MRI studies in post-traumatic stress disorder (PTSD) have focused primarily on manual based hippocampal volumetry, which is located in the subcortical. However, the cortical reduction or increase caused especially by thickness changes has not been well investigated. Recent advances in computational analysis provide new opportunities to use fully automatic techniques to measure cortical thickness, along with a method called voxel-based morphometry that enables an exploration of structural changes throughout the brain by applying statistical parametric mapping (SPM) to high-resolution MRI. In this paper, Laplacian method was used to estimate cortical thickness and the thickness maps were analyzed by SPM5. Comparison was performed between 14 survivors of mining disaster with PTSD and 11 survivors of the same event without PTSD. The results indicate that in the cingulate gyrus and temporal gyrus, the cortical thickness of survivors with PTSD is larger than those without PTSD.
创伤后应激障碍(PTSD)的MRI研究主要集中在基于手工的海马体积测量,它位于皮层下。然而,皮层减少或增加,特别是厚度的变化引起的尚未得到很好的研究。计算分析的最新进展为使用全自动技术测量皮质厚度提供了新的机会,以及一种称为基于体素的形态测量法,通过将统计参数映射(SPM)应用于高分辨率MRI,可以探索整个大脑的结构变化。本文采用拉普拉斯方法估计脑皮层厚度,并利用SPM5对厚度图进行分析。对14例矿难合并PTSD幸存者与11例矿难未合并PTSD幸存者进行比较。结果表明,创伤后应激障碍幸存者的扣带回和颞回皮层厚度明显大于未患创伤后应激障碍者。
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引用次数: 0
Research of Double-Threshold Segmentation of Brazing-Area Defect of Saw Based on Otsu and HSV Color Space 基于Otsu和HSV颜色空间的锯片钎焊区缺陷双阈值分割研究
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5304160
Lin Lin Xiong, Zhong Wang, Xin Wang
Saws are important tools of cutting process in industrial production. However there are often wasters with surface defects due to processing technique, therefore the detection of surface defects of saws is crucial to the quality. This paper concerns the segmentation of brazing-area of saw. Considering real-time request of the detection, Otsu method which is simple and rapid was used. HSV color space which is similar to visual model was chosen. Gray space Otsu algorithm and color space double-threshold segmentation based on Otsu in paper (13) were compared with method combined H-S information in HSV color space with Otsu in this paper. The results show that the algorithm in this paper has a good effect and can meet real-time demand.
锯是工业生产中重要的切削加工工具。然而,由于加工工艺的原因,往往会产生表面缺陷的废料,因此锯材表面缺陷的检测对锯材的质量至关重要。本文研究了电锯钎焊区的分割问题。考虑到检测的实时性要求,采用了简单、快速的Otsu方法。选择与视觉模型相似的HSV色彩空间。将文献(13)中的灰度空间Otsu算法和基于Otsu的颜色空间双阈值分割与文献(13)中的HSV颜色空间H-S信息与Otsu相结合的方法进行比较。结果表明,本文提出的算法效果良好,能够满足实时性要求。
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引用次数: 5
A Thin Line Power Increase Stereo Matching Method Used in High-Precision Three-Dimensional Measurement 一种用于高精度三维测量的细线增功率立体匹配方法
Pub Date : 2009-10-30 DOI: 10.1109/CISP.2009.5303020
Limei Song, Long Wang
It's a difficult problem in three-dimensional visual measurement to improve the precision and accuracy of stereo matching. In this paper, a Thin Line Power Increase (TLPI) stereo matching method used in high-precision three- dimensional visual measurement is designed. It's a coding and stereo matching method which combines the second power increases method, the step moving method, the difference shadow method, the progressive decrease method and the stereo matching method. Through the combination of the second power increases method and the step moving method, the projectile optical information can cover all the measured object space. Through the difference shadow method, the background interference of the measured space can be wiped off. Through the progressive decrease method, the searching range of the optical information can be narrowed; the speed and the precision of optical information matching will be improved. Through the stereo matching method, the three-dimensional coordinate of object can be calculated. The Thin Line Power Increase method designed by this paper can solve the problem of misjudgment and improve the precision and reliability of three-dimensional measurement.
提高立体匹配的精度和准确度是三维视觉测量中的一个难题。本文设计了一种用于高精度三维视觉测量的TLPI (Thin Line Power Increase)立体匹配方法。它是一种结合二次幂增加法、阶跃移动法、差影法、逐级递减法和立体匹配法的编码和立体匹配方法。通过二次幂增加法和阶跃移动法的结合,使弹丸光学信息覆盖整个被测目标空间。通过差影法可以消除被测空间的背景干扰。通过逐级递减法,可以缩小光信息的搜索范围;提高了光信息匹配的速度和精度。通过立体匹配法,可以计算出物体的三维坐标。本文设计的细线功率增加方法可以解决三维测量的误判问题,提高三维测量的精度和可靠性。
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引用次数: 0
期刊
2009 2nd International Congress on Image and Signal Processing
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