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2015 International Conference on Signal Processing and Communication Engineering Systems最新文献

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Medical image watermarking with DWT-BAT algorithm 基于DWT-BAT算法的医学图像水印
P. Kishore, S. Kishore, E. K. Kumar, K. Kumar, P. Aparna
Medical images communicate imperative information to the doctors about a patient's health situation. Internet broadcasts these medical images to inaccessible sites of the globe which are inspected by specialist doctors. But data transmissions through unsecured web invoke validation problems for any image data. Medical images that are transmitted through the internet must be watermarked with patient pictures for substantiation by the doctors to ascertain the medical image. Watermarking medical images necessitate attentive adjustments to protect the information in the medical images with patient image watermarks. The medical images are used as an envelope image in the watermarking process which is visible on the network. These envelope medical images are watermarked with patient images in wavelet domain there by using the BAT algorithm form optimizing the embedding process for peak signal to noise ratio (psnr) and normalized cross correlation coefficient (ncc) values. The medical image envelope and letter inside envelope i.e. watermark image are transformed into wavelet domain and are mixed using scaling factor alpha which is termed as embedding strength. BAT algorithm is an optimization algorithm specialized in optimizing the values of peak-signal-to-noise ratio for a particular value of alpha, the embedding watermark strength. Finally these watermarked medical images are put on the network along with the secret key that will be used for extraction. At the receiving the embedded watermark is extracted using 2DWT using the embedding strength value using BAT algorithm. The robustness of the proposed watermarking techniques is tested with various attacks on the watermarked medical images. Peak-Signal-to-Noise ratios and Normalized cross correlation coefficients are computed to accesses the quality of the watermarked medical images and extracted patient images. The results are produced for three types of medical images with one patient image watermarks using single key by using four wavelets (haar, db, symlets, bior) at four different levels.
医学图像向医生传达有关病人健康状况的重要信息。互联网将这些医学图像广播到全球无法进入的地点,由专科医生检查。但是,通过不安全的网络传输数据会引发任何图像数据的验证问题。通过互联网传输的医学图像必须加上患者图片的水印,以供医生证实,以确定医学图像。医学图像水印需要仔细调整,以保护带有患者图像水印的医学图像中的信息。在水印过程中,医学图像作为包络图像,在网络上可见。采用BAT算法对这些包络医学图像进行小波域患者图像的水印处理,优化峰值信噪比(psnr)和归一化互相关系数(ncc)值的嵌入过程。将医学图像的包络和包络内的字母即水印图像变换到小波域,并使用称为嵌入强度的尺度因子alpha进行混合。BAT算法是一种针对嵌入水印强度alpha值的特定值,对峰值信噪比值进行优化的优化算法。最后将这些带水印的医学图像连同用于提取的密钥一起放到网络上。在接收端,利用BAT算法对嵌入强度值进行2DWT提取嵌入水印。通过对加水印医学图像的各种攻击,验证了所提水印技术的鲁棒性。通过计算峰值信噪比和归一化互相关系数来获取水印医学图像的质量,提取出患者图像。利用4个不同级别的小波(haar、db、symlets、bior)对3种类型的医学图像进行单键水印分析。
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引用次数: 11
Speckle noise reduction in 3D ultrasound images — A review 三维超声图像中的斑点噪声降低-综述
C. Rekha, K. Manjunathachari, G. Rao
In image processing noise removal is the strenuous tasks. Noise removal forms one of the applications of segmentation. It is also the basic tool for the medical diagnosis. It helps the medical practitioner to extract the defected organ easily and give a proper diagnosis. The present scenario is to concentrate on extracting the desired tissue from the noisy image obtained through ultrasound scanning methods. Ultrasound images are the predominantly used scanning approaches because of their low-cost and non-invasive nature. Elimination of the speckle from ultrasound is the demanding aspect. This paper focuses on various researches on speckle removal in ultrasound images. Emphasis is made on which method best removes the speckle noise by measuring various parameters such as signal to noise ratio, efficiency, etc,. In this paper it is also proposed to use a well-defined and well framed approach to reduce speckle noise in ultrasound images and improve signal to noise ratio of the obtained image compared to existing methods.
在图像处理中,去噪是一项艰巨的任务。噪声去除是分割的应用之一。它也是医学诊断的基本工具。它有助于医生容易地取出有缺陷的器官并作出正确的诊断。目前的场景是集中在提取所需的组织从噪声图像通过超声扫描方法获得。超声图像是主要使用的扫描方法,因为其低成本和非侵入性。从超声波中消除斑点是一个要求很高的方面。本文重点介绍了超声图像中斑点去除的各种研究。通过对信噪比、效率等参数的测量,重点讨论了哪一种方法能较好地去除散斑噪声。本文还提出了一种定义良好、框架良好的方法来降低超声图像中的斑点噪声,与现有方法相比,提高图像的信噪比。
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引用次数: 9
FPGA based non-invasive heart rate monitoring system for detecting abnormalities in Fetal 基于FPGA的胎儿无创心率监测系统
R. Rasu, P. S. Sundaram, N. Santhiyakumari
The aim of this paper is to extract the Fetal Electrocardiogram (FECG) signal from the mother's abdomen signal which is an important signal to analyze the abnormalities of the fetal heart by a physician. Fetal ECG is extracted from the mother's abdomen by using least-mean-square (LMS) adaptive filter based on the FIR filter coefficients. This FECG is used to calculate the fetal heart beat and the period of the signal based on our estimation. By using this system FECG can be taken after the pregnancy of 20 weeks. To take FECG in real time, maternal woman should wear a wide belt around her abdomen which is fitted with several ECG electrodes. The data collected from the electrodes are sent to a system and then analyzed with the help of adaptive noise canceller algorithm, which is used to separate the signals. This separation is here done based on predefined values by using the Lab VIEW tool. And also the FIR filter has been designed and simulated using Xilinx ISE 12.1 and implemented in Spartan 3 Family FPGA.
本文的目的是从母体腹部信号中提取胎儿心电图(FECG)信号,这是医生分析胎儿心脏异常的重要信号。采用基于FIR滤波系数的最小均方自适应滤波方法从母体腹部提取胎儿心电图。该FECG用于计算胎儿心跳和信号周期,基于我们的估计。使用该系统可在妊娠20周后进行FECG检测。为了实时测量脑电图,孕妇应该在腹部系上一条宽腰带,腰带上装有几个心电图电极。从电极收集的数据被发送到一个系统,然后借助自适应噪声消除算法进行分析,该算法用于分离信号。这种分离是通过使用Lab VIEW工具基于预定义的值来完成的。利用Xilinx ISE 12.1对FIR滤波器进行了设计和仿真,并在Spartan 3系列FPGA上实现。
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引用次数: 13
Modeling of human thorax and study on human heart activity with UWB radar from UHF to S-band 超高频到s波段超宽带雷达人体胸腔建模及心脏活动研究
K. Sahu, M. Satyam, C. D. Naidu, K. J. Sankar
This paper presents an electromagnetic wave propagation model of a human thorax and also an estimation of the propagation characteristics of the model for frequencies ranging from UHF to S-band. As the heart size varies in a cardiac cycle, the characteristic variation of the propagation parameters such as reflection coefficient, signal attenuation etc., which depend on the wave propagation distances and frequency dependent dielectric properties of human body tissues are calculated. This is performed using the analytical impedance transformation method to account for the effect of multiple reflections. This estimation will be useful for the frequency dependent power budget analysis in the design of an ultra-wideband radar based contactless, non-invasive diagnostic tool for study of human cardiac activity.
本文提出了人体胸腔的电磁波传播模型,并对该模型在UHF至s波段的传播特性进行了估计。随着心脏大小在一个心动周期内的变化,计算了反射系数、信号衰减等传播参数的特征变化,这些参数取决于波的传播距离和人体组织的频率相关介电特性。这是使用分析阻抗变换方法来解释多重反射的影响。该估计将有助于设计基于超宽带雷达的非接触式非侵入性诊断工具,用于研究人类心脏活动。
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引用次数: 3
Performance of CT metastases and compare their results with others CT转移的表现,并与其他结果进行比较
A. Krishan, D. Mittal
Classification of normal liver and different types of tumors in the liver by using Computed Tomography (CT) imaging technique. The processing of image enhancement is done by using Contrast limited adaptive histogram equalization (CLAHE) algorithm. That enhanced images have a different view look for normal liver and both tumors. A number of parameters evaluations for the comparison between both types of tumors and to get the level of tumors. A desired better range of parameters work has a small spam in the values of the range. Large amount of input image data in one particular record work for better response.
利用计算机断层扫描(CT)成像技术对正常肝脏和不同类型肝脏肿瘤进行分类。采用对比度限制自适应直方图均衡(CLAHE)算法对图像进行增强处理。增强图像对正常肝脏和两种肿瘤有不同的观察视角。若干参数的评价用于两种肿瘤类型之间的比较,从而得出肿瘤的水平。理想的更好的参数工作范围在范围的值中有一个小的垃圾。在一个特定的记录中输入大量的图像数据,以获得更好的响应。
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引用次数: 0
A pragmatic approach for detecting liver cancer using image processing and data mining techniques 一种使用图像处理和数据挖掘技术检测肝癌的实用方法
P. Anisha, C. K. K. Reddy, L V Narasimha Prasad
Cancer diagnosis and treatment has a great significance due to the prevalent episodes of the diseases, high death rate and reappearance after treatment. On the world scale, cancer stands in the fifth position which causes death. Among the various cancers, liver cancer stands in the third position. Liver cancer is generally diagnosed by three different test like blood test, image test and biopsy. To make the task of detecting the liver cancer simpler, less time consuming, an effective and efficient approach is adopted for the same. In this research a computer aided diagnostic system for detecting liver cancer is put forward. The proposed detection methodology makes use of MRI, CT and USG scan imagery. K-means clustering technique is adopted so as to segment the images in order to capture the region of interest. Later, Haar wavelet transform is considered to compute the threshold values for the region of interest. The experiment put forth gave an average accuracy of 82% besides reducing the time complexity and computational complexity of the test.
肿瘤发病率高、死亡率高、治疗后复发率高,对肿瘤的诊断和治疗具有重要意义。在世界范围内,癌症排在导致死亡的第五位。在各种癌症中,肝癌排名第三。肝癌的诊断通常通过三种不同的检查,如血液检查、图像检查和活检。为了使肝癌的检测工作更简单,更省时,采用了一种有效的方法。本研究提出了一种肝癌计算机辅助诊断系统。提出的检测方法利用MRI, CT和USG扫描图像。采用K-means聚类技术对图像进行分割,以捕获感兴趣的区域。然后利用Haar小波变换计算感兴趣区域的阈值。该实验在降低测试时间复杂度和计算复杂度的基础上,平均准确率达到82%。
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引用次数: 29
A review report on low power VLSI systems analysis and modeling techniques 低功耗VLSI系统分析与建模技术综述报告
S. R. S. Klavakolanu, M. Raju, Fazal Noorbasha, B. Kanth
In the present trend of CMOS IC technology, Low Power Design is a major issue in designing of a system. In order to achieve that criterion, power consumption should be minimized. In this paper, techniques which are available for reduction of power consumption at different abstraction levels are discussed in detail. With this paper, Designer can easily choose the proper methodology with the appropriate optimization technique to achieve the required goal.
在当前CMOS集成电路技术的发展趋势下,低功耗设计是系统设计中的一个主要问题。为了达到这个标准,应该尽量减少功耗。本文详细讨论了在不同抽象层次上降低功耗的技术。通过本文,设计人员可以很容易地选择合适的方法和合适的优化技术来实现所需的目标。
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引用次数: 5
Real-time issues in embedded system design 嵌入式系统设计中的实时性问题
K. Prashanth, P. Akram, T. A. Reddy
The Embedded system is controlled with the combination of hardware and software. They are usually processed by a microprocessor / microcontroller that execute instructions which are present in ROM. The term "embedded" reflects to the fact that they are part of the system. Real-Time Operating System (RTOS) combines with two thoughts "real-time" and "operating system". These are the operating system where the performance is based on the logical result and the time at which the results are obtained. The operating system called as RTOS running real time applications provide the result of course in the required time frame. The working procedure is almost the same as normal operating system, but also offers to allow the real time scheduling tasks. The RTOS is not going to increase the speed of execution, but it is accurate than the general OS.
嵌入式系统采用硬件和软件相结合的方式进行控制。它们通常由执行存在于ROM中的指令的微处理器/微控制器处理。术语“嵌入式”反映了它们是系统的一部分这一事实。实时操作系统(RTOS)结合了“实时”和“操作系统”两个思想。在这些操作系统中,性能取决于逻辑结果和获得结果的时间。运行实时应用程序的操作系统称为RTOS,当然在所需的时间框架内提供结果。其工作过程与普通操作系统几乎相同,但也提供了允许实时调度任务的功能。RTOS不会提高执行速度,但它比一般的操作系统更精确。
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引用次数: 7
Aperture coupled feed circularly polarized antenna 孔径耦合馈电圆极化天线
Vinay Balusa, V. P. Pavan Kumar, B. Madhav
Aperture-coupled microstrip line feed circularly polarized patch antenna is designed and its performance characteristics are observed by changing its feed orientations. The perfect impedance matching and appreciable axial ratio bandwidths are achieved from the current model. The complete analysis is done by changing feed line orientations and by placing special slots on the ground element. The antenna compactness can be achieved by placing shorting pin at appropriate location on the axis of feed line. Antenna output parameters are computed with finite element method based simulation. A microstrip line patch antenna is designed which is a circular microstrip line coupling through four Γ-shaped slots to generate four sequentially phased sources to excite the single layer patch antenna.
设计了孔径耦合微带线馈电圆极化贴片天线,并通过改变馈电方向观察了其性能特性。该模型具有良好的阻抗匹配和可观的轴比带宽。通过改变馈线方向和在接地元件上放置特殊槽来完成完整的分析。通过在馈线轴线上的适当位置放置短针,可以实现天线的紧凑性。在仿真的基础上,采用有限元法计算天线输出参数。设计了一种微带线贴片天线,采用环形微带线通过4个Γ-shaped槽耦合产生4个顺序相控源来激励单层贴片天线。
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引用次数: 3
Robust and novel blind watermarking scheme for H.264 compressed video 基于H.264压缩视频的鲁棒盲水印算法
A. U. Wagdarikar, R. K. Senapati
The main aim of this paper is to design and implement robust and novel watermarking scheme for H.264 encoded videos. The method used for watermarking is multi resolution wavelet decomposition. The watermark used is a binary image. This watermark is embedded in the wavelet coefficients of the LH, HL and HH sub-bands of the third wavelet decomposition level by quantization. We have tested the resilience of the watermarking algorithm against series of different attacks for different H.264 compressed videos. The results shows embedded watermark is invisible and robust to attacks.
本文的主要目的是设计和实现H.264编码视频的鲁棒和新颖的水印方案。用于水印的方法是多分辨率小波分解。所使用的水印是二值图像。该水印通过量化嵌入到第三小波分解层LH、HL、HH子带的小波系数中。针对不同的H.264压缩视频,我们测试了水印算法对一系列不同攻击的弹性。结果表明,所嵌入的水印具有不可见性和抗攻击能力。
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引用次数: 5
期刊
2015 International Conference on Signal Processing and Communication Engineering Systems
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