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2022 30th Signal Processing and Communications Applications Conference (SIU)最新文献

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Hyperspectral Anomaly Detection with Multivariate Skewed t Background Model 基于多元倾斜t背景模型的高光谱异常检测
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864954
K. Kayabol, Ensar Burak Aytekin, Sertaç Arisoy, E. Kuruoğlu
In this paper, autoencoder-based multivariate skewed t-distribution is proposed for hyperspectral anomaly detection. In the proposed method, the reconstruction error between the hyperspectral images reconstructed by the autoencoder and the original hyperspectral images is calculated and is modeled with a multivariate skewed t-distribution. The parameters of the distribution are estimated using the variational Bayes approach, and a distribution-based rule is determined for anomaly detection. The experimental results show that the proposed method has better performance when compared to the RX, LRASR and DAEAD anomaly detection methods.
本文提出了一种基于自编码器的多元偏态t分布的高光谱异常检测方法。该方法计算了自编码器重建的高光谱图像与原始高光谱图像之间的重构误差,并采用多元偏态t分布建模。利用变分贝叶斯方法估计分布参数,确定基于分布的异常检测规则。实验结果表明,与RX、LRASR和DAEAD异常检测方法相比,该方法具有更好的检测性能。
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引用次数: 0
Brain Tumor Classification Using MRI Images and Convolutional Neural Networks 利用MRI图像和卷积神经网络进行脑肿瘤分类
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864962
Muhammad Adeel Hafeez, C. Kayasandik, Merve Yusra Dogan
The brain tumor has become one of the most prominent types of cancers affecting a huge population across the globe every year. It has the lowest life expectancy rate and the risk of death is highly associated with the type, shape, and location of the tumor. The Magnetic Resonance Imaging (MRI) is a strong tool to detect different brain lesions and is extensively used by radiologists and physicians. For the early and accurate diagnosis of the brain tumor using MRI, it is important to consider automated computer-assisted diagnosis which is more flexible and efficient. In this paper, we have proposed a Convolutional Neural Network (CNN) based approach for the classification of three types of brain tumors (meningiomas, gliomas, and pituitary tumors). A publicly available dataset that contains 3064 T1-weighted brain CE-MRI images collected from 233 patients has been used in the study. We propose a 15 layers CNN model for the classification of three types of brain tumors from the mentioned dataset. We obtained an accuracy, precision, recall, and f1-score of 98.6%, 99%, 98.3%, and 98.6% from our proposed model which is higher than previously reported results.
脑肿瘤已经成为每年影响全球大量人口的最突出的癌症类型之一。它的预期寿命最低,死亡风险与肿瘤的类型、形状和位置高度相关。磁共振成像(MRI)是一种检测不同脑病变的强大工具,被放射科医生和内科医生广泛使用。为了使MRI对脑肿瘤的早期准确诊断,考虑更灵活、更高效的计算机辅助自动诊断是很重要的。在本文中,我们提出了一种基于卷积神经网络(CNN)的方法来分类三种脑肿瘤(脑膜瘤、胶质瘤和垂体瘤)。该研究使用了一个公开可用的数据集,该数据集包含来自233名患者的3064张t1加权脑CE-MRI图像。我们提出了一个15层CNN模型,用于从上述数据集中对三种类型的脑肿瘤进行分类。我们从我们提出的模型中获得了98.6%,99%,98.3%和98.6%的准确率,精密度,召回率和f1得分,高于之前报道的结果。
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引用次数: 1
Investigation of Appropriate Classification Method for EOG Based Human Computer Interface 基于EOG人机界面的分类方法研究
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864953
Muna Layth Abdulateef Al-Zubaidi, Selim Aras
The reason why real feelings and mood changes can be seen through our eyes is that the eyes provide the most revealing and accurate information of all human communication signs. It is possible to control a human-computer interface by voluntarily moving the eyes, which have an important place in communication. In this study, the appropriate feature and classification methods were investigated to use the Electooculography signs obtained from seven different voluntary eye movements in the human-computer interface. The success of the system is increased by determining the combination that gives the best result from many features by using the sequential forward feature selection method. The developed method reached 93.9% success in the seven-class dataset. The results show that human-computer interface control can be done with high accuracy with voluntary eye movements. Also, the development of a real-time working model is inspiring for work.
我们的眼睛之所以能看到真实的感情和情绪变化,是因为眼睛提供了人类所有交流符号中最具启发性和最准确的信息。通过主动移动眼睛来控制人机界面是可能的,眼睛在交流中起着重要的作用。在本研究中,利用人机界面中7种不同的自愿眼动所获得的电图符号,探讨了相应的特征和分类方法。采用顺序前向特征选择方法,从众多特征中选择出最优的组合,提高了系统的成功率。该方法在7类数据集上的成功率为93.9%。结果表明,该人机界面控制方法可以实现高精度的眼动控制。此外,实时工作模型的开发对工作也很有启发作用。
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引用次数: 1
Implementation of a SoC by Using lowRISC Architecture on an FPGA for Image Filtering Applications 基于低risc架构的图像滤波SoC的FPGA实现
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864960
Latif Akçay, Bartu Sürer, B. Yalçin
In this study, it is aimed to implement the low-RISC system-on-chip, which is based on the Rocket processor created with the RISC-V instruction set architecture developed by Berkeley University, on FPGA and to run image processing algorithms on this system. While making this implementation, the main target is a system that is very simple, consumes low power, and can be quickly redirected to other purposes. Therefore, it is based on the effective evaluation of the existing system without using any extra customized accelerators. Thus, a free, open source, and powerful enough platform for many embedded system applications is proposed to the designers. For this purpose, a lane detection application designed with standard C libraries such as Gaussian blur filter, Sobel operation filter and other elements, which are widely used in image processing applications, is run with embedded Linux operating system and the results are shared.
本研究以美国伯克利大学开发的RISC-V指令集架构的Rocket处理器为基础,在FPGA上实现低risc的片上系统,并在该系统上运行图像处理算法。在进行此实现时,主要目标是一个非常简单,消耗低功耗并且可以快速重定向到其他目的的系统。因此,它是基于对现有系统的有效评估,而不使用任何额外的定制加速器。因此,为许多嵌入式系统应用程序提供了一个免费、开源和足够强大的平台。为此,利用图像处理应用中广泛使用的标准C库如高斯模糊滤波器、索贝尔运算滤波器等元素设计了一个车道检测应用程序,并在嵌入式Linux操作系统上运行,并共享结果。
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引用次数: 0
Comparison of Far Field and Near Field Values of Skin Tissue Measured Using Microstrip Antenna Structure 微带天线结构测量皮肤组织远场和近场值的比较
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864827
Rabia Toprak, S. S. Gültekin, D. Uzer
Pathology science has an important place in the medical field. Its importance is increasing day by day because it evaluates the information about diseases at the cellular level. The reports prepared from the tissue samples examined by the pathologists contain very important information for both the patient and the doctor. This information may include the level of the disease and the mode of treatment. Therefore, the time to reach the pathological reports is important. Microstrip patch antennas are used for various purposes in the biomedical field. In this study, the far and near field outputs of the evaluations of the pathological tissue samples were tested with the microstrip patch antenna structure. For this, a microstrip patch antenna with an operating frequency of 2.45 GHz was used. Pathological tissue samples were modeled in the free-space measurement technique created using the antenna structure. The electric field and scattering parameter values obtained as a result of the simulations using the Ansys HFSS program were evaluated for the near and far field. When the evaluation results are examined, it has been shown that near field measurements for electric field data and far field measurements for scattering parameter data are more efficient.
病理学在医学领域占有重要地位。它的重要性与日俱增,因为它在细胞水平上评估有关疾病的信息。病理学家从组织样本中提取的报告包含了对病人和医生都非常重要的信息。这些信息可能包括疾病的程度和治疗方式。因此,到达病理报告的时间很重要。微带贴片天线在生物医学领域有着广泛的应用。本研究采用微带贴片天线结构对病理组织样本的远场和近场输出进行评估。为此,采用工作频率为2.45 GHz的微带贴片天线。利用天线结构建立的自由空间测量技术对病理组织样本进行建模。利用Ansys HFSS程序进行了模拟,得到了近场和远场的电场和散射参数值。评价结果表明,电场数据的近场测量和散射参数数据的远场测量效率更高。
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引用次数: 0
Bit Error Rate Performance of MIMO-NOMA with Majority Based TAS/MRC Scheme in Nakagami-m Fading Channels 基于多数TAS/MRC方案的MIMO-NOMA在Nakagami-m衰落信道中的误码率性能
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864766
Princewill Kum Kumson, Rusul Al-Afah Russ, Mahmoud Aldababsa
The inability of conventional orthogonal multiple access (OMA) techniques to guarantee a low latency rate, high spectral efficiency, massive device connectivity, and a better quality of service (QoS) led to the introduction of the non-orthogonal multiple access (NOMA) technique. Multiple-input multiple-output (MIMO) technologies can increase the capacity and decrease the error rate of wireless systems. Due to the advantages mentioned earlier, integrating NOMA and MIMO is indispensable in future wireless communication systems. In this context, this paper considers MIMO-NOMA networks, in which all nodes are equipped with multiple antennas. In the considered network, the majority-based transmit antenna selection and maximal ratio combining schemes are employed at the base station and users, respectively. Then, the bit error rate performance is investigated over Nakagami-m fading channels by Monte Carlo simulations.
传统的正交多址(OMA)技术无法保证低延迟率、高频谱效率、大量设备连接和更好的服务质量(QoS),这导致了非正交多址(NOMA)技术的引入。多输入多输出(MIMO)技术可以提高无线系统的容量,降低误码率。由于前面提到的优点,在未来的无线通信系统中集成NOMA和MIMO是必不可少的。在这种情况下,本文考虑MIMO-NOMA网络,其中所有节点都配备了多个天线。在考虑的网络中,基站和用户分别采用基于多数的发射天线选择和最大比值组合方案。然后,通过蒙特卡罗仿真研究了在Nakagami-m衰落信道下的误码率性能。
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引用次数: 2
A Global Approach for Goal-Driven Pruning of Object Recognition Networks 目标识别网络目标驱动剪枝的全局方法
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864720
Mehmet Z. Akpolat, Abdullah Bülbül
Pruning methods for neural network models are important for devices with performance and storage problems. Recently, unlike traditional pruning methods, The Goal Driven Pruning method has been proposed. This approach, inspired by the attention mechanism in humans, is based on decreasing the sensitivity to the features of distractors in the environment. For this purpose, in this method, pruning is performed not only in the middle layers, but also in the output layers for the task irrelevant classes. In this study, we present Global Goal-driven Pruning, which, unlike Goal-driven Pruning, prunes by evaluating the model as a whole, instead of layer-based pruning. The effectiveness of the proposed model has been demonstrated by the tests.
神经网络模型的剪枝方法对于具有性能和存储问题的设备非常重要。近年来,不同于传统的修剪方法,目标驱动修剪方法被提出。这种方法受人类注意力机制的启发,基于降低对环境中干扰物特征的敏感性。为此,在该方法中,不仅在中间层执行剪枝,而且在与任务无关的类的输出层执行剪枝。在本研究中,我们提出了全局目标驱动修剪,与目标驱动修剪不同,它通过整体评估模型来修剪,而不是基于层的修剪。通过试验验证了该模型的有效性。
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引用次数: 0
Face Frontalization for Image Set Based Face Recognition 基于图像集的人脸识别的人脸正面化
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864911
Golara Ghorban Dordinejad, Hakan Cevikalp
Image set based face recognition has recently become a popular topic as it has better performance than single image based face recognition. However, preprocessing is needed to remove the effects of some adverse conditions such as different pose angles, illumination, and expression differences within the set. One of the most effective preprocessing to improve the face recognition rate is face frontalization. Face frontalization is defined as the artificial acquisition of a face image with a different pose angle to a frontal pose. It has been observed that this process increases the face recognition performance. In this paper, image set based face recognition was performed by applying face frontalization to all images in the sets. Firstly, the faces in the IJBA database were frontalized by using the Rotate and Render hybrid frontalization method, which is based on a Three-Dimensional and Generative Adversial Network. Then, discriminative convex classifier is used for set based face recognition. In face recognition experiments, when the frontalized IJBA database and its non-frontalized version were compared, it was observed that the accuracy of face recognition increased with the frontalized face images.
基于图像集的人脸识别由于具有比单图像人脸识别更好的性能而成为近年来的热门话题。但是,需要进行预处理,以消除一些不利条件的影响,例如不同的姿势角度,光照,以及集合内的表情差异。提高人脸识别率最有效的预处理方法之一是人脸正面化。人脸正面化被定义为人工获取与人脸正面姿态角度不同的人脸图像。据观察,这一过程提高了人脸识别性能。本文通过对集合中的所有图像进行人脸正面化,实现基于图像集的人脸识别。首先,采用基于三维生成对抗网络的旋转与渲染混合正面化方法对IJBA数据库中的人脸进行正面化;然后,将判别凸分类器用于基于集合的人脸识别。在人脸识别实验中,将经过正面处理的IJBA数据库与未经过正面处理的IJBA数据库进行对比,发现人脸识别的准确率随着正面处理的人脸图像的增加而提高。
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引用次数: 3
Color Image Enhancement Using A New Anisotropic Metric 一种新的各向异性度量的彩色图像增强
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864950
Haydar Kiliç, S. Ceyhan
In this study, a new anisotropic metric for color images was defined and the filtering results of a noisy image were examined. Unlike the others (Riemann), the metric created in filtering was chosen as Finsler type and mathematical inferences were made until the filter creation stage. The scale parameter beta and step size dt were tried for different images, and the parameters that gave the best results for the new metric were examined for this study. This new filter was compared with some known filters and the results were examined. As a result, the new filter provided the best image enhancement.
本文定义了一种新的彩色图像各向异性度量,并对噪声图像的滤波结果进行了检验。与其他(Riemann)不同,在过滤中创建的度量被选择为Finsler类型,直到过滤器创建阶段才进行数学推理。对不同的图像尝试了尺度参数beta和步长dt,并对新度量给出最佳结果的参数进行了研究。将该滤波器与一些已知的滤波器进行了比较,并对结果进行了检验。因此,新的过滤器提供了最好的图像增强。
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引用次数: 0
Effect of Resampling Methods to Performance of FastSLAM Under Different Noise Conditions 不同噪声条件下重采样方法对FastSLAM性能的影响
Pub Date : 2022-05-15 DOI: 10.1109/SIU55565.2022.9864934
Serhat Karaçam, T. S. Navruz
In this study, variation of estimation errors of resampling methods which is one of the most important steps of FastSLAM algorithm, in different process and measurement noise values under different particle numbers is examined. It is seen that variation of process noise affected error values more than variation of measurement noise for all resampling methods, and Metropolis resampling is the method least affected by variation of measurement noise. It has been determined that resampling method that provides the closest error value to the correct position changes according to the noise conditions in which the system operates.
本文研究了FastSLAM算法中最重要的步骤之一重采样方法的估计误差在不同过程和不同粒子数下测量噪声值下的变化。结果表明,在所有重采样方法中,过程噪声的变化对误差值的影响大于测量噪声的变化,而Metropolis重采样是受测量噪声影响最小的方法。已经确定,根据系统运行的噪声条件,提供最接近正确位置误差值的重采样方法会发生变化。
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引用次数: 0
期刊
2022 30th Signal Processing and Communications Applications Conference (SIU)
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