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检索条件"主题词=change detection algorithms"

共 1588 条记录，以下是681-690 订阅

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Software Based Vision System for Automated Cell Injection

Software Based Vision System for Automated Cell Injection

引用

International Conference on BioMedical Engineering and Informatics (BMEI)

作者： Zhang Yi Tan KokKiong Sunan Huang National University of Singapore Singapore SG

Recent developments in nuclear reprogramming and intracytoplasmic sperm injection reflect an increasing need for more advanced and automatic micromanipulation technologies. In this paper, we present an automatic cell injection system, which is capable of visually monitoring the injecting process and controlling the microactuators. Traditionally, cell injection was manually operated. However, it was laborious, time consuming, of low accuracy, and prone to contamination due to the handling requirement. An automatic and efficient strategy is required to eliminate all these drawbacks. In our system, the whole injection process is monitored and controlled by software. The precision achieved is physically proven to be within a good tolerance range.

关键词： Software systems Machine vision Automatic control Control systems Robot vision systems Cameras change detection algorithms Microscopy Humans Robotics and automation

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Fast Search Algorithm for Short Video Clips from Large Video Database Using a Novel Histogram Feature

Fast Search Algorithm for Short Video Clips from Large Video...

引用

International Conference on Computational Intelligence for Modelling, Control and Automation, and International Conference on Intelligent Agents, Web Technologies and Internet Commerce

作者： Feifei Lee Koji Kotani Qiu Chen Tadahiro Ohmi New Industry Creation Hatchery Center University of Tohoku Japan Department of Electronics Graduate School of Engineering University of Tohoku Japan

In this paper, we present a novel fast video search algorithm for large video database. This algorithm is based on the adjacent pixel intensity difference quantization (APIDQ) algorithm, which had been reliably applied to human face recognition previously. An APIDQ histogram is utilized as the feature vector of the frame image. Combined with active search, a temporal pruning algorithm, fast and robust video search can be achieved. The proposed search algorithm has been evaluated by 6 hours of video to search for given 200 video clips which each length is 15 seconds. Experimental results show the proposed algorithm can detect the similar video clip in merely 80 ms, and is more accurately and robust against Gaussian noise than conventional fast video search algorithm.

关键词： Spatial databases Histograms Quantization Pixel Image databases Face recognition Humans change detection algorithms Feature extraction Search engines

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A Novel Algorithm for Background Updating and Target Tracking

A Novel Algorithm for Background Updating and Target Trackin...

引用

International Symposium on Computer Science and Computational Technology, ISCSCT

作者： Hui-zhong Zhuang Han Li Mechanical & Electrical Engineering Department Vocational Technical College Shanghai University Engineering of Science Shanghai China Electronic Information Department Physics and Electronic Information College Wenzhou University Wenzhou Zhejiang China

A novel algorithm of three-layer probability model based on synchronous detection lines is proposed to solve the problems of background updating and target tracking. Firstly, the state of each pixel point on the same synchronous detection line is judged in the probability model of pixel points. Secondly, the state of each synchronous detection line is estimated by maximum likelihood estimation so that the problem of background updating can be solved. Thirdly, the problem of target tracking is solved by the state distribution of the synchronous detection line. Finally, the coordination and shadow problems for multiple detection region groups are also discussed in this paper. The results of a practical system are shown that this algorithm has better effect to solve the problems of background updating and target tracking.

关键词： Target tracking Gaussian distribution Educational institutions Pixel Switches Data mining Motion detection Layout change detection algorithms Computer science

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Shot boundary detection in H.264

Shot boundary detection in H.264

引用

International International Symposium on Computer and Information Sciences (ISCIS)

作者： Sevtap Kustutan Aylin Kantarci Bilgisayar Mühendisliği Bölümü Ege Üniversitesi Izmir Turkey

This study focuses on improving the available scene change detection methods developed for bit streams compressed with the latest coding standard H.264/AVC. Two algorithms that form the basis of our study are introduced and compared. Then, a method based on the combination of the two methods is proposed together with some improvements. Experimental studies show the proposed method is superior to others.

关键词： Gunshot detection systems Codecs Video compression Layout Decoding Bit rate Transform coding Standards development Automatic voltage control change detection algorithms

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Digital Watermarking Algorithm for Print-and-Scan Process Used for Printed Matter Anti-counterfeit

Digital Watermarking Algorithm for Print-and-Scan Process Us...

引用

Congress on Image and Signal Processing, CISP

作者： Dongcheng Shi Qi Wang Chao Liang College of Computer Science and Engineering Changchun University of Technology Changchun Jilin China

In order to solve the pixel divergence problem brought by print and scan process, propose the algorithm that applying stretching contrast grade to adjust image pixel divergence. The parameter setting of this adjusting method uses peak signal noise ratio as standard of measurement, even though using different printer and scanner, we can also get good adjusting image. Simulation results show that the method can improve the effect of watermark detection or extraction effectively. Based on the character that symbol of parts of image’s DCT coefficient will not change, we propose self-adapting resist print and scan digital watermarking algorithm based on partitioning DCT. This algorithm imbed watermark adaptively, it can improve the capability of imbedded watermark and can also maintenance image quality. Experiment result shows that this algorithm can realize anti-counterfeit of soft-cover certificate using watermark technology.

关键词： Watermarking Partitioning algorithms Pixel Discrete cosine transforms change detection algorithms PSNR Measurement standards Noise measurement Printers Resists

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Research on algorithms for association rules mining based on FP-tree

Research on algorithms for association rules mining based on...

引用

International Symposium on Systems and Control in Aerospace and Astronautics (ISSCAA)

作者： Zhun Zhou Bingru Yang Yunfeng Zhao Wei Hou School of Information Engineering University of Science and Technology Beijing Beijing China

Technology of frequent pattern tree is presented in the paper. This paper analyzes the defect and limitation of algorithm based on classic frequent pattern of association rules. Then based on KDD* model this article implement an association rules algorithms based on IFP-tree. The middle results and finally frequent patterns of the algorithm are stored on database. The algorithm in build IFP-tree and speed of mining frequent patterns has certain improvement. Finally, the experiments reports in the paper confirmed that IFP-tree algorithm if effective and reliable for mining association rules.

关键词： Association rules Data mining Transaction databases Paper technology Algorithm design and analysis Pattern analysis Buildings change detection algorithms Marketing and sales Itemsets

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A novel steganalysis of data hiding in binary text images

A novel steganalysis of data hiding in binary text images

引用

International Conference on Communication Systems

作者： Yan-yan Meng Bao-jian Gao Qiang Yuan Fu-gen Yu Cui-fang Wang Northwest University Xi'an Shaanxi CN College of Communication Science Northwest University Xian China

Through massive experiments we found that for the binary text image embedding algorithm which hiding information by flipping central pixels of the image block, the statistics of run length between cover image and the image after been embedded is different obviously, but which between stego image and the image after test embedding is similar. Based on this law, a novel technique for the steganalysis of binary text image is presented in this paper. In which a test message is embedded in the text image firstly, then the run length statistic difference between text image and the image after embedded is calculated. When the difference exceeds the threshold value, the image is a cover image, otherwise it¿s a stego image. Through the classification experiment, the threshold of several typical characters had identified and the experimental results showed that the detection rate can reach 99.9% by using of the proposed method and the related threshold.

关键词： Data encapsulation Pixel Statistical analysis Testing Steganography Educational institutions Statistics change detection algorithms Digital images Shape

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Discrete Mobile User Tracking Algorithm via Velocity Estimation for Microcellular Urban Environment

Discrete Mobile User Tracking Algorithm via Velocity Estimat...

引用

IEEE Conference on Vehicular Technology (VTC)

作者： N. Mirmotahhary A. Kohansal H. Zamiri-Jafarian M. Mirsalehi Communications and Computer Research Center Ferdowsi University of Mashhad Mashhad Iran Dept. of Electr. Eng. Ferdowsi Univ. Mashhad Department of Electrical Engineering Ferdowsi University of Mashhad Mashhad Iran

A novel discrete tracking algorithm for mobile user based on velocity estimation in microcellular urban environment is proposed in this paper. By partitioning the mobile path and defining each partition as a state, the proposed algorithm tracks the mobile user based on hidden Markov model (HMM). The short-time Fourier analysis of the received signal strength is employed to estimate the mobile speed. Based on averaged received power (local mean), pathless, velocity estimation and using dynamic programming technique, the proposed algorithm predicts the next state of the mobile user. The proposed tracking algorithm shows good ability to predict user mobility behavior in urban area with multipath fading and shadowing phenomena.

关键词： Fading Partitioning algorithms Dynamic programming Shadow mapping Frequency estimation Mobile computing Hidden Markov models change detection algorithms Amplitude estimation Scattering

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12N test procedure for NPSF testing and diagnosis for SRAMs

12N test procedure for NPSF testing and diagnosis for SRAMs

引用

IEEE International Conference on Semiconductor Electronics (ICSE)

作者： R.R. Julie W.H. Wan Zuha R.M. Sidek Department of Electrical and Electronics Engineering University Putra Malaysia Malaysia

Testing and diagnosis techniques play a key role in the advance of semiconductor memory technologies. The challenge of failure detection has attracted investigation on efficient testing and diagnosis algorithm for better fault coverage and diagnostic resolution. March algorithms are widely used in SRAM testing to detect and diagnose SRAM fault model since they are relatively simple and yet providing high fault coverage and diagnostic resolution. In this case to achieve high fault coverage the structure of the consecutive memory backgrounds are very important. This paper aims to prove the efficiency of March 12N algorithm in term of detection and identification capability and locate the NPSF model fault. The details of test and diagnosis procedures for NPSF are demonstrated in this paper. The fault detection and diagnostic of the SRAM memories in this paper is verified and proven. The required march elements, detection requirement, detection conditions and fault syndromes are also enlightened. Furthermore, these particulars are required to determine a good algorithm other applications.

关键词： Random access memory Fault detection Fault diagnosis Test pattern generators Electronic equipment testing Algorithm design and analysis change detection algorithms Semiconductor device testing Semiconductor memory Electrical fault detection

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Assessment of Feature Selection Techniques for Support Vector Machine Classification of Satellite Imagery

Assessment of Feature Selection Techniques for Support Vecto...

引用

IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Tarek Habib Jordi Inglada Gregoire Mercier Jocelyn Chanussot GIPSA-Lab (Signal and Images Department) CNRS I. N. P. Grenoble France Centre national d'études spatiales (Cnes - DCT/SI/AP) Institut Telecom Telecom Bretagne / CNRS FRE 3167 LabSTICC/CID.

The problem of focusing on the most relevant information in a potentially overwhelming quantity of data has become increasingly important. Using irrelevant or noisy features not only can affect the accuracy of the classification results obtained but also the convergence time. In this paper several feature selection algorithms used with the Support Vector Machine (SVM) algorithm are presented. The feature selection algorithms are classified as filter and wrapper approaches. Two different wrapper techniques are presented: the first one uses the generalization error estimate of the leave-one-example-out error, while the second one uses the error estimate of the leave-one-feature-out error. Filter approaches with 4 different parameters are presented, namely: the mutual information, the FScore, and two advanced entropy measures are studied. Results in the context of change detection using satellite imagery are then discussed.

关键词： Support vector machine classification Support vector machines Filters Testing change detection algorithms Telecommunications Machine learning algorithms Kernel Artificial satellites Indium phosphide

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