检索结果-内蒙古大学图书馆

research on the reconstruction of fast and accurate AFM probe model

Chinese Science Bulletin 2010年第24期55卷 2750-2754页

作者： YUAN Shuai DONG ZaiLi MIAO Lei XI Ning WANG YueChao State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Electrical and Computer Engineering Michigan State University USA

The AFM image will be distorted due to the tip-broadening effect. It may be mathematically represented as the effect of the tip's convolution on the real image. As a result, the true geometry of the sample surface can not be obtained. If the tip shape could be known accurately, such distortion can be eliminated with the adoption of disconvolution operation. It is of practical significance in the accurate reconstruction of the AFM image. Among the current tip modeling algorithms, the blind tip estimation algorithm based on mathematical morphology is widely applied. However, it takes much time and has difficulties in defining the optimal noise threshold. In view of the above problems, this paper proposes a new blind tip evaluation method to accelerate the speed of blind tip modeling calculation and realize the accurate reconstruction of the AFM image. The simulation and the experimental results demonstrate the feasibility and effectiveness of the above research method.

关键词： AFM探针原子力显微镜数学形态学图像效果模型几何形状精确重建建模算法

来源：评论

学校读者我要写书评

暂无评论

Road Network Extraction Using Edge Detection and Spatial Voting

Road Network Extraction Using Edge Detection and Spatial Vot...

引用

International Conference on Pattern Recognition

作者： Beril Sirmacek Cem Unsalan Computer Vision Research Laboratory Department of Electrical and Electronics Engineering Yeditepe University Istanbul Turkey

ISBN: (纸本)9781424475421

Road network detection from very high resolution satellite images is important for two main reasons. First, the detection result can be used in automated map making. Second, the detected network can be used in trajectory planning for unmanned aerial vehicles. Although an expert can label road pixels in a given satellite image, this operation is prone to errors. Therefore, an automated system is needed to detect the road network in a given satellite image in a robust manner. In this study, we propose a novel approach to detect the road network from a given panchromatic Ikonos satellite image. Our method has five main steps. First, we apply a nonlinear bilateral filtering to smooth the given image. Then, we extract Canny edges and the gradient information as local features. Using these local features, we generate a spatial voting matrix. This voting matrix indicates the possible locations of the road network pixels. By processing this voting matrix in an iterative manner, we detect initial road pixels. Finally, we apply a tracking algorithm on the voting matrix to detect the missing road pixels. We tested our method on various satellite images and provided the extracted road networks in the experiments section.

关键词： Roads Image segmentation Satellites Feature extraction Pixel Image edge detection Image resolution

来源：评论

学校读者我要写书评

暂无评论

Computationally effective stereovision SLAM

Computationally effective stereovision SLAM

引用

IEEE International Conference on Imaging Systems and Techniques

作者： Nalpantidis, Lazaros Sirakoulis, Georgios Ch. Carbone, Andrea Gasteratos, Antonios Laboratory of Robotics and Automation Department of Production and Management Engineering Democritus University of Thrace University Campus Kimmeria GR-67100 Xanthi Greece Laboratory of Electronics Department of Electrical and Computer Engineering Democritus University of Thrace University Campus Kimmeria GR-67100 Xanthi Greece Autoagent Laboratory for Cognitive Robotics Department of Computer and Systems Science University of Rome La Sapienza Via Ariosto 25 00185 Rome Italy

ISBN: (纸本)9781424464944

In this paper a visual Simultaneous Localization and Mapping (SLAM) algorithm suitable for indoor area measurement applications is proposed. The algorithm is focused on computational effectiveness. The only sensor used is a stereo camera placed onboard a moving robot. The algorithm processes the acquired images calculating the depth of the scenery, detecting occupied areas and progressively building a map of the environment. The stereo vision-based SLAM algorithm embodies a custom-tailored stereo correspondence algorithm, the robust scale and rotation invariant feature detection and matching Speeded Up Robust Features (SURF) method, a computationally effective v-disparity image calculation scheme, a novel map-merging module, as well as a sophisticated Cellular Automata (CA)-based enhancement stage. The proposed algorithm is suitable for autonomously mapping and measuring indoor areas using robots. The algorithm is presented and experimental results for self-captured image sets are provided and analyzed. © 2010 IEEE.

关键词： Stereo vision

来源：评论

学校读者我要写书评

暂无评论

Performance evaluation of three schemes applied to bilateral control of a hydraulic actuator interacting with deformable environments

Performance evaluation of three schemes applied to bilateral...

引用

2010 IEEE International Conference on robotics and Biomimetics, ROBIO 2010

作者： Esfandiari, M. Zarei-nia, K. Fung, W.K. Sepehri, N. Fluid Power Research Laboratory University of Manitoba Winnipeg MB Canada Department of Electrical and Computer Engineering University of Manitoba Winnipeg MB Canada

ISBN: (纸本)9781424493173

In this paper, the effect of deformable environment to the performance of three bilateral teleoperation control schemes for hydraulic actuators are investigated through dynamic simulation. The considered schemes are Force Reflection, Position Error and Lyapunov feedback controllers. Two type of environments are considered, first is spring model and the second one is environment which is described by the Hertz contact model. Using a teleoperation platform, the master device is a PHANToM haptic device and the slave manipulator is a simulated hydraulic actuator. The master and slave are connected by the on-campus Intranet network setting with small and fairly constant communication delay. The stability and transparency of the overall system are evaluated according to the following criteria: (i) position tracking error of the slave manipulator;(ii) force tracking error of the master haptic device;and (iii) perceived stiffness of the environment at the master site. © 2010 IEEE.

关键词： Hydraulic actuators

来源：评论

学校读者我要写书评

暂无评论

Gender estimation based on physiological features of the face

Gender estimation based on physiological features of the fac...

引用

International Symposium on Signal Processing and Its Applications (ISSPA)

作者： C.H. Ting U.U. Sheikh S.A.R Abu-Bakar Computer Vision Video and Image Processing Research Laboratory Department of Microelectronics and Computer Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Malaysia

In this paper, we present a gender estimation technique that will determine whether a person looking at the camera is a male or female. Several facial features extracted from a face are passed to post-image-processing operations before they are sent to a rule-base classifier. We applied our technique to both static passport-like photos as well as several video sequences consisting of a single face each. Our database also contains images of females wearing headscarf as well as bald men. Our initial results showed a very promising outcome. For static face images, we obtained an accuracy of 100% correct gender estimation for females and 98% for males while for video sequences, the accuracy obtained was 87.5% for females and 70% for males.

关键词： Face Hair Image resolution Estimation computers Accuracy

来源：评论

学校读者我要写书评

暂无评论

Applying deep-layered clustering to mammography image analytics

Applying deep-layered clustering to mammography image analyt...

引用

2010 Biomedical Science and engineering Conference, BSEC 2010: Biomedical research and Analysis in Neuroscience, BRAiN

作者： Rose, Derek C. Arel, Itamar Karnowski, Thomas P. Paquit, Vincent C. Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 United States Image Science and Machine Vision Group Oak Ridge National Laboratory Oak Ridge TN 37831 United States

ISBN: (纸本)9781424467143

This paper details a methodology and preliminary results for applying a hierarchy of clustering units to mammographic image data. The identification of patients with breast cancer through the detection of microcalcifications and masses is a demanding classification problem;minimal false negatives are desired while simultaneously avoiding false positives that cause unnecessary cost to patients and health institutions. This research examines a segmented look at mammograms for computer aided detection with the goal of reliably labeling regions of interest requiring the attention of a radiologist. Classification is achieved by employing the building blocks, namely unsupervised clustering, of a deep learning architecture in tandem with a standard feed-forward neural network. Early results show promise for creating a classification engine that handles high-dimensional data with minimum engineering of image features, with a per-image patch sensitivity of 0.96 and specificity of 0.99. © 2010 IEEE.

关键词： Clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

Building detection in satellite images by textural features and Adaboost

Building detection in satellite images by textural features ...

引用

IAPR Workshop on Pattern Recognition in Remote Sensing (PRRS)

作者： Melih Cetin Ugur Halici Örsan Aytekin Computer Vision and Intelligent Systems Research Laboratory Department of Electrical and Electronics Engineering Middle East Technical University Turkey

A method based on textural features and Adaboost for detecting buildings in satellite images is proposed. Several local textural features including mean and standard deviation of image intensity and gradient, Zernike moments, Circular-Mellin features, Haralick features, Fourier Power Spectrum, Wavelets, Gabor Filters, and a set features extracted from HSV color space are extracted. Adaboost learning algorithm is employed for both classification and determining the beneficial feature subset, due to its feature selector nature. Some operation including morphological operators are applied for post processing. The approach was tested on a set of satellite images having different types of buildings and promising experimental results are achieved.

关键词： Buildings Feature extraction Pixel Satellites Classification algorithms Remote sensing Image color analysis

来源：评论

学校读者我要写书评

暂无评论

A pure vision-based approach to topological SLAM

A pure vision-based approach to topological SLAM

引用

2010 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Wen Lik Dennis Lui Ray Jarvis Intelligent Robotics Research Centre Department of Electrical and Computer Systems Engineering Monash University Australia

This paper describes a topological SLAM system using a purely vision-based approach. This robot utilizes a GPU-based omnidirectional catadioptric stereovision system to perceive and plan its path in the environment. Subsequently, the omnidirectional images generated are used to incrementally build a database of image signatures based on the standard 2D Haar Wavelet decomposition. In order to maintain a globally consistent topological map, a relaxation algorithm, which requires local metric information between nodes, is employed each time the appearance-based localization system revisits an existing node in the topological map. The relative transformation of the current position of the robot with respect to the actual position of the matched node is recovered by using a least squares estimation of the transformation parameters of two 3D point patterns generated by the stereovision system. In addition, local metric information is obtained by using the proposed visual odometry system which combines distance measurements calculated by using optical flow techniques which estimates the movement of a web camera relative to the ground being observed and bearing estimates from the omnidirectional catadioptric vision system. Experiments were conducted in a variety of environments ranging from indoor to outdoor environments which demonstrate the feasibility of this approach.

关键词： Visualization Robot kinematics Three dimensional displays Databases Cameras Robustness

来源：评论

学校读者我要写书评

暂无评论

Robust online map merging system using laser scan matching and omnidirectional vision

Robust online map merging system using laser scan matching a...

引用

2010 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Fredy Tungadi Wen Lik Dennis Lui Lindsay Kleeman Ray Jarvis Intelligent Robotics Research Centre Department of Electrical and Computer Systems Engineering Monash University Australia

This paper describes a probabilistic online map merging system for a single mobile robot. It performs intermittent exploration by fusing laser scan matching and omnidirectional vision. Moreover, it can also be adapted to a multi-robot system for large scale environments. Map merging is achieved by means of a probabilistic Haar-based place recognition system using omnidirectional images and is capable of discriminating new and previously visited locations in the current or previously collected maps. This dramatically reduces the search space for laser scan matching. The combination of laser range finding and omnidirectional vision is very attractive because they reinforce one another when there is sufficient structure and visual information in the environment. In other cases, they complement one another, leading to improved robustness of the system. This is the first system to combine a probabilistic Haar-based place recognition system using omnidirectional images with laser range finding to merge maps. The proposed system is also algorithmically simple, efficient and does not require any offline processing. Experimental results of the approach clearly illustrate that the proposed system can perform both online map merging and exploration robustly using a single robot configuration in a real indoor lab environment.

关键词： Merging Simultaneous localization and mapping Laser modes Probabilistic logic

来源：评论

学校读者我要写书评

暂无评论

An experimental study on imaging Burkitt's lymphoma cells by atomic force microscope

An experimental study on imaging Burkitt's lymphoma cells by...

引用

IEEE International Conference on Nano/Micro Engineered and Molecular Systems

作者： Li, Mi Liu, Lianqing Xi, Ning Wang, Yuechao Dong, Zaili Li, Guangyong Xiao, Xiubin Yuan, Shunzong Zhang, Weijing State Key Laboratory of Robotics Shenyang Institute of Automation CAS Shenyang 110016 China Department of Electrical and Computer Engineering Michigan State University East Lansing MI 48824 United States Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh PA 15261 United States Department of Lyphoma Military Medical Academy of Sciences Beijing 100071 China Graduate University of Chinese Academy of Sciences Beijing 100001 China

ISBN: (纸本)9781424465439

Burkitt's lymphoma (BL) is a highly aggressive malignant tumor with high morbidity rate in children. Patients have different responses to the same therapy due to the molecular heterogeneity. Detailed observation of the surface structure of BL cells to locate the specific receptors (CD20) on the cell surface and measure the binding force between the CD20s and their cognate ligands (Rituximab) may give people a further understanding to BL cell's intrinsic properties and provide complementary approaches for the next generation of drug research and development. In this paper, we give an experimental study on how to obtain the morphology images of the BL cells both in air and liquid with atomic force microscope (AFM).The detailed procedures such as sample preparation of BL cells, parameter setting of AFM and so on, are presented, and the experimental results illustrate that the morphology image of the BL cell can be obtained in air or liquid respectively by using AFM. ©2010 IEEE.

关键词： Morphology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：