检索结果-内蒙古大学图书馆

Color invariant object recognition using entropic graphs

INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY 2006年第5期16卷 146-153页

作者： van Gemert, Jan C. Burghouts, Gertjan J. Seinstra, Frank J. Geusebroek, Jan-Mark Univ Amsterdam Inst Informat Intelligent Syst Lab Amsterdam Amsterdam Netherlands

We present an object recognition approach using higher-order color invariant features with an entropy-based similarity measure. Entropic graphs offer an unparameterized alternative to common entropy estimation techniques, such as a histogram or assuming a probability distribution. An entropic graph estimates entropy from a spanning graph structure of sample data. We extract color invariant features from object images invariant to illumination changes in intensity, viewpoint, and shading. The Henze-Penrose similarity measure is used to estimate the similarity of two images. Our method is evaluated on the ALOI collection, a large collection of object images. This object image collection consists of 1000 objects recorded under various imaging circumstances. The proposed method is shown to be effective under a wide variety of imaging conditions. (C) 2007 Wiley Periodicals, Inc.

关键词： object recognition color invariance entropy parallel image processing

来源：评论

学校读者我要写书评

暂无评论

parallel Computing for Fast and Accurate Phase Analysis of Fringe Pattern by Two-Dimensional Phase-Shifting Methods

Parallel Computing for Fast and Accurate Phase Analysis of F...

引用

International Conference on Optical and Photonics Engineering (icOPEN)

作者： Ri, Shien Wang, Qinghua Tsuda, Hiroshi Natl Inst Adv Ind Sci & Technol Tsukuba Ibaraki Japan

ISBN: (数字)9781510610026

ISBN: (纸本)9781510610019;9781510610026

Phase analysis techniques of fringe patterns have been widely used for noncontact three-dimensional shape and deformation measurement by the fringe projection method. Recently, we developed two novel accurate phase analysis methods. One is the two-dimensional sampling moire method to perform robust phase analysis for a single-shot fringe pattern. The other is the two-dimensional spatiotemporal phase-shifting method to analyze phase distribution accurately for multi-step phase-shifted fringe patterns. To perform accurate phase analysis under low signal-to-noise ratio conditions, both the above two methods use the two-dimensional discrete Fourier transform or fast Fourier transform. Therefore, these algorithms are computationally expensive compared with the conventional one-dimensional sampling moire and phase-shifting methods. In this study, a fast parallelization implementation for two-dimensional phase-shifting methods, including the two-dimensional sampling moire method and the spatiotemporal phase-shifting method, are presented by utilizing multi-core CPU. Simulation and experimental results demonstrate that phase analysis can reach 7.5 and 5.9 times faster by use of a 12-core CPU compared with a single CPU.

关键词： Fringe pattern phase-shifting method spatiotemporal parallel image processing multi-core CPU

来源：评论

学校读者我要写书评

暂无评论

parallel computation of level set method for 500 Hz visual servo control

Parallel computation of level set method for 500 Hz visual s...

引用

28th International Congress on High-Speed Imaging and Photonics

作者： Fei, Xianfeng Igarashi, Yasunobu Hashimoto, Koichi Tohoku Univ Grad Sch Informat Sci Aoba Ku Sendai Miyagi 9808579 Japan

ISBN: (纸本)9780819473608

We propose a 2D microorganism tracking system using a parallel level set method and a column parallel vision system (CPV). This system keeps a single microorganism in the middle of the visual field under a microscope by visual servoing an automated stage. We propose a new energy function for the level set method. This function constrains an amount of light intensity inside the detected object contour to control the number of the detected objects. This algorithm is implemented in CPV system and computational time for each frame is 2 [ms], approximately. A tracking experiment for about 25 s is demonstrated. Also we demonstrate a single paramecium can be kept tracking even if other paramecia appear in the visual field and contact with the tracked paramecium.

关键词： level set method parallel image processing visual servoing and microscope

来源：评论

学校读者我要写书评

暂无评论

Hardware support for shape decoding from 2D-region-based image representations

Hardware support for shape decoding from 2D-region-based ima...

引用

Conference on Multimedia Hardware Architectures 1997

作者： Privat, G LeHin, I France-Telecom Grenoble (France)

ISBN: (纸本)0819424323

Graphics systems have long been using standard libraries or APIs to insulate applications from implementation specifics. The same approach is applicable to natural image representations based on object primitives, such as proposed for MPEG4 standardization. The rendering of these image objects can be hidden behind APIs and supported either in hardware or software, depending on the level of representation they address, so that higher-level manipulation of these objects is made independent of the pixel level, We evaluate the trade-offs involved in the choice of these primitives to be used as pivotal intermediate representations. The example addressed is shape coding for image regions obtained from segmentation. Shape coding primitives based on either contour (chain codes), union of elementary patterns and alpha-plane are evaluated with regard to both the possibility to support them on different architecture models and the level of functionalities they make available.

关键词： image representation segmentation shape coding API parallel image processing

来源：评论

学校读者我要写书评

暂无评论

High Performance Embedding Environment for Reacting Suddenly Appeared Road Obstacles

High Performance Embedding Environment for Reacting Suddenly...

引用

2014 IEEE International Conference on Robotics and Biomimetics (ROBIO)

作者： Premachandra, Chinthaka Okamoto, Yutaro Kato, Kiyotaka Tokyo Univ Sci Grad Sch Engn Niiju Ku Tokyo 1258585 Japan

ISBN: (纸本)9781479973972

We present a high performance embedding environment for developing vision based vehicle/robot controlling. This particular environment is consisted of two main parts as recognition part and control part. Former can conducts vision based recognition targets such as obstacle detection while latter can controls the vehicle/robot in real time following the recognition information. The tests were conducted to confirm the performance of the proposed embedding environment, installing it on a wheel robot. Here, the test was conduct to stop the moving robot when an obstacle appeared suddenly. In the experiments, system could conduct obstacle detection as well as motor controlling effectively in order to stop the robot.

关键词： suddenly appeared obstacle detection parallel image processing motor controlling compact embedding hardware

来源：评论

学校读者我要写书评

暂无评论

Computational Challenges in processing Large Hyperspectral images

Computational Challenges in Processing Large Hyperspectral I...

引用

5th Romania Tier 2 Federation Grid, Cloud and High Performance Computing Science (RO-LCG)

作者： Toma, Adina C. Panica, Silviu Zaharie, Daniela Petcu, Dana West Univ Timisoara Dept Comp Sci Timisoara Romania

ISBN: (纸本)9781467322423;9789786627113

The processing of large hyperspectral images presents challenges from both memory usage and computation points of view. Large images require proper partitioning in order to be stored in memory and to exploit the benefits of parallel implementation on high performance computing architectures. This paper analyzes several variants of reading and distributing large images and presents critical issues and some corresponding solutions in designing efficient parallel implementations of two clustering algorithms which use both spectral and spatial information. All experiments were conducted on a BlueGene/P supercomputer using up to 1024 processors.

关键词： large hyperspectral images Fuzzy c-Means morphological operators image partitioning parallel image processing high performance computing

来源：评论

学校读者我要写书评

暂无评论

A flexible software architecture for scalable real-time image and video processing applications

A flexible software architecture for scalable real-time imag...

引用

Conference on Real-Time image and Video processing

作者： Usamentiaga, Ruben Molleda, Julio Garcia, Daniel F. Bulnes, Francisco G. Univ Oviedo Dept Comp Sci & Engn Gijon 33204 Asturias Spain

ISBN: (纸本)9780819491299

Real-time image and video processing applications require skilled architects, and recent trends in the hardware platform make the design and implementation of these applications increasingly complex. Many frameworks and libraries have been proposed or commercialized to simplify the design and tuning of real-time image processing applications. However, they tend to lack flexibility because they are normally oriented towards particular types of applications, or they impose specific data processing models such as the pipeline. Other issues include large memory footprints, difficulty for reuse and inefficient execution on multicore processors. This paper presents a novel software architecture for real-time image and video processing applications which addresses these issues. The architecture is divided into three layers: the platform abstraction layer, the messaging layer, and the application layer. The platform abstraction layer provides a high level application programming interface for the rest of the architecture. The messaging layer provides a message passing interface based on a dynamic publish/subscribe pattern. A topic-based filtering in which messages are published to topics is used to route the messages from the publishers to the subscribers interested in a particular type of messages. The application layer provides a repository for reusable application modules designed for real-time image and video processing applications. These modules, which include acquisition, visualization, communication, user interface and data processing modules, take advantage of the power of other well-known libraries such as OpenCV, Intel IPP, or CUDA. Finally, we present different prototypes and applications to show the possibilities of the proposed architecture.

关键词： Software architecture parallel image processing real-time image processing

来源：评论

学校读者我要写书评

暂无评论

Color invariant object recognition using entropic graphs

Color invariant object recognition using entropic graphs

引用

Working Conference on Computer Vision

作者： van Gemert, Jan C. Burghouts, Gertjan J. Seinstra, Frank J. Geusebroek, Jan-Mark Univ Amsterdam Inst Informat Intelligent Syst Lab Amsterdam Amsterdam Netherlands

关键词： object recognition color invariance entropy parallel image processing

来源：评论

学校读者我要写书评

暂无评论

Direct, object brightness estimation from atmospheric turbulence degraded images using a new, high-speed, modified phase diversity method

Direct, object brightness estimation from atmospheric turbul...

引用

Conference on Visual Information processing XVII

作者： Arrasmith, William W. Florida Inst Technol Melbourne FL 32901 USA

ISBN: (纸本)9780819471697

The well known phase diversity technique has long been used as a premier passive imaging method to mitigate the degrading effects of atmospheric turbulence on incoherent optical imagery. Typically, an iterative, slow method is applied that uses the Zernike basis set and 2-D Fourier transforms in the reconstruction process. In this paper, we demonstrate a direct method for estimating the un-aberrated object brightness from phase or phase difference estimates that 1) does not require the use of the Zernike basis set or the intermediate determination of the generalized pupil function, 2) directly determines the optical transfer function without the requirement for an iterative sequence of 2-D Fourier Transforms, 3) provides a more accurate result than the Zernike-based approaches since there are no Zernike series truncation errors, 4) lends itself to fast and parallel implementation, and 5) can use stochastic search methods to rapidly determine simultaneous phases or phase differences required to determine the correct optical transfer function estimate. As such, this new implementation of phase diversity provides potentially faster, more accurate results than previous approaches yet still retains inherent compatibility with the traditional Zernike-based methods. The theoretical underpinnings of this new method along with demonstrative computer simulation results are presented.

关键词： phase diversity parallel image processing image reconstruction neural network imaging methods turbulence compensation image processing

来源：评论

学校读者我要写书评

暂无评论

Face extraction and recognition from public images using HIPI 14

Face extraction and recognition from public images using HIP...

引用

14th International Conference on Electronics Computer and Computation (ICECCO)

作者： Bogdanchikov, Andrey Kariboz, Darmen Meraliyev, Meraryslan Suleyman Demirel Univ Dept Comp Sci Kaskelen Kazakhstan

ISBN: (纸本)9781728101323

Social networking services with public data are widely used nowadays. Billions of images uploaded to the internet each day over the world. This paper proposes the idea of a system which is currently being developed. The system collects images from public sources by some specific criteria, applies face detection and recognition algorithms on collected images, and provides the results in readable form. The Apache Hadoop library is used to increase performance of the system, and images are downloaded by the help of HIPI library. For testing purposes Labeled Faces in the Wild benchmark is used as a database for images containing over 13233 images of 5749 identities. Each image is jpg format in 250*250 resolutions. Results were more than good after testing the system with this database for face detection and recognition.

关键词： image collection face detection face recognition Hadoop HIPI parallel image processing

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：