Filters








273,898 Hits in 8.2 sec

A Study of Stability for Field Robot using Energy Stability Level Method
에너지안정성 레벨을 이용한 필드로봇의 안정성에 관한 연구

C.T. Nguyen, Q.H. Le, Y.M. Jeong, S.Y. Yang
2014 Journal of Drive and Control  
The energy stability level is calculated by using the dynamic models of Field Robot, subjected to the concept of equilibrium plane and support boundary.  ...  In this research, the energy stability level method is used for examining the stable state of Field Robot under effects of swing motion, at particular postures of manipulator, and terrain conditions.  ...  Acknowledgements This work was supported by 2014 Special Research Fund of Mechanical Engineering at the University of Ulsan.  ... 
doi:10.7839/ksfc.2014.11.3.022 fatcat:damuvbpkrrgyfcschkbu2lu55q

Measurement of Road Surface Irregular Crack Width Based on Ferret and Second Order Moment

Liu Sheng, Wang Weixing, Wang Fengping
2016 International Journal of Signal Processing, Image Processing and Pattern Recognition  
In order to evaluate the damage of the road accurately, a Ferret subsection measurement method based on Invariant moment was proposed.  ...  In order to section reasonably, a method based on distance map was proposed. In the extreme value points, the subsections image was finished.  ...  When the vertical distance of the two lines reaches to minimum, this distance will be the object width. Therefore we can calculate the length and width of irregular graphics.  ... 
doi:10.14257/ijsip.2016.9.12.06 fatcat:5en3pe34t5b3xggrbjmyqenohu

Image Information Retrieval From Incomplete Queries Using Color and Shape Features

Bikesh Kumar Singh
2011 Signal & Image Processing An International Journal  
Content based image retrieval (CBIR) is the task of searching digital images from a large database based on the extraction of features, such as color, texture and shape of the image.  ...  The query image is considered to be distorted or incomplete image if it has some missing information, some undesirable objects, blurring, noise due to disturbance at the time of image acquisition etc.  ...  Since the colored image has several kinds of objects, Fourier descriptor may be the best possible descriptor for calculating the boundaries of the objects present in the images.  ... 
doi:10.5121/sipij.2011.2418 fatcat:lyg73kwlxzba7n7476dnva7w34

Moments Added Statistical Shape Model for Boundary Extraction

Haechul CHOI, Ho Chul SHIN, Si-Woong LEE, Yun-Ho KO
2009 IEICE transactions on information and systems  
Furthermore, a differential equation for the moment of overall shape is derived for shape refinement, which leads to accurate and rapid deformation of a boundary template toward real object boundary.  ...  In this paper, we propose a method for extracting an object boundary from a low-quality image such as an infrared one.  ...  The moments of the boundary are first calculated and they are projected to the SMM. Then an approximated moments reflecting prior knowledge on moments of training set are obtained.  ... 
doi:10.1587/transinf.e92.d.2524 fatcat:4oisbupgb5bbnhj7u5tv7u5o6e

Boundary detection using simulation of particle motion in a vector image field

N. Eua-Anant, L. Udpa
1999 IEEE Transactions on Image Processing  
An example of a vector operation is the computation of mechanical moments for detecting inhomogeneities in an object or equivalently edges in an image.  ...  The object boundary can be obtained from the convergent path of the particle trajectory. Using a fine stepping factor, the extracted boundary can achieve subpixel accuracy.  ...  has little effect on the total object boundary.  ... 
doi:10.1109/83.799884 pmid:18267431 fatcat:zclt6stz2vgx5dhfdk2q6ru37a

A Comparative Study on Weighted Central Moment and Its Application in 2D Shape Retrieval

Xin Shu, Qianni Zhang, Jinlong Shi, Yunsong Qi
2016 Information  
Moment invariants have been extensively studied and widely used in object recognition.  ...  The main contribution of this paper is that we propose several different weighting functions to calculate the central moment according to human visual processing.  ...  In the process of the central moment being calculated, pixels closer to the object boundary should be assigned larger weights and inner pixels farther away from the object boundary should be assigned smaller  ... 
doi:10.3390/info7010010 fatcat:33ri65bmyzeixgc2xj6zcilxxa

Balloon energy based on parametric active contour and directional Walsh–Hadamard transform and its application in tracking of texture object in texture background

Homa Tahvilian, Payman Moallem, Amirhassan Monadjemi
2012 EURASIP Journal on Advances in Signal Processing  
The comparison between our method and the active contour method based on the moment demonstrates that our method is more effective in tracking object boundary edges used for video streams with a changing  ...  One of the popular approaches in object boundary detecting and tracking is active contour models (ACM).  ...  Texture features of contour and object points are calculated by a method based on moment.  ... 
doi:10.1186/1687-6180-2012-253 fatcat:3khepvlx6fbwnp5u2u6c5emjoe

Refined moment calculation using image block representation

J. Flusser
2000 IEEE Transactions on Image Processing  
This paper deals with effective calculation of moments of binary images. Recently, Spiliotis and Mertzios [1] published a method based on image block representation (IBR).  ...  We propose a refinement of their method which yields exact results and performs even more effectively. Index Terms-Binary image, image block representation, moment calculation.  ...  Another group of methods is based on Green's theorem, which evaluates the double integral over the object by means of single integration along the object boundary [2] , [7] - [9] .  ... 
doi:10.1109/83.877219 pmid:18262933 fatcat:n2ld64vx3zdwlk5hl5e2r7rbvi

Estimation of Bending Moment Coefficients of Two Way Rc Slabs: Finite Element Approach

Udit Agrawal, Akshay Garg, Vansh Dhingra, Visuvasam Joseph Antony
2016 Indian Journal of Science and Technology  
Objective: The main objective of this study is to find out the bending moment co-efficient of two way reinforced concrete (RC) slabs.  ...  Based on the observation of yield line pattern, the bending moment coefficients were found. The obtained values were compared with IS: 456 recommendations.  ...  Based on yielding of material at edges and mid span, • bending moment coefficients shall be calculated. value reaches its maximum i.e. 0.001 and plastic strain reaches 0.001043.  ... 
doi:10.17485/ijst/2016/v9i30/99239 fatcat:qnlm354g55avneu6hfzlf3yryy

Moment Features Weighting for Image Retrieval

HabibollahAgh Atabay
2016 IOSR Journal of Computer Engineering  
This paper presents an effective moment weighting method according to image reconstruction and retrieval accuracyto reduce the dimensionality of moment-based features.  ...  Feature selection is an effective tool to improve the performance of content based image retrieval systems.  ...  Shape features can be mainly categorized into two groups: contour-based descriptors that are computed from the shape boundary only and region-based descriptors that are based on both the boundary and interior  ... 
doi:10.9790/0661-1805043237 fatcat:z3bprmstyfewnmd3v3qr476b24

Global Contour and Region Based Shape Analysis and Similarity Measures

Debasis Chaudhuri
2013 Defence Science Journal  
Object classification often operates by making decisions based on the values of several shape properties measured from an image of the object.  ...  Shape analysis is a useful tool for recognition of an object.  ...  Shape representation generally looks for effective and perceptually important shape features based on either shape boundary information or boundary plus interior content.  ... 
doi:10.14429/dsj.63.3767 fatcat:h4k7xsglhbe2jb7oe3ujl2zgny

Numerical calculation and experimental validation of RCS analysis for radome-enclosed scatterer by using PMCHWT-formulation

Yoshio Inasawa, Masayuki Saito, Izuru Naito, Yoshihiko Konishi
2011 2011 XXXth URSI General Assembly and Scientific Symposium  
We verify the method of moments using the PMCHWT-formulation is sufficiently accurate for RCS analysis of radomeenclosed scatterer.  ...  We show that calculated scattering cross section patterns of a dielectric coated conducting sphere agree with exact solutions.  ...  Conclusion We have investigated the accuracy of RCS analysis for radome-enclosed scatterer calculated by the method of moments using the PMCHWT-formulation.  ... 
doi:10.1109/ursigass.2011.6050482 fatcat:7vm365zcjfeijkz6l4qqxcvxx4

Effects of Manufacturing Variability on Model-Based CT Image Reconstruction [chapter]

J. W. Eberhard, K. H. Hedengren, M. L. Hsiao
1989 Review of Progress in Quantitative Nondestructive Evaluation  
Registration techniques, based on the first and second moments, are used to remove the effects of blade positional variation.  ...  A registration method, based on the first and second moments, has been developed and used to remove the effects of positional variation.  ... 
doi:10.1007/978-1-4613-0817-1_286 fatcat:x36o2hdmavfgffxhshowcyqn7m

Closed-form solutions to constrained control allocation problem

Kenneth A. Bordingnon, Wayne C. Durham
1995 Journal of Guidance Control and Dynamics  
To calculate the volume of such an object, the (n — 1)-dimensional bounding objects are treated as the bases of n-dimensional pyramids with their apexes at the origin of moment space.  ...  Nomenclature B = matrix of control effectiveness m = number of controls m = vector of moments n = dimension of generalized moment space u = vector of controls 9(Z) = boundary of set £ Il = subset of moments  ... 
doi:10.2514/3.21497 fatcat:3derwfjpp5gmpeuvlyp2tumawu

Shape Feature Extraction Techniques for Fruits: A Review

Israa Mohammed Hassoon
2021 Iraqi Journal of Science  
quality estimation, are discussed in order to provide a good understanding of the use of shape-based feature extraction techniques.  ...  In this study, the advantages and disadvantages of the various shape-based feature extraction algorithms and technologies that are used in sorting, classifying, and grading of fruits, as well as fruits  ...  Fractal dimension is the best for capturing boundaries of irregular objects like fruits [11] .  ... 
doi:10.24996/ijs.2021.62.7.31 fatcat:liqmdcbpmfhr3ojst4p55s34ze
« Previous Showing results 1 — 15 out of 273,898 results