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Search Results: 1 - 10 of 200481 matches for " P. Kamencay "
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Improved Depth Map Estimation from Stereo Images based on Hybrid Method
P. Kamencay,M. Breznan,R. Jarina,P. Lukac
Radioengineering , 2012,
Abstract: In this paper, a stereo matching algorithm based on image segments is presented. We propose the hybrid segmentation algorithm that is based on a combination of the Belief Propagation and Mean Shift algorithms with aim to refine the disparity and depth map by using a stereo pair of images. This algorithm utilizes image filtering and modified SAD (Sum of Absolute Differences) stereo matching method. Firstly, a color based segmentation method is applied for segmenting the left image of the input stereo pair (reference image) into regions. The aim of the segmentation is to simplify representation of the image into the form that is easier to analyze and is able to locate objects in images. Secondly, results of the segmentation are used as an input of the local window-based matching method to determine the disparity estimate of each image pixel. The obtained experimental results demonstrate that the final depth map can be obtained by application of segment disparities to the original images. Experimental results with the stereo testing images show that our proposed Hybrid algorithm HSAD gives a good performance.
A Novel Approach to Face Recognition using Image Segmentation based on SPCA-KNN Method
P. Kamencay,M. Zachariasova,R. Hudec,R. Jarina
Radioengineering , 2013,
Abstract: In this paper we propose a novel method for face recognition using hybrid SPCA-KNN (SIFT-PCA-KNN) approach. The proposed method consists of three parts. The first part is based on preprocessing face images using Graph Based algorithm and SIFT (Scale Invariant Feature Transform) descriptor. Graph Based topology is used for matching two face images. In the second part eigen values and eigen vectors are extracted from each input face images. The goal is to extract the important information from the face data, to represent it as a set of new orthogonal variables called principal components. In the final part a nearest neighbor classifier is designed for classifying the face images based on the SPCA-KNN algorithm. The algorithm has been tested on 100 different subjects (15 images for each class). The experimental result shows that the proposed method has a positive effect on overall face recognition performance and outperforms other examined methods.
黄金科学技术 , 1991,
Land Use and Land Cover Changes in a Tropical River Basin: A Case from Bharathapuzha River Basin, Southern India  [PDF]
P. P. Nikhil Raj, P. A. Azeez
Journal of Geographic Information System (JGIS) , 2010, DOI: 10.4236/jgis.2010.24026
Abstract: A study of the spatial and temporal changes in land use and land cover (LULC) was conducted using Remote Sensing and GIS. We analyzed the LULC of Bharathapuzha river basin, south India using multispectral LANDSAT imageries of 1973-2005 time periods. 31% depletion in the natural vegetation cover and 8.7% depletion in wetland agriculture area were seen in the basin during the period. On the other hand the urban spread in the basin increased by 32%. The study highlights the need for a scientific management plan for the sustainability of the river basin, keeping in view the recent climatic anomalies and hydrological conditions of the basin.
Morphometric Analysis of a Tropical Medium River System: A Case from Bharathapuzha River Southern India  [PDF]
P. P. Nikhil Raj, P. A. Azeez
Open Journal of Modern Hydrology (OJMH) , 2012, DOI: 10.4236/ojmh.2012.24011
Abstract: Baseline morphometric information at a sub basin level is essential to develop appropriate strategy for sustainable, socially acceptable, ecologically benign and economically viable development of a river basin. The present study was carried out in one of the less studied Bharathapuzha river basin (BRB), the second longest river in the state of Kerala, India. The annual discharge of the river is 3.94 km3. Nevertheless the basin, which receives about 1828 mm of annual rainfall, in recent years has been facing dearth of water. We used GIS and RS tools to study the morphometric characteristics of the basin. The seventh order main river is formed by several lower order streams forming a dentritic flow pattern. Basin geology, slope and rainfall pattern in the basin determine the morphometric characteristics of the basin. The linear aspects of the basin including stream length ratio and bifurcation ratio indicate the role of relief in the basin while the areal ratios indicate the elongate nature of the basin.
Dielectric Property Studies of Biologically Compatible Brushite Single Crystals Used as Bone Graft Substitute  [PDF]
M. P. Binitha, P. P. Pradyumnan
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2013, DOI: 10.4236/jbnb.2013.42016

The electrical characterization of bone is essential for the better understanding of the role of electrical stimulation in bone remodeling. Calcium Hydrogen Phosphate Dihydrate or brushite (CaHPO4 2H2O) has been used in bone substitution owing to their fast resorption under physiological condition. Brushite is a suitable matrix for osteoconductive bone grafts. In this work, Calcium Hydrogen Phosphate single crystals have been grown by single diffusion gel growth technique. The powder XRD studies revealed the monoclinic structure of the grown crystals. The vibrational analysis of the crystals is done with FTIR spectroscopy and the major functional groups and their assigned vibrations are discussed. The frequency dependence of dielectric constant and ac conductivity at different temperatures have been studied in detail. This study shows decrease in the dielectric constant with the increase in frequency and temperature. The variation of ac conductivity is found to be increasing with frequency and decreasing with temperature.

How to Introduce the Basis of Algorithmics? Thanks to the Enumeration and Composition of All Riffle Shuffles from a N Card Deck Used in MathMagic  [PDF]
P. Schott
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.34082
Abstract: Why use magic for teaching combinatory, algorithms and finally informatics basis as tables, control structure, loops and recursive function? Magicians know that once the surprise has worn off, the audience will seek to understand how the trick works. The aim of every teacher is to interest their students, and a magic trick will lead them to ask ‘how?’ and ‘why?’ and ‘how can I create one myself?’ In this article we consider a project I presented in 2009, the subject of which was ‘How many riffle shuffles does exist from a N card deck? Find the composition of each possible riffle shuffle’. The aim of the paper is not only to describe the project scope, the students’ theoretical studies, their approach to this problem and their computer realizations, but also to give ideas for a course or project using pedagogy. That is why only remarkable students’ realizations are shown. In order to complete the given project, the students must answer three steps: the first one is to answer to the following question: “how can I find all possible riffle shuffles with few cards? (for exe*ample 3, 4 or 5 cards) the second one (to go further ) is to answer to the following question “how can I generalize this solution through an algorithm?” the last one (to obtain the results!) is to program the algorithm with a recursive and a non-recursive solution). Each step of the Matlab? solution code is associated with an informatics basis. Whatever the student's professional ambitions, they will be able to see the impact that originality and creativity have when combined with an interest in one’s work. That’s why, two ameliorations of the ‘basic’ algorithm are proposed and a study of the gain thanks to these ameliorations is done. The students know how to “perform” a magic trick for their family and friends thanks to the use of riffle shuffle in Gilbreath’s principles, a trick that they will be able to explain and so enjoy a certain amount of success with. Sharing a mathematical/informatics demonstration is not easy and the fact that they do so means that they will have worked on and understood and are capable of explaining this knowledge. Isn’t this the aim of all teaching?
Teaching Transferable Skills to Doctoral Level Engineers—The Challenge and the Solutions  [PDF]
P. Kapranos
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.25014
Abstract: At Sheffield University, we designed a “Skills Diploma” that supports and certifies our graduates in the areas of Transferable Skills. The Diploma in Personal and Professional Skills for Centers of Doctoral Training (CDT’s) has been built into the 4-year PhD scheme in the following format: Part of the Diploma in Year one provides training in essential personal effectiveness skills to enable students to carry out their PhD research projects; training covers skills such as networking, communication & presentation, motivation, assertiveness, project and time management and creative thinking and later in Year three, students build on the personal skills training delivered in year one and focus on professional skills required in business and industry. Students record their reflections and development in their Personal Development Planning (PDP) log supported by in-class and on line tutorials. A “blended learning” teaching approach is adopted with interactive sessions, including work in small groups, short presentations, individual reflection, plenary discussions and structured tasks. Students are encouraged to take a reflective approach to their learning and to identify their own additional training needs. A very important part of their learning experience is
the SME Project where groups of students have to solve “real” problems and present their solutions within two working weeks. The teaching strategies and methods, learning objectives, assessment and feedback have all been constructively aligned within a flexible curriculum and we believe that the approach outlined above represents a paradigm shift in training tomorrow’s leaders for UK industry.


In Vitro Inhibitory Activity of the Leaf Methanol Extract of Green Tea (Camellia sinensis) against Lactococcus garvieae and Aeromonas hydrophila Isolated of Rainbow Trout (Oncorhynchus mykiss)  [PDF]
P. Akbary
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.412091
Abstract: Camellia sinensis Linn is a well-known medical herb that grows in various parts of the world. In the current study, the antimicrobial activity of methanol extract from C. sinensis leaves against Lactococcus garvieae and Aeromanas hydrophila isolated from rainbow trout (Oncorhynchus mykiss) was investigated. The growth inhibitory effects of green tea extract was determined by disc diffusion method (3 times on different days), minimum inhibitory concentration (MIC) using serial dilution and minimum bactericidal concentration (MBC). For the L. garvieae and A. hydrophila, the zone diameter inhibition (ZDI) of extract ranged 2.30 - 16.5 mm. The highest ZDI (16.50 ± 1.12 mm) for L. garvieae was observed at 100 mgml-1 and for A. hydrophila (16.20 ± 0.95 mm) at 250 mgml
Hall Effects on Unsteady MHD Three Dimensional Flow through a Porous Medium in a Rotating Parallel Plate Channel with Effect of Inclined Magnetic Field  [PDF]
P. Sulochana
American Journal of Computational Mathematics (AJCM) , 2014, DOI: 10.4236/ajcm.2014.45034
Abstract: In this paper, we make an initial value investigation of the unsteady flow of incompressible viscous fluid between two rigid non-conducting rotating parallel plates bounded by a porous medium under the influence of a uniform magnetic field of strength H0 inclined at an angle of inclination α with normal to the boundaries taking hall current into account. The perturbations are created by a constant pressure gradient along the plates in addition to the non-torsional oscillations of the upper plate while the lower plate is at rest. The flow in the porous medium is governed by the Brinkman’s equations. The exact solution of the velocity in the porous medium consists of steady state and transient state. The time required for the transient state to decay is evaluated in detail and the ultimate quasi-steady state solution has been derived analytically. Its behaviour is computationally discussed with reference to the various governing parameters. The shear stresses on the boundaries are also obtained analytically and their behaviour is computationally discussed.
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