This document discusses Bezier curves and their applications. It begins with an introduction to Bezier curves, including their history and properties. It then describes different types of Bezier curves such as classical, rational, and dynamic Bezier curves. The document reviews several applications of Bezier curves in computer graphics, animation, and font design. Finally, it discusses related work using Bezier curves for tasks such as gait recognition, gesture recognition, and facial expression recognition.
A Bézier curve is a parametric curve frequently used in computer graphics and related fields. Generalizations of Bézier curves to higher dimensions are called Bézier surfaces, of which the Bézier triangle is a special case.
Bezier Curves, properties of Bezier Curves, Derivation for Quadratic Bezier Curve, Blending function specification for Bezier curve:, B-Spline Curves, properties of B-spline Curve?
A Bézier curve is a parametric curve frequently used in computer graphics and related fields. Generalizations of Bézier curves to higher dimensions are called Bézier surfaces, of which the Bézier triangle is a special case.
Bezier Curves, properties of Bezier Curves, Derivation for Quadratic Bezier Curve, Blending function specification for Bezier curve:, B-Spline Curves, properties of B-spline Curve?
Evaluators provide a way to specify points on a curve or surface (or part of one) using only the control points. The curve or surface can then be rendered at any precision. In addition, normal vectors can be calculated for surfaces automatically. You can use the points generated by an evaluator in many ways - to draw dots where the surface would be, to draw a wireframe version of the surface, or to draw a fully lighted, shaded, and even textured version.
Representation of curves using cubic polynomials, Hermite form, Bezier form; Surface modelling representations and Solid modelling using B-Rep and CSG techniques are presented in this slide.
Definition of Viewing & Clipping?
Viewing pipeline
Viewing the transformation system
Several types of clipping
Cohen-Sutherland Line Clipping
Application of Clipping
Conclusion
A PRESENTATION ABOUT ENGINEERING CURVES WHICH INCLUDES BASIC CURVE DEFINITION AND DETAILS ABOUT HERMITE CURVES AND B SPLINES.
DERIVATION , EQUATION ETC.
Evaluators provide a way to specify points on a curve or surface (or part of one) using only the control points. The curve or surface can then be rendered at any precision. In addition, normal vectors can be calculated for surfaces automatically. You can use the points generated by an evaluator in many ways - to draw dots where the surface would be, to draw a wireframe version of the surface, or to draw a fully lighted, shaded, and even textured version.
Representation of curves using cubic polynomials, Hermite form, Bezier form; Surface modelling representations and Solid modelling using B-Rep and CSG techniques are presented in this slide.
Definition of Viewing & Clipping?
Viewing pipeline
Viewing the transformation system
Several types of clipping
Cohen-Sutherland Line Clipping
Application of Clipping
Conclusion
A PRESENTATION ABOUT ENGINEERING CURVES WHICH INCLUDES BASIC CURVE DEFINITION AND DETAILS ABOUT HERMITE CURVES AND B SPLINES.
DERIVATION , EQUATION ETC.
Assumptions of parametric and non-parametric tests
Testing the assumption of normality
Commonly used non-parametric tests
Applying tests in SPSS
Advantages of non-parametric tests
Limitations
This presentation describes what could be the good features, and the methods to verify a person from his hand. This uses
"Raul Sanchez-Reillo, C. Sanchez-Avila, A. Gonzalez-Marcos, Biometric identification through hand geometry measurements, IEEE Transactions on PAMI 22 (2000)" as the base.
Point Search Circle Detection (PSCD) Algorithm is
one of circle shape recognition methods, which introduced in the
field of pattern recognition and digital image processing. Because
of PSCD has some weakness points, therefore this paper aims to
determine the weakness points of PSCD and find solution for
these points, furthermore adding enhancements to the algorithm
and adding ellipse shape recognition algorithm to the recognition
process of the PSCD.
The improved algorithm is applied on image contains circle and
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shape and its radius for circle shape and both radiuses for ellipse
shape, MATLAB is used to conduct the improved algorithm.
FACE RECOGNITION ALGORITHM BASED ON ORIENTATION HISTOGRAM OF HOUGH PEAKSijaia
In this paper we propose a novel face recognition algorithm based on orientation histogram of Hough Transform Peaks. The novelty of the approach lies in utilizing Hough Transform peaks for determining the orientation angles and computing the histogram from it. For extraction of feature vectors first the images are divided into non overlapping blocks of equal size. Then for each of the blocks the orientation histograms are computed. The obtained histograms are combined to form the final feature vector set. Classification is done using k nearest neighbor classifier. The algorithm has been tested on the ORL
database, Yale B Database & the Essex Grimace Database.97% Recognition rates have been obtained for
ORL database, 100% for Yale B and 100% for Essex Grimace database
EXPERIMENTAL STUDY OF MINUTIAE BASED ALGORITHM FOR FINGERPRINT MATCHING cscpconf
In this paper, a minutiae-based algorithm for fingerprint pattern recognition and matching is proposed. The algorithm uses the distance between the minutiae and core points to determine
the pattern matching scores for fingerprint images. Experiments were conducted using FVC2002 fingerprint database comprising four datasets of images of different sources and qualities. False Match Rate (FMR), False Non-Match Rate (FNMR) and the Average Matching Time (AMT) were the statistics generated for testing and measuring the performance of the proposed algorithm. The comparative analysis of the proposed algorithm and some existing minutiae based algorithms was carried out as well. The findings from the experimental study were presented, interpreted and some conclusions were drawn.
Experimental study of minutiae based algorithm for fingerprint matchingcsandit
In this paper, a minutiae-based algorithm for fingerprint pattern recognition and matching is
proposed. The algorithm uses the distance between the minutiae and core points to determine
the pattern matching scores for fingerprint images. Experiments were conducted using
FVC2002 fingerprint database comprising four datasets of images of different sources and
qualities. False Match Rate (FMR), False Non-Match Rate (FNMR) and the Average Matching
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Nexgen Technology Address:
Nexgen Technology
No :66,4th cross,Venkata nagar,
Near SBI ATM,
Puducherry.
Email Id: praveen@nexgenproject.com.
www.nexgenproject.com
Mobile: 9751442511,9791938249
Telephone: 0413-2211159.
NEXGEN TECHNOLOGY as an efficient Software Training Center located at Pondicherry with IT Training on IEEE Projects in Android,IEEE IT B.Tech Student Projects, Android Projects Training with Placements Pondicherry, IEEE projects in pondicherry, final IEEE Projects in Pondicherry , MCA, BTech, BCA Projects in Pondicherry, Bulk IEEE PROJECTS IN Pondicherry.So far we have reached almost all engineering colleges located in Pondicherry and around 90km
Based on correlation coefficient in image matchingIJRES Journal
With the development of image technology, the application of image technology in industrial
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on similarity matching principle. This paper is going to discuss the similarity of the image matching algorithm
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velocity. In some specific circumstance, while correlation coefficient method is more simple and easy to use, the
software development cycle will be short.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...Travis Hills MN
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Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
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ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptxRASHMI M G
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Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
Salas, V. (2024) "John of St. Thomas (Poinsot) on the Science of Sacred Theol...Studia Poinsotiana
I Introduction
II Subalternation and Theology
III Theology and Dogmatic Declarations
IV The Mixed Principles of Theology
V Virtual Revelation: The Unity of Theology
VI Theology as a Natural Science
VII Theology’s Certitude
VIII Conclusion
Notes
Bibliography
All the contents are fully attributable to the author, Doctor Victor Salas. Should you wish to get this text republished, get in touch with the author or the editorial committee of the Studia Poinsotiana. Insofar as possible, we will be happy to broker your contact.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
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on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
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Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
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Toxic effects of heavy metals : Lead and Arsenicsanjana502982
Heavy metals are naturally occuring metallic chemical elements that have relatively high density, and are toxic at even low concentrations. All toxic metals are termed as heavy metals irrespective of their atomic mass and density, eg. arsenic, lead, mercury, cadmium, thallium, chromium, etc.
1. Contents
• Introduction
• Types of Bezier curve
• Applications
• Literature Review
• Problem statement
• Conclusion
• References
2. Introduction
Bezier curve were independently introduced by
P.de Casteljau and P.E. Bezier and have been
applied to a wide variety of computer-aided
design application.
“A Bezier curve is a parametric curve frequently
used in Computer graphics and related fields.”
3. Introduction…
• A system that supports users to design curves
must be:
1 Intuitive: We expect that every step.
2 Flexible: The system should provide the users
With more control for designing and editing the
shape of curve.
3 Easy: The way of creating and editing a curve
should be easy.
7. Control Points
• Polynomial coefficients a, b, c, d can be
interpreted as control points.
Where a, b, c, d have x , y ,z components each.
8. control points…
• How many control points?
• Two points define a line (1st order)
• Three points define a quadratic curve (2nd
order)
• Four points define a cubic curve (3rd order)
• k+1 points define a k-order curve
10. where i = 0, 1, 2, ... , n, and
Types of Bezier Curve
Classical Bezier curve: Classical Bezier curves use
the special case of the Bernstein polynomial
where n = 3.
11. • Now we can mathematically define a degree
three Bezier curve. Let Q(u) be such a curve:
12. Where each B3i(u) term is scaler valued in R
and the control point Pi is vector valued in R3.
In matrix form we can also write:
16. • IN general, a Bezier spline of degree k is
defined on n = k + 1 control points, where the
set of control points P = { P0, P1, . . ., Pk} forms
a control polygon with n vertices.
17. Rational Bezier Curve
The problem with just a regular point is that
there is no info on how to project it.
The rational form has advantages in that it can
represent a wide range of curves, and surfaces
Curves could be in the form of circles, ellipses,
parabolas, and hyperbolas; surfaces can be in the
form of spheres, ellipsiods,cylinders, cones,
paraboloids, hyperboloids, and hyperbolic
paraboloids
18. Rational B-Spline
• B-splines are like Bezier curves because they both
use a control polygon to define the curve, and are
helpful due to their control points’ local control of
the resulting shape. The B in B-spline stands for
”basis,” and the basis is specified by the Cox-de
Boor formula for computing the basis function.
• B-spline can be rational or non-rational,
depending on the use of homogeneous
coordinates.
19. Dynamic Bezier curve
• DBC incorporates local information within the
classical BC theory , by variably moving Bezier
points to new parametrically determined
locations between the BC point and CtrPoly ,
with the optimal value of the shifting
parameter (SP) being analytically determined
for a prescribed admissible distortion, using the
Lagrangian multiplier method.
22. Applications
1 Computer graphics: Bezier curves are widely
used in computer graphics to model smooth
curves .
2 Animation: In animation application ,such as
Adope Flash and synfig,Bezier curves are used to
Outline ,for example movement .
3 Font: TrueType fonts use Bezier splines
composed of quadratic Bezier curves.
23. Literature Review
1.Human Gait recognition using Bezier curves ,
2011.
a) Proposed Algorithm : Mean and variance
method.
b) Result : In this Rank1 report the percentage
of subjects in a set that were identified
exactly .Rank5 results report the percentage
of test subject whose actual match in the
reference database.
c) Reference : [1] pratibha mishra.
24. Literature Review Cont…
2. Motion detection with pyramid structure of
background model for intelligent surveillance
system,2012
a) Proposed Method : Bezier curve smoothing
method to reduce the noise for motion detection
based on our proposed adaptive background
model.
b) Result : In comparison , the accuracy rates
produced by similarity and F1 for the MSDE
method were 57.52% or less and 75.11% or less,
respectively.[2]
25. Literature Review Cont…
3. Gesture recognition using Bezier curve for
visualization navigation from registered 3-D
data,2003.
a) Proposed Method : For detecting skin regions to
identify hand involved in virtual object
manipulation the color image is converted to the
SCT color space to reduce lighting artifacts. Skin
pixels are selected with a minimum distance
classifier using mahalanobis distance.
b) Result : Detected the manipulating hand
correctly in 1639 of 1641 images (99.9 %).[3]
26. Literature Review Cont…
4. Smile detection via bezier curve of mouth
interest points,2013.
a) Proposed Method : In this extract points on
the mouth via Shi & Tomasi algorithm.
b) Result : Achieve accuracy up to 85 % on
Genki dataset .[4]
27. Literature Review Cont…
5. Facial Expression recognition based on Co-
ordinate and Bezier curve,2013.
a) Proposed Method : RGB/Skin tone color
algorithm .
b) Result : Once face has been identify then the
face will be converted from RGB image to
binary image . Identification of lips, eyes will be
take place according to the algorithmic
approach. The identification parts will be
converted to binary image and apply bezier
curve to identify the expression.
28. Problem Statement
Conventional biometrics like fingerprint
recognition, iris recognition ,face recognition can
not work well from a large distance. In visual
Surveillance, the distances between the cameras
and the people under surveillance are often large. In
these situation , it is almost impossible to acquire
the detailed conventional biometric information
.Unlike other biometrics, GAIT can be captured
from a distance camera, without drawing the
attention of the observed subject.
29. Objective
Proposed algorithm : This algorithm is based on
Bezier curves. The proposed gait recognition
system consists of three unit:
a) Image processing
b) Feature extraction
c) Gait recognition
33. • We select five control points from every frame
of an individual according to Figure, Here,
first point is selected to locate ankle, next is
selected to locate the toe , next is selected to
indicate the knee, next is selected to indicate
palm and last one is selected to locate
shoulder.
34. Bezier curve
• A bezier curve is represented by the function
• where N is the degree of curve (total number
of control points), Pi = (xi , yi) and Bi , N (t),
for i = 0, 1, . . . , N, are the Bernstein
polynomials of degree N, and t ϵ [0, 1].
35. Conclusion
Dynamic Bezier curve is a efficient method to fit
geographical curves. It make advantages of GAIT
Recognition using bezier curve that it solve
problem of geographical curves.
36. References
[1] Pratibha Mishra ,Human Gait Recognition
Using Bezier Curves 2011.
[2] Shih-Chia Huang , Fan-Chieh Cheng, Motion
detection with pyramid structure of background
model for intelligent surveillance systems 2012.
[3] Min C.Shin , Leonid V. Tsap , Dmitry B.
Goldgof, Gesture recognition using Bezier curves
for visualization navigation from registered 3-D
data 2003.
37. References cont…
[4] Pinky Rai , Manish Dixit , Smile Detection via
Bezier curve of Mouth Interest Points , 2013.
[5] M.Swathi , P.A Ashoka Vardini , T.Bharat
kunar , Facial Expression Recognition Based on
Co-ordinate and Bezier curves , 2013