Direct manipulation of generalized cylinders based on B-spline motion

Chang, Tae-Ick; Lee, Joo-Haeng; Kim, Myung-Soo; Hong, Sung Je

doi:10.1007/s003710050137

Cited by 23 publications

(19 citation statements)

References 16 publications

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“…We will now show how to fit a generic sweep-based model 3,8,10,11 to a simple target shape. We start with a generic model represented by sweeps, a target shape represented by photographs or range-scanned data, and user-specified features which will establish the correspondence between the generic model and the target shape.…”

Section: Sweep-based Shape Adaptationmentioning

confidence: 99%

Human hand adaptation using sweeps: generating animatable hand models

Lee¹,

Kim

2007

Computer Animation & Virtual

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We introduce a sweep-based hand shape adaptation algorithm to fit a generic sweep-based hand model to the shape of an individual's hand, presented as a single photograph. The sweep trajectory curves of the generic hand model are modified to interpolate a sequence of keyframes determined by target features. Details of the real hand can be transferred to the model by adjusting its sweep displacement map. Palm lines are also acquired from sketches drawn on the photograph. The bespoke model inherits the fully animatable structure of the generic model. We demonstrate the effectiveness of our sweep-based approach using several examples of reconstructing animatable bespoke hand models.

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Section: Sweep-based Shape Adaptationmentioning

confidence: 99%

Human hand adaptation using sweeps: generating animatable hand models

Lee¹,

Kim

2007

Computer Animation & Virtual

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“…Their sweeping technique is based on a moving Frenet frame. Chang et al 7 proposed more flexible sweeping techniques based on motions described by B-splines. Hyun et al 4 presented a human body deformation technique using multiple sweeps.…”

Section: Previous Workmentioning

confidence: 99%

Realistic human hand deformation

Lee¹,

Yoon²,

Kim³

2006

Computer Animation & Virtual

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We present a new approach to realistic hand modeling and deformation with real-time performance. We model the underlying shape of a human hand by means of sweeps which follow a simplified skeleton. The resulting swept surfaces are blended, and an auxiliary surface is then bound to the swept representation in the palm region. In the areas of this palm-control surface where bulges occur in certain poses of a real hand, the vertices are given their own trajectories, so that the palm forms realistic shapes as the joints bend. Palm lines can also be modeled as valleys in the skin by sketching them on a displacement map on the palm-control surface, and activitating them when appropriate joint movements take place. Self-intersections and collisions are detected using geometric primitives that are automatically generated from, and deform with, the sweeps and palm surface. Our algorithm runs in real time, and the naturalism of its results are demonstrated by comparative images of modeled and real hands, including several challenging poses.

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“…These volumes are also known as generalized cylinders, and there exists an extensive literature discussing them, e.g. [7,8,20]. The second part reports results of isogeometric analysis which we obtained with the help of the generated NURBS volume parameterizations.…”

Section: Introductionmentioning

confidence: 99%

Swept Volume Parameterization for Isogeometric Analysis

Aigner

Heinrich

Jüttler

et al. 2009

Lecture Notes in Computer Science

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Abstract. Isogeometric Analysis uses NURBS representations of the domain for performing numerical simulations. The first part of this paper presents a variational framework for generating NURBS parameterizations of swept volumes. The class of these volumes covers a number of interesting free-form shapes, such as blades of turbines and propellers, ship hulls or wings of airplanes. The second part of the paper reports the results of isogeometric analysis which were obtained with the help of the generated NURBS volume parameterizations. In particular we discuss the influence of the chosen parameterization and the incorporation of boundary conditions.

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Direct manipulation of generalized cylinders based on B-spline motion

Cited by 23 publications

References 16 publications

Human hand adaptation using sweeps: generating animatable hand models

Human hand adaptation using sweeps: generating animatable hand models

Realistic human hand deformation

Swept Volume Parameterization for Isogeometric Analysis

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