Results 1  10
of
11,946
Casting Curved Shadows on Curved Surfaces
 In Computer Graphics (SIGGRAPH ’78 Proceedings
, 1978
"... Shadowing has historically been used to increase the intelligibility of scenes in electron microscopy and aerial survey. Various methods have been published for the determination of shadows in computer synthesized scenes. The display of shadows may make the shape and relative position of objects i ..."
Abstract

Cited by 401 (1 self)
 Add to MetaCart
in such scenes more comprehensible; it is a technique lending vividness and realism to computer animation. To date, algorithms for the determination of shadows have been restricted to scenes constructed of planar polygons. A simple algorithm is described which utilizes Zbuffer visible surface computation
with curved surfaces
"... By Man Hee Lee and In Kyu Park* This paper addresses an imagebased method for modeling 3D objects with curved surfaces based on the nonuniform rational Bsplines (NURBS) representation. The user fits the feature curves on a few calibrated images with 2D NURBS curves using the interactive user inte ..."
Abstract
 Add to MetaCart
By Man Hee Lee and In Kyu Park* This paper addresses an imagebased method for modeling 3D objects with curved surfaces based on the nonuniform rational Bsplines (NURBS) representation. The user fits the feature curves on a few calibrated images with 2D NURBS curves using the interactive user
Curve/Curve and Curve/Surface Intersection
, 2010
"... Solving the curve/curve and curve/surface ..."
Understanding flicking on curved surfaces
 In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '12). ACM
, 2012
"... Flicking is a common interaction technique to move objects across large interactive surfaces, but little is known about its suitability for use on nonplanar, curved surfaces. Flicking consists of two stages: First, visually determining the direction in which to flick the object, then planning and e ..."
Abstract

Cited by 3 (1 self)
 Add to MetaCart
Flicking is a common interaction technique to move objects across large interactive surfaces, but little is known about its suitability for use on nonplanar, curved surfaces. Flicking consists of two stages: First, visually determining the direction in which to flick the object, then planning
Estimation of Planar Curves, Surfaces, and Nonplanar Space Curves Defined by Implicit Equations with Applications to Edge and Range Image Segmentation
, 1991
"... This paper addresses the problem of parametric representation and estimation of complex planar curves in 2D, surfaces in 3D and nonplanar space curves in 3D. Curves and surfaces can be defined either parametrically or implicitly, and we use the latter representation. A planar curve is the set o ..."
Abstract

Cited by 314 (2 self)
 Add to MetaCart
This paper addresses the problem of parametric representation and estimation of complex planar curves in 2D, surfaces in 3D and nonplanar space curves in 3D. Curves and surfaces can be defined either parametrically or implicitly, and we use the latter representation. A planar curve is the set
Iterative point matching for registration of freeform curves and surfaces
, 1994
"... A heuristic method has been developed for registering two sets of 3D curves obtained by using an edgebased stereo system, or two dense 3D maps obtained by using a correlationbased stereo system. Geometric matching in general is a difficult unsolved problem in computer vision. Fortunately, in ma ..."
Abstract

Cited by 660 (8 self)
 Add to MetaCart
A heuristic method has been developed for registering two sets of 3D curves obtained by using an edgebased stereo system, or two dense 3D maps obtained by using a correlationbased stereo system. Geometric matching in general is a difficult unsolved problem in computer vision. Fortunately
Indirect illumination on curve surfaces.
"... In this paper we suggest improved method of photon registration on curve surfaces, presented by triangulated mesh with “true” normals in mesh vertices. Such presentation is widely used for simulation the differing effects of light and color across the surface of an object (Phong shading). It was fou ..."
Abstract
 Add to MetaCart
In this paper we suggest improved method of photon registration on curve surfaces, presented by triangulated mesh with “true” normals in mesh vertices. Such presentation is widely used for simulation the differing effects of light and color across the surface of an object (Phong shading
Pleats in crystals on curved surfaces
 University of Minnesota
, 2006
"... Hexagons can easily tile a flat surface, but not a curved one. Introducing heptagons and pentagons (defects with topological charge) makes it easier to tile curved surfaces; for example, soccer balls based on the geodesic domes 1 of Buckminster Fuller have exactly 12 pentagons (positive charges). I ..."
Abstract

Cited by 1 (0 self)
 Add to MetaCart
Hexagons can easily tile a flat surface, but not a curved one. Introducing heptagons and pentagons (defects with topological charge) makes it easier to tile curved surfaces; for example, soccer balls based on the geodesic domes 1 of Buckminster Fuller have exactly 12 pentagons (positive charges
Haptic identification of curved surfaces
 Perception & Psychophysics, Vol
, 1994
"... In two experiments, the active haptic identification of threedimensional mathematically welldefined objects is investigated. The objects, quadric surfaces, are defined in terms of the shape index, a quantity describing the shape, and curvedness, a quantity describing overall curvature. Both shape i ..."
Abstract

Cited by 12 (1 self)
 Add to MetaCart
of curved surfaces by active exploration with only minor restrictions. Few studies have came close to the objectives of our
Shaping Curved Surfaces
, 1994
"... This dissertation presents a new tool for shaping curved surfaces, the bending operator. The bending operator is an interactive tool intended for use in 3D sketching. It is based on the idea that bending a surface is equivalent to changing its normal vector field while perturbing its metric as litt ..."
Abstract

Cited by 1 (0 self)
 Add to MetaCart
This dissertation presents a new tool for shaping curved surfaces, the bending operator. The bending operator is an interactive tool intended for use in 3D sketching. It is based on the idea that bending a surface is equivalent to changing its normal vector field while perturbing its metric
Results 1  10
of
11,946