منابع مشابه
Drawing with Complex Numbers
It is not commonly realized that the algebra of complex numbers can be used in an elegant way to represent the images of ordinary 3-dimensional figures, orthographically projected to the plane. We describe these ideas here, both using simple geometry and setting them in a broader context. Consider orthogonal projection in Euclidean n-space onto an m-dimensional subspace. We may as well choose c...
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In the typical population, a series of drawing strategies have been outlined, that progressively emerge during childhood. Individuals with Williams syndrome (WS), a rare genetic disorder, produce drawings that lack cohesion, yet drawing strategies in this group have hitherto not been investigated. In this study WS and TD groups drew and constructed (from pre-drawn lines and shapes) a series of ...
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In this paper, we present NPR techniques to convey important shapes in HDR images. Line drawing is important to convey shapes in an image to produce good illustrations for scientific purpose. The proposed method make use of the global tone mapping operator, 2D anisotropic filter, 2D modified coherence shock filter, weight parsing technique and bilateral filtering. Global tone mapping operator i...
متن کاملDual Space Drawing Methods for Ruled Surfaces with Particular Shapes
Ruled surface design and its applications are widely used in CAGD (Computer Aided Geometric Design) and industrial areas. The hyperbolic paraboloid, the cylinder, the cone, and the hyperboloid are ruled surfaces with particular shapes. In this paper, dual space drawing methods for these particular ruled surfaces are proposed. The underlying principles of these methods are the applications, exte...
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ژورنال
عنوان ژورنال: Experimental Brain Research
سال: 2005
ISSN: 0014-4819,1432-1106
DOI: 10.1007/s00221-005-0252-2