A system's architecture for warping and morphing of graphical objects

Gomes, Jonas; Darsa, Lucia; Costa, Bruno; Velho, Luiz

doi:10.1109/sibgra.1998.722750

Cited by 89 publications

(106 citation statements)

References 29 publications

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“…Most of the earlier work in the area focused on image metamorphosis, though a number of approaches have also been proposed for 3D volumetric models and 3D polyhedral models. Surveys of some of these techniques can be found in [17,29]. An extended abstract of this paper appears in [18].…”

Section: Related Workmentioning

confidence: 99%

Interactive surface decomposition for polyhedral morphing

et al. 1999

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Section: Related Workmentioning

confidence: 99%

Interactive surface decomposition for polyhedral morphing

et al. 1999

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“…Given any pair of objects so that each vertex of one object corresponds to exactly one vertex of the other object (i.e., objects with one-toone correspondence between vertices), morphing is straightforward 17,18,[27][28][29] : In this case, smooth variations (or 'morphs') between the two objects are produced by smoothly interpolating between the corresponding vertices and normals ( Figure 5). Depending on the pair of objects chosen, morphing will result in new categories or additional children within a category.…”

Section: Additional Methods Of Creating Shape Variation: Digital Morpmentioning

confidence: 99%

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Hauffen

Bart

Brady

et al. 2012

JoVE

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In order to quantitatively study object perception, be it perception by biological systems or by machines, one needs to create objects and object categories with precisely definable, preferably naturalistic, properties 1 . Furthermore, for studies on perceptual learning, it is useful to create novel objects and object categories (or object classes) with such properties 2 .Many innovative and useful methods currently exist for creating novel objects and object categories [3][4][5][6] (also see refs. 7,8). However, generally speaking, the existing methods have three broad types of shortcomings.First, shape variations are generally imposed by the experimenter 5,9,10 , and may therefore be different from the variability in natural categories, and optimized for a particular recognition algorithm. It would be desirable to have the variations arise independently of the externally imposed constraints.Second, the existing methods have difficulty capturing the shape complexity of natural objects [11][12][13] . If the goal is to study natural object perception, it is desirable for objects and object categories to be naturalistic, so as to avoid possible confounds and special cases.Third, it is generally hard to quantitatively measure the available information in the stimuli created by conventional methods. It would be desirable to create objects and object categories where the available information can be precisely measured and, where necessary, systematically manipulated (or 'tuned'). This allows one to formulate the underlying object recognition tasks in quantitative terms.Here we describe a set of algorithms, or methods, that meet all three of the above criteria. Virtual morphogenesis (VM) creates novel, naturalistic virtual 3-D objects called 'digital embryos' by simulating the biological process of embryogenesis 14 . Virtual phylogenesis (VP) creates novel, naturalistic object categories by simulating the evolutionary process of natural selection 9,12,13 . Objects and object categories created by these simulations can be further manipulated by various morphing methods to generate systematic variations of shape characteristics 15,16 . The VP and morphing methods can also be applied, in principle, to novel virtual objects other than digital embryos, or to virtual versions of realworld objects 9,13 . Virtual objects created in this fashion can be rendered as visual images using a conventional graphical toolkit, with desired manipulations of surface texture, illumination, size, viewpoint and background. The virtual objects can also be 'printed' as haptic objects using a conventional 3-D prototyper.We also describe some implementations of these computational algorithms to help illustrate the potential utility of the algorithms. It is important to distinguish the algorithms from their implementations. The implementations are demonstrations offered solely as a 'proof of principle' of the underlying algorithms. It is important to note that, in general, an implementation of a computational algorithm often has limita...

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“…Wolberg 1990, Magnenat-Thalmann & Thalmann 1990, Gomes et al 1999. Morphing is just the computerized version of a process which is historically well-known in cinematic animation, where a set of 'key frames' is generated by skilled artists, and then the process of 'in-betweening', or filling in the steps between these frames is performed by less skilled artists.…”

Section: Descriptionmentioning

confidence: 99%

Morphing the CMB: a technique for interpolating power spectra

Sigurdson

Scott

2000

New Astronomy

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The confrontation of the Cosmic Microwave Background (CMB) theoretical angular power spectrum with available data often requires the calculation of large numbers of power spectra. The standard practice is to use a fast code to compute the CMB power spectra over some large parameter space, in order to estimate likelihoods and constrain these parameters. But as the dimensionality of the space under study increases, then even with relatively fast anisotropy codes, the computation can become prohibitive. This paper describes the employment of a 'morphing' strategy to interpolate new power spectra based on previously calculated ones. We simply present the basic idea here, and illustrate with a few examples; optimization of interpolation schemes will depend on the specific application. In addition to facilitating the exploration of large parameter spaces, this morphing technique may be helpful for Fisher matrix calculations involving derivatives.

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A system's architecture for warping and morphing of graphical objects

Cited by 89 publications

References 29 publications

Interactive surface decomposition for polyhedral morphing

Interactive surface decomposition for polyhedral morphing

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Morphing the CMB: a technique for interpolating power spectra

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