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GeoFilter: Geometric Selection of Mesh Filter Parameters
Author(s) -
Kim ByungMoon,
Rossignac Jarek
Publication year - 2005
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/j.1467-8659.2005.00854.x
Subject(s) - atlanta , computer science , selection (genetic algorithm) , citation , computer graphics (images) , library science , information retrieval , artificial intelligence , history , metropolitan area , archaeology
When designing a lowpass filter to eliminate noise in a triangle mesh, the cutoff frequency is typically chosen by a cumbersome trial-and-error process. Therefore, it is important to provide a guideline in selectingfilter frequencies. Here, we explore the relation between the frequencies in a mesh filter and the geometric measures of user-selected features. In addition, by combining previously proposed implicit and explicit formulations, we develop a second order filter that can act as lowpass, bandpass, highpass, notch, and band exaggeration/reduction filters. The proposed GeoFilter framework allows the user to choose the frequencies for that filter based on the physical size of a blob (ellipsoid) automatically fit to a user-selected feature in the mesh. For example, the size of a bump in a noisy pattern can be used as a cutoff frequency in a lowpass filter, while the size of a nose may be used to smoothen a face or to exaggerate its features as in a caricature.