Fourier descriptors
Fourier Descriptors Based on the Structure of the Human Primary Visual Cortex with Applications to Object Recognition
... four Fourier descriptors over the semidiscrete roto-translation group SE(2, N ...these Fourier descrip- tors to roto-translation invariant object recognition, in- spired by some neurophysiological ...
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A robust parametric active contour based on Fourier descriptors
... This paper presents an optimal parametric active contour method based on Fourier descriptors to detect and track a contour from a sequence of images in real-time. The advan- tage of this approach is that ...
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Modeshapes recognition using Fourier descriptors: a simple SHM example
... For aeronautical structures, a field where this problem has been quite studied, the components have to undergo low energy impacts caused by dropped tools, mishandling during assembly and maintenance, and in-service ...
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Modeshapes recognition using Fourier descriptors: a simple SHM example
... 1. Introduction For aeronautical structures, a field where this problem has been quite studied, the components have to undergo low energy impacts caused by dropped tools, mishandling during assembly and maintenance, and ...
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Texture Classification with Generalized Fourier Descriptors in Dimensionality Reduction Context: an Overview Exploration
... Motion descriptors (MD) or Generalized Fourier Descriptors (GFD) [7] which provide well-proven robust features in complex areas of pattern recognition (faces, objects, forms) [8], we propose to ...
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Generic Fourier Descriptors for Autonomous UAV Detection
... We assume that a moving object detecting background subtraction algorithm is continuously used and detected blobs’ binary silhouette is examined with the Generic Fourier Descriptor GFD b[r] ...
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Aggregating local image descriptors into compact codes
... Preprint: Author version. accuracy, its efficiency and the memory usage. The last two are related [11], as search efficiency can be approximated by the amount of memory visited during the search. Most similar to our work ...
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Fourier Based Adaptive Waveform
... called Fourier-based adaptive waveform (FAW), which adapts the time-frequency tiling of the modulated signal to the frequency fading properties of the en- ...
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Fourier Depth of Field
... In image space, we exploit the blurriness of out-of-focus regions by downsampling them: we compute the final image color for only a subset of the pixels and interpolate. Our motivation for adaptive sampling of the lens ...
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Fourier optics: basic concepts
... light, Fourier optics is a powerful tool allowing the esti- mation of a visible-range imaging system to transfer the spatial frequency components of an ...the Fourier optics and we review the mathematical ...
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La transformée de Fourier de la gaussienne généralisée
... Au cours des dernieres annees la fonction appelee gaussienne generalisee GG a ete large- ment utilisee dans des domaines tels que la vision par ordinateur [27], le traitement d'image [1[r] ...
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Modèles microscopiques pour la loi de Fourier
... de Fourier à partir de la dynamique microscopique ...de Fourier dans un et deux ...de Fourier soit vraie mais on ne sait pas encore sous quelles ...
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espaces de hilbert et série de fourier
... de Fourier f : kS n (f ) − f k 2 → ...de Fourier diverge en certains points, donc ne peut converger uniform´ ement vers f (la convergence au sens de l’espace C(T) est la convergence uniforme sur [0, 2π], ...
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Surface plasmon Fourier optics
... V. CONCLUSION The purpose of this work is to clarify several issues re- garding surface plasmons on flat surfaces. The first issue deals with the mode representation of the surface plas- mon field. We have shown that a ...
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Satellite image retrieval with pattern spectra descriptors
... Abstract—The increasing volume of Earth Observation data calls for appropriate solutions in satellite image retrieval. We address this problem by considering morphological descrip- tors called pattern spectra. Such ...
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Invariant image descriptors and affine morphological scale-space
... point. Descriptors of interest point vicinities are compared for this ...these descriptors should capture the invariant information that per- mits to match the corresponding interest points, whatever the ...
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Integrated photometric descriptors for lighting quality research & recommendations
... photometric descriptors might work: We need definitions of visual fields, a variety of important viewing locations and scenes for each ...photometric descriptors could be calculated for lighting ...
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Classification of biological cells using bio-inspired descriptors
... The basic idea is to compute features inspired from the visual system model and specially from the main characteristics of the retina processing. Such descriptor is well adapted in the case of our cells images since the ...
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Short Local Descriptors from 2D Connected Pattern Spectra
... Both the number of categories and the number of examples per category influence the performance. To investigate the influence of decreasing only the number of examples, we repeated the experi- ments on subsets of ...
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Descriptors of Posidonia oceanica meadows: Use and application
... the descriptors used to assess the good ecological status of Posidonia ecosystem, systematic data collection are chosen, using the same set of questions to each people (Weller and Romney, ...itself. ...
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