نتایج جستجو برای: interpolated dft

تعداد نتایج: 23852  

1997
Lauri Savioja Vesa Välimäki

The digital waveguide mesh is an extension of the one-dimensional digital waveguide technique. Waveguide meshes are used for simulation of two-and three-dimensional wave propagation in musical instruments and acoustic spaces. The original waveguide mesh algorithm suffers from direction-dependent dispersion. In this paper we show that this problem may be reduced by using an interpolated rectilin...

Journal: :Journal of experimental psychology. Learning, memory, and cognition 2013
Jeffrey Annis Kenneth J Malmberg Amy H Criss Richard M Shiffrin

Recognition memory accuracy is harmed by prior testing (a.k.a., output interference [OI]; Tulving & Arbuckle, 1966). In several experiments, we interpolated various tasks between recognition test trials. The stimuli and the tasks were more similar (lexical decision [LD] of words and nonwords) or less similar (gender identification of male and female faces) to the stimuli and task used in recogn...

2005
Matteo Fischetti Cristiano Saturni

We analyze a separation procedure for Mixed-Integer Programs related to the work of Gomory and Johnson on interpolated subadditive functions. This approach has its roots in the Gomory-Johnson characterization on the master cyclic group polyhedron. To our knowledge, the practical benefit that can be obtained by embedding interpolated subadditive cuts in a cutting plane algorithm was not investig...

Journal: :Trans. GIS 2010
Alex Daniels Denis J. Dean

In this study we compare two methods of interpolating simple metrics from polygons that change over time. Conventional methodology involves computing values of the metrics at points in time where the polygon is observed, and interpolating between these observed values to estimate values at other points in time. An alternative method applies interpolation techniques to the locations of vertices ...

2005
Wilson Fung Akiomi Kunisa

This paper proposes an RST−invariant multi−bit watermarking system based on LPM and DFT. This system embeds the watermark in a rotation and translation invariant domain obtained by first acquiring log−polar mapped DFT (LPM−DFT) magnitudes of an image, and then taking the magnitude of the 1−dimensional DFT along the angular axis of this LPM−DFT magnitudes. Neither the original cover image nor a ...

2014
Heath D. Watts Lorena Tribe James D. Kubicki

A review of the literature about calculating the adsorption properties of arsenic onto mineral models using density functional theory (DFT) is presented. Furthermore, this work presents DFT results that show the effect of model charge, hydration, oxidation state, and DFT method on the structures and adsorption energies for As and As onto Fe-(oxyhydr)oxide cluster models. Calculated interatomic ...

2000
ALBA PEREZ MICHAEL MCCARTHY

This paper presents a synthesis procedure for a two-degreeof-freedom spatial RR chain to reach an arbitrary end-effector trajectory. Spatial homogeneous transforms are mapped to 4× 4 rotations and interpolated as double quaternions. Each set of three spatial positions obtained from the interpolated task is used to define an RR chain. The RR chain that best fits the trajectory is the desired rob...

1994
Derek T. Puff David Eberly Stephen M. Pizer

We propose an object-based interpolation that utilizes the core, a multiscale representation of object shape, as the basis for determining an interpolated object's position and intensities. The core calculations are made directly from image intensities, with no intermediate location of object boundaries. The core of the interpolated object is first determined by an interpolation of the cores of...

Journal: :Journal of experimental psychology. General 2005
Alinda Friedman Marcia L Spetch Anne Ferrey

Humans and pigeons were trained to discriminate between 2 views of actual 3-D objects or their photographs. They were tested on novel views that were either within the closest rotational distance between the training views (interpolated) or outside of that range (extrapolated). When training views were 60 degrees apart, pigeons, but not humans, recognized novel views of actual objects better th...

1999
Thomas D. Kite Brian L. Evans Alan C. Bovik

|We present raster image processing algorithms for rehalftoning error di used halftones and producing interpolated error di used halftones. Rehalftoning converts a halftone created by one method into one created by another method. In interpolated halftoning, interpolation increases the image size before halftoning, e.g. for printing. Both rehalftoning and interpolated halftoning introduce blur ...

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