Journal ArticleDOI
Physical aspects of the hartley transform
TLDR
The Hartley transform as discussed by the authors represents real data by real transform values, rather than complex, a feature that carries over into optical interferometry and is used for object phase determination starting from only amplitude information in the transform domain.About:
This article is published in Journal of Atmospheric and Solar-Terrestrial Physics.The article was published on 1989-09-01. It has received 13 citations till now. The article focuses on the topics: Hartley transform & Discrete Hartley transform.read more
Citations
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Journal ArticleDOI
Aspects of the Hartley transform
TL;DR: In this paper, the Hartley transform and the Fourier transform are discussed from more than one point of view, including multidimensional transforms, complex generalization, and microwave phase measurement by amplitude measurement only.
Journal ArticleDOI
Assessing the Hartley transform
TL;DR: The fast algorithm for the (real) Hartly transform is discussed in relation to the established fast algorithmFor the (complex) Fourier transform, compared by timing comparably written programs on a given machine, and the discipline of timing is discussed as an adjunct to complexity analysis.
Journal ArticleDOI
Optical Hartley transforms
TL;DR: The two-dimensional Hartley transform is of particular interest not only as a tool for analysis and processing of images and other 2D functions, but because it can be implemented optically without introducing the phase ambiguities associated with intensity-only observations of Fourier transforms as mentioned in this paper.
Journal ArticleDOI
A real spectral analysis of the deformation of a homogenous electric field over a thin bed – A Hartley transform approach
TL;DR: In this article, the deformation of a homogenous electric field caused by a long, thin inclined bed, which is of considerable importance in the exploration of ground water and minerals, is presented using the Hartley transform.
Journal ArticleDOI
Directional Hartley transform and content based image retrieval
TL;DR: The proposed CBIR algorithm using WDirHT and ODirHT is applied on AT&T face and Brodatz textures databases and results show that retrieval rate of both WDir HT and ODIRHT is better as compared to several other methods.
References
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Journal ArticleDOI
Some Aspects of Diffraction Theory and their Application to the Ionosphere
TL;DR: In this paper, the Fourier approach is extended to deal with problems of ''random'' diffraction, for which purpose the use of auto-correlation functions is introduced and explained in physical terms.
Investigation of molecular motions in supercooled liquids by Mossbauer scattering D C Champeney and F W D Woodhams Some Aspects of Diffraction Theory and their Application to the Ionosphere
J A Ratcliffe,D C Champeney +1 more
TL;DR: In this article, the Fourier approach is extended to deal with problems of ''random'' diffraction, for which purpose the use of auto-correlation functions is introduced and explained in physical terms.
Book
The Hartley transform
TL;DR: The author describes the fast algorithm he discovered for spectral analysis and indeed any purpose to which Fourier Transforms and the Fast Fourier Transform are normally applied.
Journal ArticleDOI
Diffraction from an irregular screen with applications to ionospheric problems
TL;DR: In this article, an analysis of the diffraction effects produced when a plane wave is incident upon an irregular diffracting screen, and the results are applied to the problem of the reflexion of radio waves from an ionosphere which is irregular in the horizontal plane.
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A theory of scattering by nonisotropic irregularities with application to radar reflections from the aurora
TL;DR: In this article, a model of the distribution of ionization in an aurora is developed that can explain the aspect sensitivity of radar echoes obtained at VHF during auroral activity.