scispace - formally typeset
Search or ask a question
Topic

Hartley transform

About: Hartley transform is a research topic. Over the lifetime, 2709 publications have been published within this topic receiving 79944 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: A new architecture is proposed that encodes a primary image to white noise based on iterative fractional Fourier transform that can provide additional keys for encryption to make the code more difficult to break.

174 citations

Journal ArticleDOI
TL;DR: A new method for image encryption based on Hartley transforms that is a real transform and can be realized by spatially incoherent or coherent illumination is proposed and computer simulations prove it is possible.
Abstract: We propose a new method for image encryption based on Hartley transforms that is a real transform and can be realized by spatially incoherent or coherent illumination. The proposed optical implementation is based on a Michelson-type interferometer in which the pure random intensity is distributed at the Hartley plane in encryption. Computer simulations prove it is possible. A Hartley hologram method is also given and described to resolve the sign ambiguity problem that would be encountered in image reconstruction.

173 citations

Journal ArticleDOI
TL;DR: An efficient Walsh transform computation algorithm is derived which is analogous to the Cooley-Tukey algorithm for the complex-exponential Fourier transform.
Abstract: The discrete, orthogonal Walsh functions can be generated by a multiplicative iteration equation. Using this iteration equation, an efficient Walsh transform computation algorithm is derived which is analogous to the Cooley-Tukey algorithm for the complex-exponential Fourier transform.

172 citations

Journal ArticleDOI
TL;DR: In this article, a new method for image encryption using fractional Fourier transform and chaos theory is proposed, where the input image is combined with the first random phase mask at the object plane and is then transformed using the FFT transform.

171 citations

Journal ArticleDOI
TL;DR: The well-known Shannon sampling theorem and previously developed sampling criteria for Fresnel and fractional Fourier transformed signals are shown to be a special cases of the theorem developed here.

170 citations


Network Information
Related Topics (5)
Nonlinear system
208.1K papers, 4M citations
81% related
Image processing
229.9K papers, 3.5M citations
80% related
Optimization problem
96.4K papers, 2.1M citations
79% related
Feature extraction
111.8K papers, 2.1M citations
78% related
Matrix (mathematics)
105.5K papers, 1.9M citations
77% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202311
202230
202110
202014
201915
201820