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TIFS
2008
200views more  TIFS 2008»
13 years 4 months ago
Color Image Watermarking Using Multidimensional Fourier Transforms
This paper presents two vector watermarking schemes that are based on the use of complex and quaternion Fourier transforms and demonstrates, for the first time, how to embed waterm...
Tsz Kin Tsui, Xiao-Ping Zhang, Dimitrios Androutso...
BMCBI
2010
134views more  BMCBI 2010»
13 years 4 months ago
Localizing triplet periodicity in DNA and cDNA sequences
Background: The protein-coding regions (coding exons) of a DNA sequence exhibit a triplet periodicity (TP) due to fact that coding exons contain a series of three nucleotide codon...
Liya Wang, Lincoln D. Stein
SODA
2003
ACM
100views Algorithms» more  SODA 2003»
13 years 5 months ago
Quantum algorithms for some hidden shift problems
Almost all of the most successful quantum algorithms discovered to date exploit the ability of the Fourier transform to recover subgroup structure of functions, especially periodi...
Wim van Dam, Sean Hallgren, Lawrence Ip
DPHOTO
2010
287views Hardware» more  DPHOTO 2010»
13 years 6 months ago
Dead leaves model for measuring texture quality on a digital camera
We describe the procedure to evaluate the image quality of a camera in terms of texture preservation. We use a stochastic model coming from stochastic geometry, and known as the d...
Frédéric Cao, Frederic Guichard, Her...
SAIG
2000
Springer
13 years 8 months ago
Code Generators for Automatic Tuning of Numerical Kernels: Experiences with FFTW
Achieving peak performance in important numerical kernels such as dense matrix multiply or sparse-matrix vector multiplication usually requires extensive, machine-dependent tuning ...
Rich Vuduc, James Demmel
CSB
2004
IEEE
131views Bioinformatics» more  CSB 2004»
13 years 8 months ago
Improved Fourier Transform Method for Unsupervised Cell-Cycle Regulated Gene Prediction
Motivation: Cell-cycle regulated gene prediction using microarray time-course measurements of the mRNA expression levels of genes has been used by several researchers. The popular...
Karuturi R. Krishna Murthy, Liu Jian Hua
CAIP
1999
Springer
145views Image Analysis» more  CAIP 1999»
13 years 8 months ago
Optimized Fast Algorithms for the Quaternionic Fourier Transform
Abstract. In this article, we deal with fast algorithms for the quaternionic Fourier transform (QFT). Our aim is to give a guideline for choosing algorithms in practical cases. Hen...
Michael Felsberg, Gerald Sommer
ICMCS
1999
IEEE
165views Multimedia» more  ICMCS 1999»
13 years 8 months ago
Template Based Recovery of Fourier-Based Watermarks Using Log-Polar and Log-Log Maps
Digital watermarks have been proposed as a method for discouraging illicit copying and distribution of copyrighted material. This paper describes a method for the secure and robus...
Shelby Pereira, Joseph Ó Ruanaidh, Fr&eacut...
EGH
2003
Springer
13 years 9 months ago
The FFT on a GPU
The Fourier transform is a well known and widely used tool in many scientific and engineering fields. The Fourier transform is essential for many image processing techniques, in...
Kenneth Moreland, Edward Angel
3DIM
2003
IEEE
13 years 9 months ago
Accuracy of 3D Range Scanners by Measurement of the Slanted Edge Modulation Transfer Function
We estimate the accuracy of a 3D range scanner in terms of its spatial frequency response. We determine a scanner’s modulation transfer function (MTF) in order to measure its fr...
Michael Goesele, Christian Fuchs, Hans-Peter Seide...