Stephen J. Sangwine

Publication Activity (10 Years)

Years Active: 1998-2018
Publications (10 Years): 7

Top Topics

Color Texture Segmentation

Fourier Transform

Spatial And Frequency Domains

Top Venues

Appl. Math. Comput.

Signal Process.

IET Image Process.

Publications

Shagufta Yasmin, Stephen J. Sangwine
Multi-directional colour edge detector using LQS convolution. IET Image Process. 12 (7) (2018)
Peter Fletcher, Stephen J. Sangwine
The development of the quaternion wavelet transform. Signal Process. 136 (2017)
Eckhard Hitzer, Stephen J. Sangwine
Multivector and multivector matrix inverses in real Clifford algebras. Appl. Math. Comput. 311 (2017)
Shagufta Yasmin, Stephen J. Sangwine
Quaternion Linear Color Edge-Glowing Filter Using Genetic Algorithm. ACIVS (2016)
Shagufta Yasmin, Stephen J. Sangwine
Quaternion linear colour edge-sharpening filter using genetic algorithm. CEEC (2016)
Hendrik De Bie, Nele De Schepper, Todd A. Ell, K. Rubrecht, Stephen J. Sangwine
Connecting spatial and frequency domains for the quaternion Fourier transform. Appl. Math. Comput. 271 (2015)
Stephen J. Sangwine
Comments on 'A structure-preserving method for the quaternion LU decomposition in quaternionic quantum theory' by Minghui Wang and Wenhao Ma. Comput. Phys. Commun. 188 (2015)
Nicolas Le Bihan, Stephen J. Sangwine, Todd A. Ell
Instantaneous frequency and amplitude of orthocomplex modulated signals based on quaternion Fourier transform. Signal Process. 94 (2014)
Eckhard Hitzer, Stephen J. Sangwine
The Orthogonal 2D Planes Split of Quaternions and Steerable Quaternion Fourier Transformations. CoRR (2013)
Stephen J. Sangwine, Todd A. Ell
Complex and hypercomplex discrete Fourier transforms based on matrix exponential form of Euler's formula. Appl. Math. Comput. 219 (2) (2012)
Todd A. Ell, Stephen J. Sangwine
Theory of vector filters based on linear quaternion functions. EUSIPCO (2008)
Salem Said, Nicolas Le Bihan, Stephen J. Sangwine
Fast Complexified Quaternion Fourier Transform. IEEE Trans. Signal Process. 56 (4) (2008)
Todd A. Ell, Stephen J. Sangwine
Projective-space colour filters using quaternion algebra. EUSIPCO (2008)
Nicolas Le Bihan, Stephen J. Sangwine
The ℍ-analytic signal. EUSIPCO (2008)
Daniel J. Alfsmann, Heinz G. Göckler, Stephen J. Sangwine, Todd A. Ell
Hypercomplex algebras in digital signal processing: Benefits and drawbacks. EUSIPCO (2007)
Todd A. Ell, Stephen J. Sangwine
Quaternion involutions and anti-involutions. Comput. Math. Appl. 53 (1) (2007)
Salem Said, Nicolas Courty, Nicolas Le Bihan, Stephen J. Sangwine
Exact Principal Geodesic Analysis for data on SO(3). EUSIPCO (2007)
Todd A. Ell, Stephen J. Sangwine
Hypercomplex Fourier Transforms of Color Images. IEEE Trans. Image Process. 16 (1) (2007)
Nicolas Le Bihan, Stephen J. Sangwine
Jacobi method for quaternion matrix singular value decomposition. Appl. Math. Comput. 187 (2) (2007)
Stephen J. Sangwine, Nicolas Le Bihan
Hypercomplex analytic signals : Extension of the analytic signal concept to complex signals. EUSIPCO (2007)
Stephen J. Sangwine, Nicolas Le Bihan
Quaternion singular value decomposition based on bidiagonalization to a real or complex matrix using quaternion Householder transformations. Appl. Math. Comput. 182 (1) (2006)
Stephen J. Sangwine, Todd A. Ell
Gray-centered RGB color space. CGIV (2004)
Stephen J. Sangwine, Todd A. Ell, Barnabas N. Gatsheni
Colour-dependent linear vector image filtering. EUSIPCO (2004)
Stephen J. Sangwine, Barnabas N. Gatsheni, Todd A. Ell
Vector amplification for color-dependent image filtering. ICIP (2) (2003)
C. Eddie Moxey, Stephen J. Sangwine, Todd A. Ell
Hypercomplex correlation techniques for vector images. IEEE Trans. Signal Process. 51 (7) (2003)
Nicolas Le Bihan, Stephen J. Sangwine
Quaternion principal component analysis of color images. ICIP (1) (2003)
Stephen J. Sangwine, Barnabas N. Gatsheni, Todd A. Ell
Linear colour-dependent image filtering based on vector decomposition. EUSIPCO (2002)
Stephen J. Sangwine
Mathematical Approaches to Linear Vector Filtering of Color Images. CGIV (2002)
C. Eddie Moxey, Todd A. Ell, Stephen J. Sangwine
Hypercomplex operators and vector correlation. EUSIPCO (2002)
Todd A. Ell, Stephen J. Sangwine
Vector zone plates as test patterns for linear vector filters. ICIP (2) (2002)
C. Eddie Moxey, Stephen J. Sangwine, Todd A. Ell
Color-grayscale image registration using hypercomplex phase correlation. ICIP (2) (2002)
C. Eddie Moxey, Todd A. Ell, Stephen J. Sangwine
Vector Correlation of Color Images. CGIV (2002)
Todd A. Ell, Stephen J. Sangwine
Hypercomplex Fourier transforms of color images. ICIP (1) (2001)
Anthony J. Bardos, Stephen J. Sangwine
Virtual reality tool for visualising RGB colour space using VRML. EUSIPCO (2000)
Todd A. Ell, Stephen J. Sangwine
Hypercomplex Wiener-Khintchine Theorem with Application to Color Image Correlation. ICIP (2000)
Carolyn J. Evans, Stephen J. Sangwine, Todd A. Ell
Colour-sensitive edge detection using hypercomplex filters. EUSIPCO (2000)
Carolyn J. Evans, Stephen J. Sangwine, Todd A. Ell
Hypercomplex Color-Sensitive Smoothing Filters. ICIP (2000)
Todd A. Ell, Stephen J. Sangwine
Decomposition of 2D Hypercomplex Fourier transforms into pairs of complex fourier transforms. EUSIPCO (2000)
Stephen J. Sangwine, Todd A. Ell
Hypercomplex Auto-And-Cross-Correlation of Color Images. ICIP (4) (1999)
Stephen J. Sangwine
The Problem of Defining the Fourier Transform of a Colour Image. ICIP (1) (1998)