Hans Jakob Rivertz
Om
Kompetanseord
Forskning
Jeg forsker / har forsket innen følgende felt.
- Aperiodiske mønstre
- Billedbehandling
- Differensialgeometri
- Fargeteori
- Kombinatorikk
- Personvern
- Multimedia
- Numerikk
- Sikkerhet
Publikasjoner
Jeg har publisert innen både matematikk of informatikk.
2023
-
Rivertz, Hans;
Mackiewicz, Michal.
(2023)
Optimised Spherical Sampling of the Object Colour Solid.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans.
(2023)
Multiset permutation generation by transpositions.
arXiv.org
Vitenskapelig artikkel
2022
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2022)
Three dimensional surface preserving smoothing.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2021
-
Alsam, Ali;
Rivertz, Hans.
(2021)
Long range diffusion with control of the directional differences.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2020
-
Rivertz, Hans Jakob.
(2020)
On filters making an imaging sensor more colorimetric.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2019
-
Mackiewicz, Michal;
Rivertz, Hans Jakob;
Finlayson, Graham.
(2019)
Spherical sampling methods for the calculation of metamer mismatch volumes.
Optical Society of America. Journal A: Optics, Image Science, and Vision (JOSA A)
Vitenskapelig artikkel
-
Rivertz, Hans Jakob;
Alsam, Ali.
(2019)
Colour to Grey by Maximum Signed Gradient.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob.
(2019)
On an Euler-Lagrange equation for color to grayscale conversion.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2019)
Improved color edge preserving smoothing.
NIKT: Norsk IKT-konferanse for forskning og utdanning
Vitenskapelig artikkel
2018
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2018)
A mathematical approach to best luminance maps.
Optical Society of America. Journal A: Optics, Image Science, and Vision (JOSA A)
Vitenskapelig artikkel
2017
-
Eschenburg, Jost-Hinrich;
Rivertz, Hans Jakob.
(2017)
The complete cartwheel tiling.
Journal of Geometry
Vitenskapelig artikkel
-
Mackiewicz, Michal;
Rivertz, Hans Jakob;
Finlayson, Graham.
(2017)
Metamer Mismatch Volumes Using Spherical Sampling.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2015
-
Rivertz, Hans Jakob.
(2015)
Self-similar aperiodic patterns with 9-fold symmetry.
Journal of Number Theory
Vitenskapelig artikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2015)
Fast scale space image decomposition.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Farup, Ivar;
Rivertz, Hans Jakob.
(2015)
Iterative sharpening for image contrast enhancement.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2014
-
Eschenburg, Jost-Hinrich;
Rivertz, Hans Jakob.
(2014)
Self similarity of dihedral tilings.
Journal of Algebra
Vitenskapelig artikkel
-
Rivertz, Hans Jakob;
Alsam, Ali.
(2014)
Drawing Parrots with Charcoal.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2013
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2013)
Color Edge Preserving Smoothing.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob;
Sharma, Puneet.
(2013)
What the eye did not see--a fusion approach to image coding.
International journal on artificial intelligence tools
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2013)
On those ordinary differential equations that are solved exactly by the improved Euler method.
Archivum mathematicum
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2013)
On real local isometric immersions of CQ^2_c into CP^3.
Journal of Geometry
Vitenskapelig artikkel
2012
-
Alsam, Ali;
Rivertz, Hans Jakob;
Sharma, Puneet.
(2012)
What the Eye Did Not See – A Fusion Approach to Image Coding.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2012)
Algebraic color to grayscale.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Røe, Per;
Arnesen, Ragni Ryvold;
Danielsson, Jerker;
Vestgården, Jørn Inge;
Rivertz, Hans Jakob;
Boudko, Svetlana.
(2012)
TrueGen 4.0 Design.
NR-notat (DART/11/2012)
Rapport
2011
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2011)
Fast Edge Preserving Smoothing Algorithm.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2011)
Constrained Gradient Integration for Improved Image Contrast.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob.
(2011)
On local isometric immersions into complex and quaternionic projective spaces.
Archivum mathematicum
Vitenskapelig artikkel
2009
-
Rivertz, Hans Jakob.
(2009)
On an invariant on isometric immersions into spaces of constant sectional curvature.
Ukrainian Mathematical Journal
Vitenskapelig artikkel
2007
-
Rivertz, Hans Jakob;
Eschenburg, Jost-Hinrich.
(2007)
Self similar symmetric planar tilings.
Journal of Geometry
Vitenskapelig artikkel
2005
-
Danielsson, Jerker;
Groven, Arne-Kristian;
Kristoffersen, Thor;
Rivertz, Hans Jakob;
Skomedal, Åsmund.
(2005)
Elektroniske spor.
Rapport
-
Østvold, Bjarte M.;
Rivertz, Hans Jakob.
(2005)
Performance evaluation of the Velocity Database Engine.
Rapport
-
Rivertz, Hans Jakob.
(2005)
Bluetooth security.
Rapport
2004
-
Boudko, Svetlana;
Rivertz, Hans Jakob.
(2004)
The NR JPEG 2000-codec.
NR-notat (DART/08/04)
Rapport
-
Kristoffersen, Thor;
Vestgården, Jørn Inge;
Rivertz, Hans Jakob.
(2004)
Design and Implementation of the Channel-S Streaming System.
NR-notat (DART/07/04)
Rapport
2003
-
Aredo, Demissie;
Rivertz, Hans Jakob;
Vestgården, Jørn Inge.
(2003)
LBS System Architecture with Privacy.
Ukjent
Vitenskapelig artikkel
2002
-
Arnesen, Ragni Ryvold;
Huseby, Ragnar Bang;
Rivertz, Hans Jakob;
Røe, Per;
Snekkenes, Einar;
Vestgården, Jørn Inge.
(2002)
Replacement of random number generator in Norsk Tipping's random number draw system.
NR-notat (GEM/02/02)
Rapport
2001
-
Arnesen, Ragni Ryvold;
Aredo, Demissie;
Huseby, Ragnar Bang;
Rivertz, Hans Jakob;
Rue, Håvard;
Snekkenes, Einar.
(2001)
Random Number Draw System - Design.
Norsk Regnesentral
Rapport
1996
-
Rivertz, Hans Jakob;
Tomter, Per.
(1996)
Stability of geodesic spheres.
World Scientific
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Tidsskriftspublikasjoner
-
Rivertz, Hans.
(2023)
Multiset permutation generation by transpositions.
arXiv.org
Vitenskapelig artikkel
-
Mackiewicz, Michal;
Rivertz, Hans Jakob;
Finlayson, Graham.
(2019)
Spherical sampling methods for the calculation of metamer mismatch volumes.
Optical Society of America. Journal A: Optics, Image Science, and Vision (JOSA A)
Vitenskapelig artikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2019)
Improved color edge preserving smoothing.
NIKT: Norsk IKT-konferanse for forskning og utdanning
Vitenskapelig artikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2018)
A mathematical approach to best luminance maps.
Optical Society of America. Journal A: Optics, Image Science, and Vision (JOSA A)
Vitenskapelig artikkel
-
Eschenburg, Jost-Hinrich;
Rivertz, Hans Jakob.
(2017)
The complete cartwheel tiling.
Journal of Geometry
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2015)
Self-similar aperiodic patterns with 9-fold symmetry.
Journal of Number Theory
Vitenskapelig artikkel
-
Eschenburg, Jost-Hinrich;
Rivertz, Hans Jakob.
(2014)
Self similarity of dihedral tilings.
Journal of Algebra
Vitenskapelig artikkel
-
Alsam, Ali;
Rivertz, Hans Jakob;
Sharma, Puneet.
(2013)
What the eye did not see--a fusion approach to image coding.
International journal on artificial intelligence tools
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2013)
On those ordinary differential equations that are solved exactly by the improved Euler method.
Archivum mathematicum
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2013)
On real local isometric immersions of CQ^2_c into CP^3.
Journal of Geometry
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2011)
On local isometric immersions into complex and quaternionic projective spaces.
Archivum mathematicum
Vitenskapelig artikkel
-
Rivertz, Hans Jakob.
(2009)
On an invariant on isometric immersions into spaces of constant sectional curvature.
Ukrainian Mathematical Journal
Vitenskapelig artikkel
-
Rivertz, Hans Jakob;
Eschenburg, Jost-Hinrich.
(2007)
Self similar symmetric planar tilings.
Journal of Geometry
Vitenskapelig artikkel
-
Aredo, Demissie;
Rivertz, Hans Jakob;
Vestgården, Jørn Inge.
(2003)
LBS System Architecture with Privacy.
Ukjent
Vitenskapelig artikkel
Del av bok/rapport
-
Rivertz, Hans;
Mackiewicz, Michal.
(2023)
Optimised Spherical Sampling of the Object Colour Solid.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2022)
Three dimensional surface preserving smoothing.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans.
(2021)
Long range diffusion with control of the directional differences.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob.
(2020)
On filters making an imaging sensor more colorimetric.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob;
Alsam, Ali.
(2019)
Colour to Grey by Maximum Signed Gradient.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob.
(2019)
On an Euler-Lagrange equation for color to grayscale conversion.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Mackiewicz, Michal;
Rivertz, Hans Jakob;
Finlayson, Graham.
(2017)
Metamer Mismatch Volumes Using Spherical Sampling.
The Society for Imaging Science and Technology
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2015)
Fast scale space image decomposition.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Farup, Ivar;
Rivertz, Hans Jakob.
(2015)
Iterative sharpening for image contrast enhancement.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob;
Alsam, Ali.
(2014)
Drawing Parrots with Charcoal.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2013)
Color Edge Preserving Smoothing.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob;
Sharma, Puneet.
(2012)
What the Eye Did Not See – A Fusion Approach to Image Coding.
Springer
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2012)
Algebraic color to grayscale.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2011)
Fast Edge Preserving Smoothing Algorithm.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Alsam, Ali;
Rivertz, Hans Jakob.
(2011)
Constrained Gradient Integration for Improved Image Contrast.
ACTA Press
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Rivertz, Hans Jakob;
Tomter, Per.
(1996)
Stability of geodesic spheres.
World Scientific
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Rapport
-
Røe, Per;
Arnesen, Ragni Ryvold;
Danielsson, Jerker;
Vestgården, Jørn Inge;
Rivertz, Hans Jakob;
Boudko, Svetlana.
(2012)
TrueGen 4.0 Design.
NR-notat (DART/11/2012)
Rapport
-
Danielsson, Jerker;
Groven, Arne-Kristian;
Kristoffersen, Thor;
Rivertz, Hans Jakob;
Skomedal, Åsmund.
(2005)
Elektroniske spor.
Rapport
-
Østvold, Bjarte M.;
Rivertz, Hans Jakob.
(2005)
Performance evaluation of the Velocity Database Engine.
Rapport
-
Rivertz, Hans Jakob.
(2005)
Bluetooth security.
Rapport
-
Boudko, Svetlana;
Rivertz, Hans Jakob.
(2004)
The NR JPEG 2000-codec.
NR-notat (DART/08/04)
Rapport
-
Kristoffersen, Thor;
Vestgården, Jørn Inge;
Rivertz, Hans Jakob.
(2004)
Design and Implementation of the Channel-S Streaming System.
NR-notat (DART/07/04)
Rapport
-
Arnesen, Ragni Ryvold;
Huseby, Ragnar Bang;
Rivertz, Hans Jakob;
Røe, Per;
Snekkenes, Einar;
Vestgården, Jørn Inge.
(2002)
Replacement of random number generator in Norsk Tipping's random number draw system.
NR-notat (GEM/02/02)
Rapport
-
Arnesen, Ragni Ryvold;
Aredo, Demissie;
Huseby, Ragnar Bang;
Rivertz, Hans Jakob;
Rue, Håvard;
Snekkenes, Einar.
(2001)
Random Number Draw System - Design.
Norsk Regnesentral
Rapport
Undervisning
Emner
Formidling
2016
-
PosterFinlayson, Graham; Mackiewicz, Michal; Rivertz, Hans Jakob. (2016) Computing the object colour solid using spherical sampling. Progress in Colour Studies PICS 2016 , University College London 2016-09-14 - 2016-09-16
2011
-
Vitenskapelig foredragAlsam, Ali; Rivertz, Hans Jakob. (2011) Fast edge preserving smoothing algorithm. IASTED Signal and Image Processing - SIP 2011 , Dallas 2011-12-14 - 2011-12-16
-
Vitenskapelig foredragAlsam, Ali; Rivertz, Hans Jakob. (2011) Constrained gradient integration for improved image contrast. IASTED Signal and Image Processing (SIP 2011) , Dallas 2011-12-14 - 2011-12-16