Karl Skretting

Welcome to the home-page of
Karl Skretting

Biography

Karl Skretting was born in Nærbø, Norway in 1962. He is married to Anita and they live in Sandnes. Some pictures of them and their daughters, Maria and Anne, are available on the WWW.

Karl started to study signal processing at University of Stavanger (UiS) in 1996, the name then was Høgskolen i Stavanger (HiS). He received his siv.ing. (M.Sc.) degree from the Electrical and Computer Engineering Department in 1998. In 2002 he received the Ph.D. degree. Currently, he is employed as associate professor at UiS, and he is a part of the Cybernetics Group. The topics of interest are signal representation, data compression, and computer graphics.


Journal publications

  • Recursive Least Squares Dictionary Learning Algorithm (Paper in pdf-format)
    • Karl Skretting and Kjersti Engan
    • IEEE Transactions on Signal Processing, pp 2121-2130, Vol. 58 No 4, April 2010
    • Digital Object Identifier: 10.1109/TSP.2010.2040671 
    • See also the Dictionary Learning Experiments, DLE, on its page.
  • A family of iterative LS-based dictionary learning algorithms, ILS-DLA, for sparse signal representation
    • Kjersti Engan, Karl Skretting and John Håkon Husøy
    • Digital Signal Processing, Volume 17, Issue 1, January 2007, Pages 32-49
    • Science Direct
  • Texture classification using sparse frame based representations (Draft in pdf-format)
    • Karl Skretting and John Håkon Husøy
    • EURASIP Journal on Applied Signal Processing, Volume 2006 (2006), Article ID 52561, 11 pages.
    • EURASIP JASP
  • General design algorithm for sparse frame expansions (Paper in pdf-format)
    • Karl Skretting, John Håkon Husøy and Sven Ole Aase
    • Elsevier Signal Processing, Volume 86, Issue 1, Pages 117-126, January 2006
    • Science Direct
  • Optimized signal expansions for sparse representation (Paper in pdf-format)
    • Sven Ole Aase, John Håkon Husøy, Karl Skretting and Kjersti Engan
    • IEEE Transactions on Signal Processing, pp 1087-1096, Vol. 49 No 5, May 2001

Conference publications

  • Frame based texture classification by considering various spatial neighborhoods. (Paper in pdf-format)
    • Karl Skretting and John Håkon Husøy
    • NORSIG 2005, Stavanger, Norway, Sep. 22-24, 2005
    • Tapir Akademiske Forlag: Proceedings NORSIG 2005, ISBN 82-993158-7-5, pages 53-58.
    • Proceedings on CD, ISBN 82-993158-6-7
  • Detection of masses in mammograms by watershed segmentation and sparse representation using learned dictionaries. (Paper in pdf-format)
    • J. Herredsvela, K. Engan, T. O. Gulsrud and K. Skretting
    • NORSIG 2005, Stavanger, Norway, Sep. 22-24, 2005
    • Tapir Akademiske Forlag: Proceedings NORSIG 2005, ISBN 82-993158-7-5, pages 35-40.
    • Proceedings on CD, ISBN 82-993158-6-7
  • ECG compression using signal dependent frames and Matching Pursuit. (Paper in pdf-format)
    • Karl Skretting, Kjersti Engan and John Håkon Husøy
    • 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), March 18-23, 2005, Philadelphia, PA, USA.
    • Proceedings ICASSP 2005, ISBN 0-7803-9076-8 (8874-7), Volume IV pages 585-588.
  • Denoising of images using designed signal dependent frames and Matching Pursuit.
    • Kjersti Engan, Karl Skretting and John Håkon Husøy
    • 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), March 18-23, 2005, Philadelphia, PA, USA.
    • Proceedings ICASSP 2005, ISBN 0-7803-9076-8 (8874-7), Volume II pages 653-656.
  • Partial search vector selection for sparse signal representation. (Paper in pdf-format)
    • Karl Skretting and John Håkon Husøy
    • NORSIG 2003, Bergen, Norway, Oct. 2-4, 2003
    • Implementations of the algorithms are available as Matlab-files that you will find on the project page together with some relevant information.
  • Texture classification using sparse frame based representations. (Paper in pdf-format)
    • Karl Skretting and John Håkon Husøy
    • NORSIG 2002, Tromsø/Trondheim, Norway, Oct. 4-7, 2002
  • A Novel Image Denoising Technique Using Overlapping Frames. (Paper in pdf-format)
    • Kjersti Engan and Karl Skretting
    • Proc. of 2nd. IASTED Int. Conf. on Visualization, Imaging, and Image Processing, 265--270, Malaga, Spain, September, 2002
  • A simple design of sparse signal representations using overlapping frames. (Paper in pdf-format, 257 KB)
    • Karl Skretting, John Håkon Husøy and Sven Ole Aase
    • ISPA 2001, Pula, Croatia, June 19-21, 2001
  • Sparse representation of images using overlapping frames. (Paper in pdf-format, 2177 KB)
    • Karl Skretting, Kjersti Engan, John Håkon Husøy and Sven Ole Aase
    • SCIA 2001, Bergen, Norway, June 11-14, 2001.
  • Design of signal expansions for sparse representation.
    • S.O. Aase, K. Skretting, J.H. Husøy and K. Engan
    • ICASSP 2000, in Proc. Int. Conf. Acoust. Speech, Signal Proc., (Istanbul, Turkey), Jun. 2000
  • Improved Huffman coding using recursive splitting
    • Karl Skretting, John Håkon Husøy and Sven Ole Aase
    • NORSIG 1999, in Proc. of Norwegian Signal Proc. Symp., Asker, Norway, September 1999.
  • Design of general block oriented expansions for efficient signal representation.
    • J.H. Husøy, S. O. Aase, K. Skretting, and K. Engan
    • ISCAS 1999, in Proc. ISCAS, (Orlando, Fl., U.S.A), pp. III-9-12, May 1999.

Other Work

WWW links/resources

·         Teaching at HiS and UiS (in Norwegian)

    • 1999-2001 Signalbehandling lab. (TE6443 V99, V00 og V01)
    • 2002-2005 Datagrafikk. (TE0589 H02, H03 og H04, TE0523 V03 og V04, BID110 V05)
    • 2003-2007 Algoritme og kompleksitetsteori. (TE6255 H03, MID170 H04 og V07)
    • 2005-2007 Digital filtrering og koding. (MIK210 H06, canceled H05 and H07)
    • 2008-2009 Videregående signalbehandling. (MIK230 H08, H09)
    • Since 2004 Systemidentifikasjon. (TE6569 V04, MIK130 H05-11)
    • Since 2006 Anvendt signalbehandling. (MIK200 V06-12)
  • Research
    • Dictionary Learning Experiments, DLE, the latest (2009) functions for Matching Pursuit and Dictionary Learning.
    • Image Compression Tools, ICTools.
    • Sparse Signal Representation using Overlapping Frames, the previous version of Matching Pursuit Algorithms, and Matlab-files for Frame Design, i.e. Dictionary Learning.

Address

  • Office:
    University of Stavanger
    Department of Electrical and Computer Engineering
    N-4036 Stavanger
    Norway

Tel. (direct):

+47 - 51 83 20 16

Tel. (switchboard):

+47 - 51 83 10 00

Fax :

+47 - 51 83 17 50

·         Internet:

Email at UiS:

karl.skretting@uis.no

WWW homepage:

http://www.ux.uis.no/~karlsk/


Last update: November 1, 2011.