Et profilbilde

Professor
Kjersti Engan { "honorific-suffix": "Professor", "fn": "Kjersti Engan", "tel": "Telefon: 5183 2008", "email": "kjersti.engan@uis.no" }

Avdeling/enhet Det teknisk- naturvitenskapelige fakultet
Institutt/senter Institutt for data- og elektroteknikk
Rom KE E-423E

Kjersti Engan was born in Bergen, Norway, in 1971. I received the Ing. (B.E.) degree in electrical engineering from Bergen University College in 1994 and the Siv.Ing. (M.Sc.) and Dr.Ing. (Ph.D.) degrees in 1996 and 2000 respectively, both in electrical engineering from the University of Stavanger, Stavanger, Norway.  I am currently a full professor with the department of Electrical Engineering and Computer Science at University of Stavanger (UiS), Norway.  I am a part of the Biomedical data analysis group at UiS. 


Forskningsområder

My research interests are in signal and image processing, and especially: 

- Biomedical signal and image processing, analysis and classification.   I am involved in several projects in collaboration with the local hospital and local companies in areas such as; Analysis, classification and segmentation in Cardiac MR on infarct patients and Brain MRI on dementia patients, analysis and classification on ECG of cardiac arrest patients, analysis and classification on ECG and ventilation signals of newborn

- Sparse signal and image representation, with a special interest in dictionary learning.  The dictionaries can be used for different applications such as compression, denoising and texture classification etc.I am a member of NOBIM (Norwegian Image and Pattern Recognition Society) and IEEE.   

I am currently a member of Member of IEEE Image, Video, and Multidimensional Signal Processing Technical Committee (IVMSP)


My CV.  (updated Oct 2015)


Utvalgte publikasjoner

Journal Publications:

1.      Sandra Morales, Kjersti  Engan, V. Naranjo, and A. Colomer, ?Retinal Disease Screening through Local Binary Patterns?. IEEE journal of biomedical and health informatics, 2015, DOI 10.1109/JBHI.2015.2490798

2.      L. Woie, K. Engan,T. Eftestøl, A.I. Larsen, S. Ørn "The Localization and Characterization of Ischemic Scars in relation to the Infarct Related Coronary Artery Assessed by Cardiac Magnetic Resonance and a Novel Automatic Postprocessing Method." Cardiology Research and Practice, vol. 2015, Article ID 120874, 2015. doi:10.1155/2015/120874

3.      L. Woie, K. Engan, T. Eftestøl, J. T. Kvaløy, S. Ørn ?The relationship between transmurality of ischemic scars and the heart rate of ventricular tachycardia?, Scandinavian Cardiovascular Journal 49.5 (2015): 241-248, available online July 2015.

4.      L. P. Kotu, K. Engan, R. Borhani, A. K. Katsaggelos, S. Ørn, L. Woie, T. Eftestøl, ?Cardiac magnetic resonance image-based classification of the risk of arrhythmias in post-myocardial infarction patients?, Artificial Intelligence in Medicine, Elsevier, 64.3 (2015): 205-215. doi:10.1016/j.artmed.2015.06.001 

5.      K. Oppedal, T. Eftestøl, K. Engan, M. K. Beyer, and D. Aarsland, ?Classifying Dementia Using Local Binary Patterns from Different Regions in Magnetic Resonance Images,? International Journal of Biomedical Imaging, vol. 2015, Article ID 572567, 14 pages, 2015. doi:10.1155/2015/

6.      L. P. Kotu, K. Engan, K. Skretting, S. Ørn, L. Woie, and T. Eftestøl, ?Segmentation of Scarred Myocardium in Cardiac Magnetic Resonance Images,? ISRN Biomedical Imaging, vol. 2013, Article ID 504594, 12 pages, 2013. doi:10.1155/2013/504594

7.      L. Woie, F. Måløy, T. Eftestøl, K. Engan, T. Edvardsen, J.T. Kvaløy, and S. Ørn, ?Comparing a novel automatic 3D method for LGE-CMR quantification of scar size with established methods ?, The International Journal of Cardiovascular Imaging, 2013, doi:10.1007/s10554-013-0329-0.

8.      L. P. Kotu, K. Engan, K. Skrettingl, F. Måløy, S. Ørn, L. Woie, T. Eftestøl,  ?Probability mapping of scarred myocardium using texture and intensity features in CMR images?, BioMedical Engineering, DOI: 10.1186/10.1186/1475-925X-12-91, Sep. 2013.

9.      L.Woie, T.Eftestøl, K.Engan, J.T. Kvaløy, D.W.T. Nielsn, S.Ørn, ?The heart rate of ventricular tachycardia following an old myocardial infarction is inversly related to the size of scarring?  Europace Jan 2011,   doi:10.1093/europace/euq466

10.   K.Skretting, K.Engan  ?Recursive least squares dictionary learning algorithm?, IEEE Trans. Signal Processing, vol. 58, no. 4, pp. 2121-2130, 2010.

11.   K.Engan, T.O.Gulsrud, K.F. Fretheim, B. Furebotten Iversen, L. Eriksen ?A Computer Aided Detection (CAD) System for Microcalcifications in Mammograms ? MammoScan ?CaD?, WASET, Int. Journal of Bimodeical Sciences (IJBS), Volume 2, No 3, pp 168-179, ISSN 1306-1216, 2007,  http://www.waset.org/ijbs/v2/v2-3-24.pdf

12.   K.Engan, K.Skretting, J. Herredsvela, T.O. Gulsrud, ?Frame Texture Classification Method (FTCM) Applied on Mammograms for Detection of Abnormalities?,  WASET International Journal of Signal Processing (IJSP), Volume 4, No 2, ISSN 1304-4478, 2007, http://www.waset.org/ijsp/v4/v4-2-16.pdf

13.   K.Engan, K. Skretting, J.H. Husøy ?A Family of Iterative LS-Based Dictionary Learning Algorithms, ILS-DLA, for Sparse Signal Representation?, Digital Signal Processing, Volume 17, Issue 1, pp 32-49, Jan 2007, http://dx.doi.org/10.1016/j.dsp.2006.02.002

14.   K.Engan, T.O.Gulsrud, ?VarMet ? a method for detection of image singularities with applications to mammography?, WSEAS Transactions on Signal Processing, Issue 9, Volume 2, pp. 1222-1229, sept 2006.

15.   S. Cotter, B. D. Rao, K. Engan, K. Kreutz-Delgado ``Sparse Solutions to Linear Inverse Problems with Multiple Measurement Vectors,?  IEEE Trans. on Signal Processing 2005, vol. 53, no. 7, pp. 2477-2488, July 2005

16.   B. D. Rao, K. Engan, S. Cotter, J. Palmer, K. Kreutz-Delgado ``Subset Selection in Noise Based on Diversity Measure  Minimization,''IEEE Trans. on Signal Processing, vol. 51, no. 3, pp. 760--770, March 2003.

17.   K. Kreutz-Delgado, J. F. Murray, B. D. Rao, K. Engan, T.W. Lee, and T. Sejnowski  ``Dictionary Learning Algorithms for Sparse Representation,?? Neural Computation, no 15, pp. 349?396, 2003.

18.   S. O. Aase, J. H. Husøy, K. Skretting, and K. Engan, ``Optimised signal expansions for sparse representation,?? IEEE Trans. Signal Processing, vol. 49, pp. 1087--1096, May 2001.

19.   K. Engan, S. O. Aase, and J. H. Husøy, ``Multi-frame compression: Theory and design,'' Signal Processing, vol. 80, pp. 2121--2140, Oct. 2000.


Conference publications


1.      S.Morales, K.Engan, V. Naranjo, A. Colomer, ?Detection of diabetic retinopathy and age-related macular degeneration from fundus images through local binary patterns and random forests?, ICIP 2015, Sept. 2015, Québec City, Canada.

2.      F.Barzideh, K. Skretting, K. Engan ?The flexible signature dictionary?, Eusipco 2015, Sept 2015, Nice France.

3.      K.Engan, V. Naranjo, T.Eftestøl, S.Ørn, L.Woie ,?Segmentation of LG Enhanced Cardiac MRI? Proc. of Bioimaging, Biostec, jan 2015, Lisbon, Portugal. 

4.      Huyen Vu, Trygve Eftestøl, Kjersti Engan, Joar Eilevstjønn, Jørgen E. Linde, Hege Ersdal, ?Exploratory Analysis of Ventilation Signals from Resuscitation Data of Newborns?, Proc. of Biosignals, Biostec, jan 2015, Lisbon, Portugal. 

5.      T.Eftestøl, F.Måløy, K.Engan, L.P. Kotu, L.Woie, S.Ørn ?A Texture-Based Probability Mapping for Localisation of Clinically Important Cardiac Segments in The Myocardium in Cardiac Magnetic Resonance Images from Myocardial Infarction Patients?, Proc. of ICIP 2014, oct 2014, Paris, France.

6.      K. Skretting and K.Engan  ?Energy Minimization by alpha-erosion for Supervised Texture Segmentation?, Lecture Notes in Computer Science, Image Analysis and Recognition, ICIAR2014, Vilamoura, Portugal

7.      A.B.Rad,T.Eftestøl, J.T. Kvaløy, U.Ayala, J Kramer-Johansen, K.Engan,  ?Nearest-manifold classification approach for cardiac arrest rhythm interpretation during resuscitation? Proc of  ICASSP 2014, May 2014, Firenze, Italy

8.      K.Engan, L.Woie, T. Eftestøl, ?Defining Angular and Radial Positions and Parameters for Myocardial Pixels in Cardiac MR Images?, Proc of Computing in Cardiology (CinC) 2014, Sept 2014, Cambridge, USA.

9.      H.Vu,   T. Eftestøl, K. Engan­, J. Eilevstjønn, J. Linde, H. Ersdal  ?Exploratory Analysis of Heart Rate Changes in Newborns to Investigate the Effectiveness of Bag-Mask Ventilation?, Proc of Computing in Cardiology (CinC) 2014, Sept 2014, Cambridge, USA.

10.   T.Eftestøl, L. Woie, K.Engan, J.T. Kvaløy, D.W.T. Nilsen, S. Ørn?Texture analysis to assess risk of serious arrhythmias after myocardial infarction?, Proc. of Computing in Cardiology (CinC) 2012, Krakow, Poland 2012.

11.   K. Engan, V. Naranjo, T. Eftesøl, L. Woie, A. Schuchter, S. Ørn ?Automatic Detection of Heart Center in Late Gadolinium Enhanced MRI?, Proc. of  Medicon 2013, Sevilla Spain, Sept. 2013.

12.   A. Bahrami Rad, T. Eftestøl, J.T. Kvaløy, U. Ayala, J. Kramer-Johansen, K. Engan, ?Probabilistic Classification Approaches for Cardiac Arrest Rhythm Interpretation during Resuscitation?, Proc. of Computing in Cardiology (CinC) 2013, Zaragoza, Spain, Sept. 2013.

13.   K. Engan, V. Naranjo, T. Eftestøl, S. Ørn, L. Woie ?Automatic Segmentation of the Epicardium in Late Gadolinium Enhanced Cardiac MR Images?, Proc. of Computing in Cardiology (CinC) 2013, Zaragoza, Spain, Sept. 2013.

14.   F. Måløy, L. Woie, T. Eftestøl, K. Engan, S. Ørn, ?Measuring the Degree of Fibrosity in Myocardial Scars from LGE-CMR Images?, Proc. of Computing in Cardiology (CinC) 2013, Zaragoza, Spain, Sept. 2013.

15.   L.P.Kotu, K.Engan, T. Eftestøl, L.Woie, S.Ørn, A.K. Katsaggelos, ?Local Binary Patterns used on Cardiac MRI to classify high and low risk patient groups?, Proc. of Eusipco 2012, Bucharest, Romania.

16.   K.Oppedal, K.Engan, D.Aarsland, M. Beyer, O.B. Tysnes, T.Eftestøl, ?Using local binary pattern to classify dementia in MRI?, Proc. of  IEEE Int. Symp. on Biomed. Imaging (ISBI), Barcelona, Spain, May 2012. DOI:10.1109/ISBI.2012.6235618

17.   K. Skretting, K. Engan, ?Image Compression Using Learned Dictionaries by RLS-DLA and Compared with K-SVD? in Proc. ICASSP 2011, May 2011, Prague, Chech Republic.

18.   L.P. Kotu, K.Engan, T. Eftestøl, S. Ørn, L.Woie ?Segmentation of Scarred and Non-Scarred Myocardium in LG Enhanced CMR Images using Intensity-Based Textural Analysis? Proc. of EMBC 2011, aug 2011, Boston, USA.

19.   L.P. Kotu, K.Engan, T. Eftestøl, S. Ørn, L.Woie ?Texture Classification of Scarred and Non-scarred Myocardium in Cardiac MRI Using Learned Dictionaries? Proc. of ICIP 2011, sept 2011, Brussels, Belgium.

20.   K. Skretting, K. Engan ?Learned dictionaries for sparse image representation: properties and results?  SPIE, Wavelets and Sparsity, Aug. 2011, San Diego, USA

21.   K.Engan, T.Eftestøl, S.Ørn, J.T. Kvaløy, L.Woie, ? Exploratory Data Analysis of Image Texture and Statistical Features on Myocardium and Infarction Areas in Cardiac Magnetic Resonance Images?  Proc. of Engineering in medicine and Biology conference (EMBC) 2010, september 2010, Buenos Aires, Argentina.

22.   T.O.Gulsrud, K.Engan, J.Herredsvela, ?VarMet- A Novel Method for Detection of Image Singularities?,  Proc. of WSEAS int.conf. on Signal, Speech and Image Proc. 2006 (SSIP?06), Lisbon Portugal, sept 2006.

23.   K. Engan, M. Lillo, T.O. Gulsrud ?Compression of Digital Mammograms with Region-of-interest Coding Evaluated on a CAD System?, in Proc. Medical Imaging 2005, SPIE conference, Feb. 2005, San Diego, USA, pp. 1018--1027.

24.   T.O. Gulsrud, K. Engan, J. Herredsvela ?Feature Extraction in Digital Mammograms Based on Optimal and Morphological Filtering?, in Proc. Medical Imaging 2005, SPIE conf., Feb. 2005, San Diego, USA, pp. 1093--1103.

25.   J. Herredsvela, T.O. Gulsrud, K. Engan, ?Detection of Masses in Mammograms Using Morphological Segmentation?, in Proc. Medical Imaging 2005, SPIE conference, Feb. 2005, San Diego, USA, pp. 902--913.

26.   K. Engan, K. Skretting, J.H. Husøy ?Denoising of Images Using Signal Dependent Frames and Matching Pursuit?,  in Proc. ICASSP 2005, Philadelphia, USA, march 2005.

27.   K. Skretting, K. Engan, J.H. Husøy ?ECG Compression Using Signal Dependent Frames and Matching Pursuit?, in Proc. ICASSP 2005, Philadelphia, USA, march 2005.

28.   T.O. Gulsrud, K. Engan and T. Hanstveit ? Watershed segmentation of detected masses in digital mammograms? in Proc. EMBC 2005, september 2005, Shanghai, China.

29.   E. Kristoffersen, I.Austvoll. K.Engan ? Dense Motion Field Estimation Using Spatial Filtering and Quasi Eigenfunction Approximations?, in Proc. ICIP 2005,  September 2005, Genova, Italia

30.   J.Tjøtta, K.Engan, T.O. Gulsrud, I. Skaland, E.A.M. Janssen , and J.P.A. Baak, ?Automatic Counting and Classifying of Cell-Nuclei in a Tissue Section?, Proc. of  NORISG 2005, Stavanger, Norway, sept. 2005.

31.   J. Herredsvela, K. Engan, T.O. Gulsrud, K. Skretting, ?Detection of  Masses in Mammograms by Watershed Segmentation and Sparse Representasions Using Learned Dictionaries?, Proc. of NORISG, Stavanger, Norway, 2005.

32.   J.Herredsvela, K.Engan, T.O.Gulsrud, K.Skretting, ? Detection of lesions in mammograms using learned dictionaries and sparse representations?, Proc. of EMBEC?05, Prague, Czech Republic, Nov. 2005.

33.   J.Herredsvela, K.Engan, T.O.Gulsrud, K.Skretting,  ?Texture classification using sparse representations by learned compound dictionaries?, Proc. of SPARS?05, Rennes, France, nov 2005.

34.   K. Engan, and K. F. Fretheim, and T. O. Gulsrud, ``Compression of Digital Mammograms without Interfering with a System for Automatic Detection of Microcalcifications - MammoScan mCaD '' in   Proc. NOBIM 2004, Stavanger, Norway, May. 2004.

35.   B. Rao, and K. Engan, and S. Cotter, ?Diversity Measure Minimization Based Method for Computing Sparse Solutions to Linear Inverse Problems with Multiple Measurement Vectors,'' in Proc. ICASSP 2004, Montreal, Canada, May 2004.

36.   K. Engan, T. O. Gulsrud, and K. R. Josefsen, ``Watermarking of Digital Mammograms Without Interfering with Automatic Detection of Microcalcifications,'' in   Proc. of ICIP 2003, Barcelona, Spain, September 2003.

37.   K. F. Fretheim, and K. Engan, ?Comparison of Four Wavelet-Based Methods for Compression of ECG Signals,? in   Proc. NORISG 2003, Bergen, Norway, Oct. 2003.

38.   K. Engan, K. Skretting, ``A Novel Image Denoising Technique Using Overlapping Frames,'' in   Proc. of 2nd. IASTED Int. Conf. on Visualization, Imaging, and Image Processing, Malaga, Spain, pp. 265--270, September, 2002.

39.   K. Skretting, K. Engan, J. H. Husøy, and S. O. Aase, ``Sparse representation of images using overlapping frames,'' in   Proc. SCIA'01, Bergen, Norway, June 2001.

40.   J. E. Odegard, K. Engan, T. O. Gulsrud, and A. Rettedal, ``Redesign of introductory course in electrical and computer engineering at Stavanger university college,'' in   Proc. ICEE?01, Oslo, Norway, Aug. 2001.

41.   K. Engan, J. H. Husøy, and S. O. Aase, ``Frame based representation and compression of still images,''  in   Proc. ICIP'01 , Thesaloniki, Greece, Oct. 2001.

42.   K. Engan and J. R. Akselsen, ``Comparison of frame based coding (FBC) with multi stage vector quantization (MSVQ),'' in   Proc. NORSIG ?01, Trondheim, Norway, Oct. 2001, pp. 123--128.

43.   K. Engan, B. Rao, and K. Kreutz-Delgado, ``Regularized FOCUSS for subset selection in noise,'' in Proc. of NORSIG 2000, Sweden, June 2000, pp. 247--250.

44.   S. O. Aase, K. Skretting, J. H. Husøy, and K. Engan, ``Design of signal expansions for sparse representation,'' in   Proc. ICASSP'00, Istanbul, Turkey, June 2000.

45.   K. Engan, S. O. Aase, J. H. Husøy, ?Method of Optimal Directions for Frame Design,? in   Proc. ICASSP?99, Phoenix, USA, pp. 2443--2446, March, 1999.

46.   K. Kreutz-Delgado, B. D. Rao, K. Engan, T.-W. Lee, and T. Sejnowski, ``Convex/schur-convex ( CSC ) log-priors and sparse coding,'' in   Proc. 6th joint symp. on Neural Comp. , Pasadena, USA, May 1999, vol. 9, pp. 65--71.

47.   K. Kreutz-Delgado, B. D. Rao, K. Engan, T. W. Lee, and T. Sejnowski, ``Learning overcomplete dictionaries: Convex/schur-convex (CSC) log-priors, factorial codes, and independent/dependent component analysis (I/DCA),'' in   Proc. 6th joint symp. on Neural Comp. , Pasadena, USA, May 1999, vol. 9, pp. 72--78.

48.   K. Engan, S. O. Aase, and J. H. Husøy, ``Frame based signal compression using method of optimal directions  (MOD),'' in   Proc. ISCAS?99, Orlando, USA, June 1999, pp. IV--1--IV--4.

49.   J. H. Husøy, S. O. Aase, K. Skretting, and K. Engan, ``Design of general block oriented expansions for efficient signal representation,'' in   Proc. ISCAS?99, Orlando, USA, June 1999, pp. III--9--III--12.

50.   K. Engan, B. Rao, and K. Kreutz-Delgado, ``Frame design using FOCUSS with method of optimized directions (MOD),'' in Proc. NORSIG ?99, Oslo, Norway, Sept. 1999, pp. 65--69.

51.   K. Kreutz-Delgado, B. D. Rao, and K. Engan, ``Novel algorithms for learning overcomplete dictionaries,'' in   Proc. of the 33 Asilomar Conference on Signals, Systems and Computers, Monterey, California, 1999.

52.   K. Engan, S. O. Aase, and J. H. Husøy, ``Designing frames for matching pursuit algorithms,'' in Proc. ICASSP ?98, Seattle, USA, May 1998, pp. 1817--1820.

53.   K. Engan, J. H. Husøy, and S. O. Aase, ``Optimized frame design for a matching pursuit based compression scheme,'' in Proc. EUSIPCO ?98, Rhodes, Greece, Sept. 1998, pp. 153--156.

54.   K. Engan, J. H. Husøy, and S. O. Aase, ?Optimized frames of variable size for use in a matching pursuit based compression scheme,? in   Proc. NORSIG ?98, Vigsø, Denmark, June 1998, pp. 277--280.

55.   K. Engan, S. O. Aase, and J. H. Husøy,  ``Transform based   ECG signal compression using nonorthogonal vectors,'' in Proc. NORSIG '97 , Tromsø, Norway, May 1997, pp. 140--145.

    Pågående forskning

    Arbeidserfaring

    2008 ? present:  Professor, dept. of Electrical Eng. and Comp. Science, University of Stavanger, Norway

    2000 ? aug 2008:  Associate professor, dept. of Electrical Eng. and Comp. Science, University of Stavanger, Norway

    Feb 2008 ? april 2009:  Maternity leave
    Jan 2006 ? jan 2007:  Maternity leave

    2003 ? 2005:  Researcher at MammoScan AS ,

    Vitenskapelige publikasjoner (fra CRISTin)

    • Oppedal, Ketil; Eftestøl, Trygve Christian; Engan, Kjersti; Aarsland, Dag; Beyer, Mona K. (2016). White Matter Lesions and Pattern Recognition in MRI of Neurodegenerative Dementia. Universitetet i Stavanger. ISBN 978-82-7644-674-6. 166 s.
    • Vu, Thi Phuong Huyen; Eftestøl, Trygve Christian; Engan, Kjersti (2016). Respiratory-cardio signal processing and analysis of resuscitation data on newborns in low-resource settings. Universitetet i Stavanger. ISBN 978-82-7644-661-6. 174 s.
    • Engan, Kjersti (2016). Sparse representation and learned dictionaries in biomedical applications. 2016-08-29 - 2016-09-01.
    • Naranjo, Valery; Saez, C; Morales, Sandra; Engan, Kjersti; Gomez, S. (2016). Optic Cup Characterization through Sparse Representation and Dictionary Learning. Eurasip; 2016-08-28 - 2016-09-02.
    • Tveit, Daniel Myklatun; Engan, Kjersti; Austvoll, Ivar; Meinich-Bache, Øyvind (2016). Motion Based Detection of Respiration Rate in Infants Using Video. IEEE; 2016-09-25 - 2016-09-28.
    • Barzideh, Faraz; Skretting, Karl; Engan, Kjersti (2015). The flexible signature dictionary. Eurasip; 2015-08-31 - 2015-09-04.
    • Colomer, Adrian; Naranjo, Valery; Engan, Kjersti; Skretting, Karl (2015). Retinal vessel inpainting using Recursive Least Square Dictionary Learning Algorithm. Eurasip; 2015-11-10 - 2015-11-13.
    • Eftestøl, Trygve Christian; Singsaas, Erlend; Engan, Kjersti; Woie, Leik; Ørn, Stein (2015). Automatic Detection of Microvascular Obstruction in Patients with Myocardial Infarction. Computing in Cardiology; 2015-09-06 - 2015-09-09.
    • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2015). Segmentation of LG Enhanced Cardiac MRI. Insticc; 2015-01-12 - 2015-01-15.
    • Morales, Sandra; Engan, Kjersti; Naranjo, Valery; Colomer, Adrian (2015). Detection of diabetic retinopathy and age-related macular degeneration from fundus images through local binary patterns and random forests. IEEE; 2015-09-27 - 2015-09-30.
    • Vu, Huyen; Eftestøl, Trygve; Engan, Kjersti; Eilevstjønn, Joar; Linde, Jørgen Erland; Ersdal, Hege (2015). Exploratory Analysis of Ventilation Signals from Resuscitation Data of Newborns. Insticc; 2015-01-12 - 2015-01-15.
    • Eftestøl, Trygve; Måløy, Frode; Engan, Kjersti; Kotu, Lasya Priya; Woie, Leik; Ørn, Stein (2014). A Texture-based Probability Mapping for Localisation of Clinically Important Cardiac Segments in the Myocardium in Cardiac Magnetic Resonance Images from Myocardial Infarction Patients. IEEE; 2014-10-27 - 2014-10-30.
    • Engan, Kjersti (2014). Signal- og bildebehandling av medisinske data. 2014-11-05.
    • Engan, Kjersti; Woie, Leik; Eftestøl, Trygve (2014). Defining Angular and Radial Positions and Parameters for Myocardial Pixels in Cardiac MR Images. 2014-09-07 - 2014-09-10.
    • Huyen, Vu; Eftestøl, Trygve; Engan, Kjersti; Eilevstjønn, Joar; Linde, Jørgen Erland; Ersdal, Hege (2014). Exploratory Analysis of Heart Rate Changes in Newborns to Investigate the Effectiveness of Bag-Mask Ventilation. 2014-09-07 - 2014-09-10.
    • Rad, Ali Bahrami; Eftestøl, Trygve; Kvaløy, Jan Terje; Ayala, Unai; Kramer-Johansen, Jo; Engan, Kjersti (2014). Nearest-manifold classification approach for cardiac arrest rhythm interpretation during resuscitation. IEEE; 2014-05-04 - 2014-05-09.
    • Skretting, Karl; Engan, Kjersti (2014). Energy Minimization by alpha-erosion for Supervised Texture Segmentation. AIMI (Association for Image and Machine Intelligence); 2014-10-22 - 2014-10-24.
    • Rad, Ali Bahrami; Eftestøl, Trygve; Kvaløy, Jan Terje; Ayala, Unai; Kramer-Johansen, Jo; Engan, Kjersti (2013). Probabilistic Classification Approaches for Cardiac Arrest Rhythm Interpretation during Resuscitation. 2013-09-22 - 2013-09-25.
    • Engan, Kjersti (2013). Sparse Representations and Learned Dictionaries. LabHuman, Polytechnic University of Valencia; 2013-11-14.
    • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Woie, Leik; Schuchter, Arthur; Ørn, Stein (2013). Automatic Detection of Heart Center in Late Gadolinium Enhanced MRI. 2013-09-25 - 2013-09-28.
    • Engan, Kjersti; Naranjo, Valery; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2013). Automatic Segmentation of the Epicardium in Late Gadolinium Enhanced Cardiac MR Images. 2013-09-22 - 2013-09-25.
    • Måløy, Frode; Woie, Leik; Eftestøl, Trygve; Engan, Kjersti; Ørn, Stein (2013). Measuring the Degree of Fibrosity of Myocardial Scars from Late Gadolinium- Enhanced Cardiovascular Magnetic Resonance Images. 2013-09-22 - 2013-09-25.
    • Eftestøl, Trygve; Woie, Leik; Engan, Kjersti; Kvaløy, Jan Terje; Nilsen, Dennis W.T.; Ørn, Stein (2012). Texture Analysis to Assess Risk of Serious Arrhythmias after Myocardial Infarction. Computing in Cardiology; 2012-09-09 - 2012-09-12.
    • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Woie, Leik; Ørn, Stein; Katsaggelos, Aggelos (2012). LOCAL BINARY PATTERNS USED ON CARDIAC MRI TO CLASSIFY HIGH AND LOW RISK PATIENT GROUPS. European Association for Signal, Speech, and Image Processin; 2012-08-27 - 2012-08-31.
    • Oppedal, Ketil; Engan, Kjersti; Aarsland, Dag; Beyer, Mona Kristiansen; Tysnes, Ole-Bjørn; Eftestøl, Trygve (2012). Using local binary pattern to classify dementia in MRI. IEEE EMB; 2012-05-02 - 2012-05-05.
    • Engan, Kjersti (2011). Adaptive/online learning of dictionaries by RLS-DLA (Recursive Least Squares Dictionary Learning Algorithm) with Applications. SMALL project (http://small-project.eu/); 2011-01-06 - 2011-01-07.
    • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2011). Segmentation of Scarred and Non-Scarred Myocardium in LG Enhanced CMR Images using Intensity-Based Textural Analysis. IEEE Engineering in Medecine and biology society; 2011-08-30 - 2011-09-03.
    • Kotu, Lasya Priya; Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Woie, Leik (2011). TEXTURE CLASSIFICATION OF SCARRED AND NON-SCARRED MYOCARDIUM IN CARDIAC MRI USING LEARNED DICTIONARIES. IEEE signal processing society; 2011-09-11 - 2011-09-14.
    • Skretting, Karl; Engan, Kjersti (2011). Image Compression Using Learned Dictionaries by RLS-DLA and Compared with K-SVD. IEEE Singal Processing Society; 2011-05-22 - 2011-05-27.
    • Skretting, Karl; Engan, Kjersti (2011). Learned dictionaries for sparse image representation: Properties and results. SPIE - The International Society for Optical Engineering; 2011-08-21 - 2011-08-24.
    • Engan, Kjersti; Eftestøl, Trygve; Ørn, Stein; Kvaløy, Jan Terje; Woie, Leik (2010). Exploratory Data Analysis of Image Texture and Statistical Features on Myocardium and Infarction Areas in Cardiac Magnetic Resonance Images. 2010-08-31 - 2010-09-04.
    • Woie, Leik; Eftestøl, Trygve; Engan, Kjersti; Kvaløy, Jan terje; Nilsen, Dennis W.T.; Ørn, Stein (2010). European Heart Journal 2010;Vol.31(Abstract Supplement):586. [2010] [P3371] Use of late gadolinium enhancement cardiovascular magnetic resonance images and texture analyses to distinguish patients with high and low risk of arrhythmias after myocardial infarction. ESC; 2010-08-28 - 2010-09-01.
    • Engan, Kjersti (2010). Learning overcompletedictionaries for sparse representation of images. 2010-09-06 - 2010-09-08.
    • Gulsrud, Thor Ole; Engan, Kjersti; Herredsvela, Jostein (2006). VarMet - A Novel Method for Detection of Image Singularities. 2006-09-22 - 2006-09-24.
    • Engan, Kjersti; Lillo, Martin; Gulsrud, Thor Ole (2005). Compression of Digital Mammograms with Region-of-interest Coding Evaluated on a CAD System. 2005-02-12 - 2005-02-17.
    • Engan, Kjersti; Skretting, Karl; Husøy, John Håkon (2005). Denoising of Images Using Signal Dependent Frames and Matching Pursuit. 2005-03-18 - 2005-03-23.
    • Gulsrud, Thor Ole; Engan, Kjersti; Herredsvela, Jostein (2005). Feature extraction in digital mammograms based on optimal and morphological filtering. 2005-02-12 - 2005-02-17.
    • Herredsvela, Jostein; Engan, Kjersti; Gulsrud, Thor Ole; Skretting, Karl (2005). Detection of lesions in mammograms using learned dictionaries and sparse representations. 2005-11-20 - 2005-11-25.
    • Herredsvela, Jostein; Engan, Kjersti; Gulsrud, Thor Ole; Skretting, Karl (2005). Detection of masses in mammograms by watershed segmentation and sparse representations using learned dictionaries. 2005-09-22 - 2005-09-24.
    • Herredsvela, Jostein; Engan, Kjersti; Gulsrud, Thor Ole; Skretting, Karl (2005). Texture Classification Using Sparse Representations by Learned Compound Dictionaries. 2005-11-16 - 2005-11-18.
    • Herredsvela, Jostein; Gulsrud, Thor Ole; Engan, Kjersti (2005). Detection of circumscribed masses in mammograms using morphological segmentation. 2005-02-13 - 2005-02-17.
    • Kristoffersen, Espen; Austvoll, Ivar; Engan, Kjersti (2005). Dense Motion Field Estimation Using Spatial Filtering and Quasi Eigenfunction Approximations. 2005-09-11 - 2005-09-14.
    • Skretting, Karl; Engan, Kjersti; Husøy, John Håkon (2005). ECG compression using signal dependent frames and Matching Pursuit. 2005-03-18 - 2005-03-23.
    • Tjøtta, Jarle; Engan, Kjersti; Gulsrud, Thor Ole; Skaland, Ivar; Janssen, E.A.M.; Baak, J.P.A. (2005). Automatic Counting and Classifying of Cell-Nuclei in a Tissue Section. 2005-09-22 - 2005-09-24.
    • Engan, Kjersti; Fretheim, Karl Fredrik; Gulsrud, Thor Ole (2004). Compression of Digital Mammograms without Interfering with a System for Automatic Detection of Microcalcifications - MammoScan uCaD. 2004-05-27.
    • Engan, Kjersti; Rao, Bhaskar; Cotter, Shane (2004). Diversity Measure Minimization Based Method for ComputingSparse Solutions to Linear Inverse Problems with Multiple Measurement Vectors. 2004-05-17.
    • Engan, Kjersti; Gulsrud, Thor Ole; Josefsen, Kai Ruben (2003). Watermarking of digital mammograms without interfering with automatic detection of microcalcifications. 2003-09-14 - 2003-09-17.
    • Fretheim, Karl Fredrik; Engan, Kjersti (2003). Comparison of Four Wavelet-Based Methods for Compression of ECG Signals. 2003-10-02 - 2003-10-04.
    • Engan, Kjersti; Skretting, Karl (2002). A Novel Image Denoising Technique Using Overlapping Frames. 2002-09-09 - 2002-09-12.
    • Aase, Sven Ole; Skretting, Karl; Husøy, John Håkon; Engan, Kjersti (2001). Design of Signal Expansions for Sparse Representation.
    • Engan, Kjersti; Akselsen, Jan Roger (2001). Comparison of Frame Based Coding (FBC) with Multi Stage Vector Quantization (MSVQ). 2001-10-18 - 2001-10-20.
    • Engan, Kjersti; Husøy, John Håkon; Aase, Sven Ole (2001). Frame based representation and compression of still images. 2001-10-07 - 2001-10-10.
    • Engan, Kjersti; Rao, Bhaskar; Kreutz-Delgado, Kenneth (2001). Regularized FOCUSS for Subset Selection in Noise.
    • Skretting, Karl; Engan, Kjersti; Husøy, John Håkon; Aase, Sven Ole (2001). Sparse representation of images using overlapping frames. 2001-06-11 - 2001-06-14.
    • Ødegård, Jan Erik; Engan, Kjersti; Gulsrud, Thor Ole; Rettedal, Arne (2001). Redesign of introductory course in electrical and computer engineering at Stavanger University College. 2001-08-06 - 2001-08-10.
    • Ødegård, Jan Erik; Engan, Kjersti; Gulsrud, Thor Ole; Rettedal, Arne (2001). Redesign of introductory course in electrical and computer engineering at Stavanger University College. 2001-08-06 - 2001-08-10.
    • Engan, Kjersti; Rao, Bhaskar; Kreutz-Delgado, Kenneth (2000). Frame Design Using FOCUSS with Method of Optimal Directions (MOD).
    • Engan, Kjerti; Aase, Sven Ole; Husøy, John Håkon (2000). Transform based ECG signal compression using nonorthogonal vectors.
    • Husøy, John Håkon; Aase, Sven Ole; Skretting, Karl; Engan, Kjersti (2000). Design of general block oriented expansions for efficient signal representation.
    • Kreutz-Delgado, K.; Rao, B.D.; Engan, Kjersti; Lee, T.-W.; Sejnowski, T. (2000). Convex/Schur-Convex (CSC) Log-Priors and Sparse Coding.
    • Kreutz-Delgado, K.; Rao, B.D.; Engan, Kjersti; Lee, T.-W.; Sejnowski, T. (2000). Learning Overcomplete Dictionaries: Convex/Schur-Convex(SCS) Log-Priors, Factorial Codes, and Independent/Dependent Component Analysis (I/DCA).
    • Engan, Kjersti; Aase, Sven Ole; Husøy, John Håkon (1999). Frame based signal compression using method of optimal directions (MOD).
    • Engan, Kjersti; Aase, Sven Ole; Husøy, John Håkon (1999). Method of optimal directions for frame design.
    • Engan, Kjersti; Husøy, John Håkon; Aase, Sven Ole (1999). Optimized frame design for a matching pursuit based compression scheme.
    • Engan, Kjersti; Husøy, John Håkon; Aase, Sven Ole (1999). Optimized frames of variable size for use in a matching pursuit based compression scheme.
    • Engan, Kjersti; Aase, Sven Ole; Husøy, John Håkon (1997). Designing frames for matching pursuit algorithms.
    • Herredsvela, Jostein; Engan, Kjersti; Gulsrud, Thor Ole; Skretting, Karl (2005). Detection of masses in mammograms by watershed segmentation and sparse representation using learned dictionaries.