Fritz Albregtsen

Professor Emeritus - Institutt for informatikk
Bilde av Fritz Albregtsen
English version of this page
Brukernavn
Besøksadresse Gaustadalléen 23B Ole-Johan Dahls hus 0373 Oslo
Postadresse Postboks 1080 Blindern 0316 Oslo

Faglige interesser

Jeg forsker mest på hvordan vi kan bruke kvantitativ bildeanalyse til å gi sikre prognoser for kreftpasienter. Dette gjør jeg sammen med egne Master- og PhD-studenter og kollegaer ved Radiumhospitalet. Data er digitale mikroskopibilder av cellekjerner fra pasientmaterialer som dekker flere krefttyper, og målet er å finne kompakte sett av adaptive tekstur-egenskaper i en høydimensjonal mengde av mulige egenskaper.

I tillegg arbeider jeg med kvantitative metrikker for bildekvalitet sammen med PhD-studenter og kollegaer ved Høgskolen i Gjøvik.

Undervisning

http://www.uio.no/studier/emner/matnat/ifi/INF2310/

http://www.uio.no/studier/emner/matnat/ifi/INF4300/

http://www.uio.no/studier/emner/matnat/ifi/INF5300/

http://www.uio.no/studier/emner/matnat/ifi/INF-GEO4310/

Bakgrunn

Jeg har utdannings- og arbeidsbakgrunn fra teoretisk astrofysikk, men har vært ved Ifi siden 1983, og har arbeidet med medisinsk informatikk siden tidlig på 90-tallet.

 

Emneord: bildeanalyse, teksturanalyse, medisinsk informatikk, kvalitetsmetrikker

Publikasjoner

  • Nainamalai, Varatharajan; Prasad, Pravda Jith Ray; Pelanis, Egidijus; Edwin, Bjørn von Gohren; Albregtsen, Fritz & Elle, Ole Jakob [Vis alle 7 forfattere av denne artikkelen] (2022). Evaluation of clinical applicability of automated liver parenchyma segmentation of multi-center magnetic resonance images. European Journal of Radiology Open (EJR Open). ISSN 2352-0477. 9. doi: 10.1016/j.ejro.2022.100448.
  • Prasad, Pravda Jith Ray; Survarachakan, Shanmugapriya; Khan, Zohaib Amjad; Lindseth, Frank; Elle, Ole Jacob & Albregtsen, Fritz [Vis alle 7 forfattere av denne artikkelen] (2021). Numerical evaluation on parametric choices influencing segmentation results in radiology images—a multi-dataset study. Electronics. ISSN 2079-9292. 10:431(4), s. 1–25. doi: 10.3390/electronics10040431. Fulltekst i vitenarkiv
  • Kleppe, Andreas; Albregtsen, Fritz; Trovik, Jone; Kristensen, Gunnar S Balle & Danielsen, Håvard Emil (2020). Prognostic value of the diversity of nuclear chromatin compartments in gynaecological carcinomas. Cancers. ISSN 2072-6694. 12:3838(12), s. 1–16. doi: 10.3390/cancers12123838. Fulltekst i vitenarkiv
  • Skrede, Ole-Johan; De Raedt, Sepp; Kleppe, Andreas; Hveem, Tarjei Sveinsgjerd; Liestøl, Knut & Maddison, John [Vis alle 20 forfattere av denne artikkelen] (2020). Deep learning for prediction of colorectal cancer outcome: a discovery and validation study. The Lancet. ISSN 0140-6736. 395:10221, s. 350–360. doi: 10.1016/S0140-6736(19)32998-8. Fulltekst i vitenarkiv
  • Nielsen, Birgitte; Kleppe, Andreas; Hveem, Tarjei Sveinsgjerd; Pradhan, Manohar; Syvertsen, Rolf Anders & Nesheim, John Arne [Vis alle 11 forfattere av denne artikkelen] (2018). Association Between Proportion of Nuclei With High Chromatin Entropy and Prognosis in Gynecological Cancers. Journal of the National Cancer Institute. ISSN 0027-8874. 110(12), s. 1400–1408. doi: 10.1093/jnci/djy063. Fulltekst i vitenarkiv
  • Kleppe, Andreas; Albregtsen, Fritz; Vlatkovic, Ljiljana; Pradhan, Manohar; Nielsen, Birgitte & Hveem, Tarjei Sveinsgjerd [Vis alle 16 forfattere av denne artikkelen] (2018). Chromatin organisation and cancer prognosis: a pan-cancer study. The Lancet Oncology. ISSN 1470-2045. 19(3), s. 356–369. doi: 10.1016/S1470-2045(17)30899-9. Fulltekst i vitenarkiv
  • Kumar, Rahul Prasanna; Barkhatov, Leonid; Edwin, Bjørn; Albregtsen, Fritz & Elle, Ole Jakob (2017). Portal and hepatic vein segmentation with leak restriction: A pilot study. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. 65, s. 823–826. doi: 10.1007/978-981-10-5122-7_206.
  • Hveem, Tarjei Sveinsgjerd; Njølstad, Tormund Salvesen; Nielsen, Birgitte; Syvertsen, Rolf Anders; Nesheim, John Arne & Kjæreng, Marna Lill [Vis alle 25 forfattere av denne artikkelen] (2016). Changes in Chromatin Structure in Curettage Specimens Identifies High-Risk Patients in Endometrial Cancer. Cancer Epidemiology, Biomarkers and Prevention. ISSN 1055-9965. 26(1), s. 61–67. doi: 10.1158/1055-9965.EPI-16-0215.
  • Hveem, Tarjei Sveinsgjerd; Kleppe, Andreas; Vlatkovic, Ljiljana; Ersvær, Elin; Wæhre, Haakon & Nielsen, Birgitte [Vis alle 13 forfattere av denne artikkelen] (2016). Chromatin changes predict recurrence after radical prostatectomy. British Journal of Cancer. ISSN 0007-0920. 114(11), s. 1243–1250. doi: 10.1038/bjc.2016.96.
  • Holmen, Sigve; Galappaththi-Arachchige, Hashini Nilushika; Kleppa, Elisabeth; Pillay, Pavitra; Naicker, Thajasvarie & Taylor, Myra [Vis alle 9 forfattere av denne artikkelen] (2016). Characteristics of Blood Vessels in Female Genital Schistosomiasis: Paving the Way for Objective Diagnostics at the Point of Care. PLoS Neglected Tropical Diseases. ISSN 1935-2727. 10(4). doi: 10.1371/journal.pntd.0004628.
  • Landmark, Knut; Solberg, Anne H Schistad; Albregtsen, Fritz; Austeng, Andreas & Hansen, Roy Edgar (2015). A Radon-Transform-Based Image Noise Filter - With Applications to Multibeam Bathymetry. IEEE Transactions on Geoscience and Remote Sensing. ISSN 0196-2892. 53(11), s. 6252–6273. doi: 10.1109/TGRS.2015.2436380.
  • Holmen, Sigve; Kleppa, Elisabeth; Lillebø, Kristine; Pillay, Pavitra; Van Lieshout, Lisette & Taylor, Myra [Vis alle 10 forfattere av denne artikkelen] (2015). The first step toward diagnosing female genital schistosomiasis by computer image analysis. American Journal of Tropical Medicine and Hygiene. ISSN 0002-9637. 93(1), s. 80–86. doi: 10.4269/ajtmh.15-0071.
  • Holmen, Sigve; Kjetland, Eyrun Floerecke; Taylor, Myra; Kleppa, Elisabeth; Lillebø, Kristine & Gundersen, Svein Gunnar [Vis alle 8 forfattere av denne artikkelen] (2015). Colourimetric image analysis as a diagnostic tool in female genital schistosomiasis. Medical Engineering and Physics. ISSN 1350-4533. 37(3), s. 309–314. doi: 10.1016/j.medengphy.2014.12.007.
  • Nielsen, Birgitte; Hveem, Tarjei Sveinsgjerd; Kildal, Wanja; Abeler, Vera Maria; Kristensen, Gunnar S Balle & Albregtsen, Fritz [Vis alle 7 forfattere av denne artikkelen] (2015). Entropy-based adaptive nuclear texture features are independent prognostic markers in a total population of uterine sarcomas. Cytometry Part A. ISSN 1552-4922. 87(4), s. 315–325. doi: 10.1002/cyto.a.22601.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Edwin, Bjørn; Langø, Thomas & Elle, Ole Jakob (2015). Three-Dimensional Blood Vessel Segmentation and Centerline Extraction based on Two-Dimensional Cross-Section Analysis. Annals of Biomedical Engineering. ISSN 0090-6964. 43(5), s. 1223–1234. doi: 10.1007/s10439-014-1184-4.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Edwin, Bjørn; Langø, Thomas & Elle, Ole Jakob (2015). Blood vessel segmentation and centerline tracking using local structure analysis. International Federation for Medical and Biological Engineering Proceedings. ISSN 1680-0737. 45, s. 122–125. doi: 10.1007/978-3-319-11128-5_31.
  • Simone, Gabriele; Audino, Giuseppe; Farup, Ivar; Albregtsen, Fritz & Rizzi, Alessandro (2014). Termite retinex: A new implementation based on a colony of intelligent agents. Journal of Electronic Imaging (JEI). ISSN 1017-9909. 23(1). doi: 10.1117/1.JEI.23.1.013006. Fulltekst i vitenarkiv
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Langø, Thomas; Edwin, Bjørn & Elle, Ole Jakob (2013). 3D multiscale vessel enhancement based centerline extraction of blood vessels. I Ourselin, Sebastien & Haynor, David (Red.), SPIE Medical Imaging 2013: Image Processing. SPIE - The International Society for Optics and Photonics. ISSN 978-08-194-9443-6. doi: 10.1117/12.2006779.
  • Nielsen, Birgitte; Albregtsen, Fritz; Kildal, Wanja; Abeler, Vera Maria; Kristensen, Gunnar S Balle & Danielsen, Håvard Emil (2012). The prognostic value of adaptive nuclear texture features from patient gray level entropy matrices in early stage ovarian cancer. Analytical Cellular Pathology. ISSN 2210-7177. 35(4), s. 305–314. doi: 10.3233/ACP-2012-0065.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard Emil (2012). Automatic segmentation of cell nuclei in Feulgen-stained histological sections of prostate cancer and quantitative evaluation of segmentation results. Cytometry. ISSN 0196-4763. 81A(7), s. 588–601. doi: 10.1002/cyto.a.22068.
  • Pedersen, Marius; Bonnier, Nicolas; Hardeberg, Jon Yngve & Albregtsen, Fritz (2011). Image quality metrics for the evaluation of print quality. Proceedings of SPIE, the International Society for Optical Engineering. ISSN 0277-786X. 7867. doi: 10.1117/12.876472.
  • Dunn, J. M.; Hveem, Tarjei Sveinsgjerd; Pretorius, Mikkel; Oukrif, D.; Nielsen, Birgitte & Albregtsen, Fritz [Vis alle 9 forfattere av denne artikkelen] (2011). Comparison of nuclear texture analysis and image cytometric DNA analysis for the assessment of dysplasia in Barrett's oesophagus. British Journal of Cancer. ISSN 0007-0920. 105(8), s. 1218–1223. doi: 10.1038/bjc.2011.353.
  • Nussbaum, Peter Stefan; Hardeberg, Jon Yngve & Albregtsen, Fritz (2011). Regression based characterization of color measurement instruments in printing applications. Proceedings of SPIE, the International Society for Optical Engineering. ISSN 0277-786X. 7866. doi: 10.1117/12.872381.
  • Pedersen, Marius; Bonnier, Nicolas; Hardeberg, Jon Yngve & Albregtsen, Fritz (2010). Estimating print quality attributes by image quality metrics. I NN, . (Red.), Eighteenth Color Imaging Conference : Color Science and Engineering Systems, Technologies and Applications ; Final program and proceedings, November 8 - 12, 2010, San Antonio, Texas / sponsored by Society for Imaging Science and Technology and Society for Information Display. The Society for Imaging Science and Technology. ISSN 978-0-89208-294-0. s. 68–73.
  • Pedersen, Marius; Bonnier, Nicolas; Hardeberg, Jon Yngve & Albregtsen, Fritz (2010). Validation of quality attributes for evaluation of color prints. I NN, . (Red.), Eighteenth Color Imaging Conference : Color Science and Engineering Systems, Technologies and Applications ; Final program and proceedings, November 8 - 12, 2010, San Antonio, Texas / sponsored by Society for Imaging Science and Technology and Society for Information Display. The Society for Imaging Science and Technology. ISSN 978-0-89208-294-0. s. 74–79.
  • Pedersen, Marius; Bonnier, Nicolas; Hardeberg, Jon Yngve & Albregtsen, Fritz (2010). Attributes of image quality for color prints. Journal of Electronic Imaging (JEI). ISSN 1017-9909. 19(1). doi: 10.1117/1.3277145.
  • Akbari, Akbar; Albregtsen, Fritz & Jakobsen, Kjetill Sigurd (2010). Automatic lane detection and separation in one dimensional gel images using continuous wavelet transform. Analytical Methods. ISSN 1759-9660. 2(9), s. 1360–1371. doi: 10.1039/c0ay00167h.
  • Pedersen, Marius; Bonnier, Nicolas; Hardeberg, Jon Yngve & Albregtsen, Fritz (2009). Attributes of a New Image Quality Model for Color Prints. I N, N (Red.), Seventeenth Color Imaging Conference: Color Science and Engineering Systems, Technologies, and Applications; Final Program and Proceedings. The Society for Imaging Science and Technology. ISSN 9780892082889. s. 204–209.
  • Pedersen, Marius; Albregtsen, Fritz & Hardeberg, Jon Yngve (2009). Detection of worms in error diffusion halftoning. I Farnand, Susan P. & Gaykema, Frans (Red.), Image quality and system performance VI 19-21 January 2009, San Jose, California, USA. SPIE - The International Society for Optics and Photonics. ISSN 9780819474926.
  • Pedersen, Marius; Albregtsen, Fritz & Hardeberg, Jon Yngve (2009). Detection of worms in error diffusion halftoning. Proceedings of SPIE, the International Society for Optical Engineering. ISSN 0277-786X.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard Emil (2009). Statistical Nuclear Texture Analysis in Cancer Research: A Review of Methods and Applications. Critical reviews in oncogenesis. ISSN 0893-9675. 14(2-3), s. 89–164.
  • Akbari, Akbar; Marthinsen, Gunnhild; Lifjeld, Jan Terje; Albregtsen, Fritz; Wennerberg, Liv & Stenseth, Nils Christian [Vis alle 7 forfattere av denne artikkelen] (2008). Improved DNA fragment length estimation in capillary electrophoresis. Electrophoresis. ISSN 0173-0835. 29(6), s. 1273–1285. doi: 10.1002/elps.200700523.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2005). Fractal analysis of monolayer cell nuclei from two different prognostic classes of early ovarian cancer. I Losa, G.A.; Nonnenmacher, T.F. & Weibel, E.R. (Red.), Fractals in Biology and Medicine. Birkhäuser Verlag. ISSN 3-7643-7172-2. s. 175–186.
  • Cvancarova, Milada; Albregtsen, Fritz; Brabrand, Knut & Samset, Eigil (2005). Segmentation of ultrasound images of liver tumors applying snake algorithms and GVF. Excerpta Medica: International Congress Series. ISSN 0531-5131. s. 218–223.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard Emil (2004). Low dimensional adaptive texture feature vectors from class distance and class difference matrices. IEEE Transactions on Medical Imaging. ISSN 0278-0062. 23, s. 73–84.
  • Schulerud, Helene & Albregtsen, Fritz (2004). Many are called, but few are chosen. Feature selection and error estimation in high dimensional spaces. Computer Methods and Programs in Biomedicine. ISSN 0169-2607. 73, s. 91–99.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2003). Cancer Diagnostics and Prognostics by Low Dimensional Adaptive Texture Features from Fractal Signature and Lacunarity Matrices. I Capasso, V. (Red.), Mathematical Modelling & Computing in Biology and Medicine. Milan Research Centre for Industrial and Applied Mathematics. ISSN 88-7488-055-3. s. 511–517.
  • Akbari, Akbar & Albregtsen, Fritz (2003). Normalizing the background and removing the trend in one-dimensional DNA fingerprint images. Journal of Chromatography A. ISSN 0021-9673. 1014, s. 11–19.
  • Schulerud, Helene & Albregtsen, Fritz (2002). Effects of many feature candidates in feature selection and classification, Lecture Notes in Computer Science. s. 480–487.
  • Akbari, Akbar; Albregtsen, Fritz & Lingjærde, Ole Christian (2002). Adaptive weighted least squares method for estimation of DNA fragment lenghts from agaros gels. Electrophoresis. ISSN 0173-0835. 23(2), s. 176–181.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2002). Fractal signature vectors and lacunarity class distance matrices to extract new adaptive texture features from cell nuclei. Mathematics and bioscience in interaction. Fractals in biology and medicine. 3, s. 55–65.
  • Nielsen, Birgitte; Albregtsen, Fritz; Kildal, Wanja & Danielsen, Håvard E. (2001). Prognostic classification of early ovarian cancer based on very low dimensionality adaptive texture feature vectors from cell nuclei from monolayers and histological sections. Analytical Cellular Pathology. ISSN 0921-8912. 23, s. 75–88.
  • Albregtsen, Fritz & Nielsen, Birgitte (2000). Texture classification based on cooccurrence of gray level run length matrices. Australian Journal of Intelligent Information Processing Systems. ISSN 1321-2133. 6(1), s. 38–45.
  • Baheerathan, Sivalingam; Albregtsen, Fritz & Danielsen, Håvard E. (1999). New texture features based on the complexity curve. Pattern Recognition. ISSN 0031-3203. 32, s. 605–618.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (1999). The use of Fractal Features from the Periphery of Cell Nuclei as a Classification Tool. Analytical Cellular Pathology. ISSN 0921-8912. 19(1), s. 21–37.
  • Kristensen, Gunnar B.; Liestøl, Knut; Vlatkovic, L.; Reith, Albrecht; Albregtsen, Fritz & Danielsen, Håvard E. (1998). A review of caveats in statistical nuclear image analysis. Analytical Cellular Pathology. ISSN 0921-8912. 16, s. 63–82.
  • Yogesan, Kanagasingam; Schulerud, Helene; Albregtsen, Fritz & Danielsen, Håvard E. (1998). Ultrastrctural texture analysis as a diagnostic tool in mouse liver carcinogenesis. Ultrastructural Pathology. ISSN 0191-3123. s. 27–37.
  • Baheerathan, Sivalingam; Albregtsen, Fritz & Danielsen, Håvard E. (1998). Registration of serial sections of mouse liver cell nuclei. Journal of Microscopy. ISSN 0022-2720. 192, s. 37–53.
  • Yang, Luren; Albregtsen, Fritz & Taxt, Torfinn (1997). Fast computation of three-dimensional geometric moments using a discrete divergence theorem and a generalization to higher dimensions. Graphical Models and Image Processing. ISSN 1077-3169. 59(2), s. 97–108.
  • Yogesan, Kanagasingam; Jørgensen, Trond; Albregtsen, Fritz; Tveter, Kjell & Danielsen, Håvard E. (1996). Entropy-based texture analysis of chromatin structure in advanced prostate cancer. Cytometry. ISSN 0196-4763. 24, s. 268–276.
  • Yang, Luren & Albregtsen, Fritz (1996). Fast and exact computation of Cartesian geometric moments using discrete Green's theorem. Pattern Recognition. ISSN 0031-3203. 29(7), s. 1061–1073.
  • Yang, Luren; Albregtsen, Fritz; Lønnestad, T; Grøttum, Per; Iversen, Jens Gustav & Røtnes, Jan Sigurd [Vis alle 7 forfattere av denne artikkelen] (1995). Measuring shape and motion of white blood cells from a sequence of fluorescence microscopy images. I Borgefors, G (Red.), Theory and applications of image analysis II. World Scientific, Singapore. s. 305–316.
  • Albregtsen, Fritz; Schulerud, Helene & Yang, Luren (1995). Texture classification of mouce liver cell nuclei using invariant moments of consistent regions. I Hlavac, V & Sara, R (Red.), Lecture Notes in Computer Science. s. 496–502.

Se alle arbeider i Cristin

  • Albregtsen, Fritz & Skagestein, Gerhard (2007). Digital representasjon av tekster, tall, former, lyd, bilder og video, 2. utgave. Unipub forlag. ISBN 978-82-7477-318-9. 387 s.
  • Albregtsen, Fritz & Skagestein, Gerhard (2006). Digital representasjon av tekster, tall, former, lyd, bilder og video. Unipub forlag. ISBN 82-7477-265-2. 387 s.

Se alle arbeider i Cristin

  • Holmen, Sigve Dhondup; Kleppa, Elisabeth; Lillebø, Kristine; Taylor, M.; Albregtsen, Fritz & Kjetland, Eyrun Floerecke (2013). Diagnosing female genital schistosomiasis. Tropical medicine & international health. ISSN 1360-2276. 18, s. 56–56.
  • Holmen, Sigve Dhondup; Kleppa, Elisabeth; Lillebø, Kristine; Moodley, Jayeshnee; Taylor, Myra & Albregtsen, Fritz [Vis alle 9 forfattere av denne artikkelen] (2013). A Novel, Diagnostic Tool for Female Genital Schistosomiasis in Low-Resource Settings.
  • Holmen, Sigve Dhondup; Kleppa, Elisabeth; Lillebø, Kristine; Taylor, Myra; Albregtsen, Fritz & Kjetland, Eyrun Flørecke (2013). Diagnosing Female Genital Schistosomiasis.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Edwin, Bjørn & Elle, Ole Jakob (2013). Novel blood vessel segmentation method.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Langø, Thomas; Edwin, Bjørn & Elle, Ole Jakob (2013). 3D multiscale vessel enhancement based centerline extraction of blood vessels.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz; Reimers, Martin; Langø, Thomas & Elle, Ole Jakob (2012). A faster centreline tracking of blood vessels.
  • Kumar, Rahul Prasanna; Albregtsen, Fritz & Elle, Ole Jakob (2012). 3D blood vessel centreline extraction for catheter based navigation.
  • Holmen, Sigve; Lillebø, Kristine; Kleppa, Elisabeth; Kjetland, Eyrun Flørecke & Albregtsen, Fritz (2012). Computerized image analysis as a tool for identification of clinical manifestations in Female Genital Schistosomiasis.
  • Nielsen, B; Albregtsen, Fritz & Danielsen, Håvard Emil (2010). AUTOMATIC SEGMENTATION OF CELL NUCLEI IN HISTOLOGICAL SECTIONS. Cellular Oncology. ISSN 1570-5870. 32(3), s. 180–180.
  • Dunn, J. M.; Lovat, L. B.; Pretorius, M; Oukrif, D.; Hveem, Tordis & Nielsen, Bettina [Vis alle 9 forfattere av denne artikkelen] (2010). COMBINATION OF NUCLEAR TEXTURAL ANALYSIS AND IMAGE CYTOMETRIC DNA ANALYSIS IS MORE ACCURATE THAN IMAGE CYTOMETRIC DNA PLOIDY ANALYSIS ALONE FOR RISK STRATIFICATION IN BARRETT'S OESOPHAGUS. Gut. ISSN 0017-5749. 59, s. A114–A115. doi: 10.1136/gut.2009.208983r.
  • Albregtsen, Fritz (2009). How to calculate the goodness-of-fit of a fractal dimension. Cellular Oncology. ISSN 1570-5870. 31(6), s. 501–501. doi: 10.3233/CLO-2009-0506.
  • Nielsen, B; Albregtsen, Fritz & Danielsen, HE (2008). A review of statistical nuclear texture analysis in cancer research. Cellular Oncology. ISSN 1570-5870. 30, s. 165–165.
  • Cvancarova, Milada & Albregtsen, Fritz (2007). Towards a method to compare and evaluate segmentation results of image processing methods applied on medical images. International Journal of Computer Assisted Radiology and Surgery. ISSN 1861-6410. 2.
  • Cvankarova, Milada; Albregtsen, Fritz; Braband, Knut & Samset, Eigil (2005). Segmentation of ultrasound images of liver tumors applying snake algorithms and GVF.
  • Akbari, Akbar & Albregtsen, Fritz (2004). Evaluation of Noise in DNA Fingerprint Images Produced by Hybridization Techniques.
  • Akbari, Akbar & Albregtsen, Fritz (2004). Automatic Lane Detection and Separation in One Dimensional DNA gel images.
  • Akbari, Akbar & Albregtsen, Fritz (2004). Automatic segmentation of DNA bands in one dimensional gel images produced by hybridizing techniques.
  • Nielsen, Birgitte & Albregtsen, Fritz (2004). Fractal analysis of monolayer cell nuclei from two different prognostic classes of early ovarian cancer.
  • Albregtsen, Fritz & Schulerud, Helene (2003). Leave-one-out classification error estimation in high dimensional feature spaces - the usual way, and the right way.
  • Albregtsen, Fritz & Nygreen, Thomas (2003). On the variability of the CCR in ML classification.
  • Baheerathan, Sivalingam; Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2003). Complexity graylevel matrix - a new texture analysis method.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2003). Local binary pattern matrix - a new approach to nuclear texture analysis.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2003). Nuclear texture analysis of two different prognostic classes of early ovarian cancer based on gray level entropy matrices.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2002). Computing adaptive fractal features from gray level images of cell nuclei.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2002). A compact set of adaptive features from cooccurrence of gray level run length matrices.
  • Schulerud, Helene & Albregtsen, Fritz (2002). Effects of many feature candidates in feature selection and classification.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2002). Two adaptive texture features based on multidimensional gray level cooccurrence marices.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2002). Statistical texture analysis - robustness versus number of gray levels.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2002). Transforming 2D images to 1D signals to obtain radially differentiated fractal features from early ovarian cancer cell nuclei.
  • Albregtsen, Fritz & Nielsen, Birgitte (2002). Adaptive low dimensional texture features from fractal signature vectors and lacunarity matrices.
  • Akbari, Akbar & Albregtsen, Fritz (2002). Normalizing Background Trend in One-Dimensional DNA Fingerprint Images.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2001). A unified approach to low dimensionality adaptive texture feature extraction applied to ovarian cancer prognosis estimation.
  • Nielsen, Birgitte; Albregtsen, Fritz; Kildal, Wanja & Danielsen, Håvard E. (2001). The extraction of low dimensionality adaptive texture feature vectors from the periphery and center of ovarian cell nuclei from monolayers and histological sections.
  • Akbari, Akbar; Albregtsen, Fritz & Lingjærde, Ole Christian (2001). ADAPTIVE WEIGHTED LEAST SQUARES METHOD FOR ESTIMATION OF DNA FRAGMENT LENGHTS FROM AGAROS GELS.
  • Akbari, Akbar & Albregtsen, Fritz (2001). BACKGROUND NORMALIZATION OF DNA FINGERPRINT IMAGES.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (2000). Using fractal signature vectors and lacunarity distance matrices to extract new adaptive features from cell nuclei.
  • Nielsen, Birgitte; Albregtsen, Fritz; Baheerathan, Sivalingam & Danielsen, Håvard E. (2000). Peel-off-scanning to obtain radial differentiation of fractal and complexity features in cell nuclei.
  • Nielsen, Birgitte; Albregtsen, Fritz; Baheerathan, Sivalingam & Danielsen, Håvard E. (2000). Peel-off-scanning to obtain radial differentiation of fractal and complexity features in cell nuclei.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2000). Adaptive gray level run length features obtained from class distance matrices.
  • Albregtsen, Fritz; Nielsen, Birgitte & Danielsen, Håvard E. (2000). Adaptive gray level run length features obtained from class distance matrices.
  • Yang, Luren; Albregtsen, Fritz; Lønnestad, Tor; Grøttum, Per & Borgefors, Gunilla (1999). Measuring shape and motion of white blood cells from sequences of fluorescence microskopy.
  • Nielsen, Birgitte; Albregtsen, Fritz & Danielsen, Håvard E. (1999). Diagnostic classification based on fractal features in the periphery of cell nuclei from liver lesions.
  • Schulerud, Helene; Kristensen, Gunnar B.; Albregtsen, Fritz; Liestøl, Knut & Danielsen, Håvard E. (1997). Prognosis of cervix cancer.
  • Yang, Luren; Albregtsen, Fritz; Lønnestad, Tor; Grøttum, Per; Hlavác, Václav & Sára, Radim (1996). A supervised approach to the evaluation of image segmentation methods.
  • Schulerud, Helene; Kristensen, Gunnar B.; Albregtsen, Fritz; Liestøl, Knut & Danielsen, Håvard E. (1996). Prognosis of cervix cancer using texture analysis.

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Publisert 4. nov. 2010 13:43 - Sist endret 13. okt. 2023 11:00

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