RSS feed

Publications by Fritz Albregtsen

98 publications found

Original articles

Nainamalai V, Prasad PJR, Pelanis E, Edwin B, Albregtsen F, Elle OJ, P Kumar R (2022)
Evaluation of clinical applicability of automated liver parenchyma segmentation of multi-center magnetic resonance images
Eur J Radiol Open, 9, 100448
DOI 10.1016/j.ejro.2022.100448, PubMed 36386761

Prasad PJR, Survarachakan S, Khan ZA, Lindseth F, Elle OJ, Albregtsen F, Kumar RP (2021)
Numerical Evaluation on Parametric Choices Influencing Segmentation Results in Radiology Images-A Multi-Dataset Study
Electronics, 10 (4), 431
DOI 10.3390/electronics10040431

Kleppe A, Albregtsen F, Trovik J, Kristensen GB, Danielsen HE (2020)
Prognostic Value of the Diversity of Nuclear Chromatin Compartments in Gynaecological Carcinomas
Cancers (Basel), 12 (12)
DOI 10.3390/cancers12123838, PubMed 33352679

Skrede OJ, De Raedt S, Kleppe A, Hveem TS, Liestøl K, Maddison J, Askautrud HA, Pradhan M, Nesheim JA, Albregtsen F, Farstad IN, Domingo E, Church DN, Nesbakken A, Shepherd NA, Tomlinson I, Kerr R, Novelli M, Kerr DJ, Danielsen HE (2020)
Deep learning for prediction of colorectal cancer outcome: a discovery and validation study
Lancet, 395 (10221), 350-360
DOI 10.1016/S0140-6736(19)32998-8, PubMed 32007170

Nielsen B, Kleppe A, Hveem TS, Pradhan M, Syvertsen RA, Nesheim JA, Kristensen GB, Trovik J, Kerr DJ, Albregtsen F, Danielsen HE (2018)
Association Between Proportion of Nuclei With High Chromatin Entropy and Prognosis in Gynecological Cancers
J Natl Cancer Inst, 110 (12), 1400-1408
DOI 10.1093/jnci/djy063, PubMed 29684152

Kleppe A, Albregtsen F, Vlatkovic L, Pradhan M, Nielsen B, Hveem TS, Askautrud HA, Kristensen GB, Nesbakken A, Trovik J, Wæhre H, Tomlinson I, Shepherd NA, Novelli M, Kerr DJ, Danielsen HE (2018)
Chromatin organisation and cancer prognosis: a pan-cancer study
Lancet Oncol, 19 (3), 356-369
DOI 10.1016/S1470-2045(17)30899-9, PubMed 29402700

Kumar RP, Barkhatov L, Edwin B, Albregtsen F, Elle OJ (2018)
Portal and Hepatic Vein Segmentation with Leak Restriction: A Pilot Study
IFMBE PROC, 65, 823-826
DOI 10.1007/978-981-10-5122-7_206

Kumar R, Barkhatov L, Edwin B, Albregtsen F, Elle OJ (2017)
Portal and Hepatic Vein Segmentation with Leak Restriction: A Pilot Study
IFMBE Proc, 0, 823-826
PublikaID 330

Hveem TS, Njølstad TS, Nielsen B, Syvertsen RA, Nesheim JA, Kjæreng ML, Kildal W, Pradhan M, Marcickiewicz J, Tingulstad S, Staff AC, Haugland HK, Eraker R, Oddenes K, Rokne JA, Tjugum J, Lode MS, Amant F, Werner HM, Bjørge L, Albregtsen F, Liestøl K, Salvesen HB, Trovik J, Danielsen HE et al. (2016)
Changes in Chromatin Structure in Curettage Specimens Identifies High-Risk Patients in Endometrial Cancer
Cancer Epidemiol Biomarkers Prev, 26 (1), 61-67
DOI 10.1158/1055-9965.EPI-16-0215, PubMed 27587790

Hveem TS, Kleppe A, Vlatkovic L, Ersvær E, Wæhre H, Nielsen B, Kjær MA, Pradhan M, Syvertsen RA, Nesheim JA, Liestøl K, Albregtsen F, Danielsen HE (2016)
Chromatin changes predict recurrence after radical prostatectomy
Br J Cancer, 114 (11), 1243-50
DOI 10.1038/bjc.2016.96, PubMed 27124335

Holmen S, Galappaththi-Arachchige HN, Kleppa E, Pillay P, Naicker T, Taylor M, Onsrud M, Kjetland EF, Albregtsen F (2016)
Characteristics of Blood Vessels in Female Genital Schistosomiasis: Paving the Way for Objective Diagnostics at the Point of Care
PLoS Negl Trop Dis, 10 (4), e0004628
DOI 10.1371/journal.pntd.0004628, PubMed 27073857

Landmark K, Solberg AHS, Albregtsen F, Austeng A, Hansen RE (2015)
A Radon-Transform-Based Image Noise Filter-With Applications to Multibeam Bathymetry
IEEE Trans. Geosci. Remote Sensing, 53 (11), 6252-6273
DOI 10.1109/TGRS.2015.2436380

Holmen SD, Kleppa E, Lillebø K, Pillay P, van Lieshout L, Taylor M, Albregtsen F, Vennervald BJ, Onsrud M, Kjetland EF (2015)
The first step toward diagnosing female genital schistosomiasis by computer image analysis
Am J Trop Med Hyg, 93 (1), 80-86
DOI 10.4269/ajtmh.15-0071, PubMed 25918212

Holmen SD, Kjetland EF, Taylor M, Kleppa E, Lillebø K, Gundersen SG, Onsrud M, Albregtsen F (2015)
Colourimetric image analysis as a diagnostic tool in female genital schistosomiasis
Med Eng Phys, 37 (3), 309-14
DOI 10.1016/j.medengphy.2014.12.007, PubMed 25630808

Kumar RP, Albregtsen F, Reimers M, Edwin B, Lango T, Elle OJ (2015)
Blood Vessel Segmentation and Centerline Tracking Using Local Structure Analysis
IFMBE PROC, 45, 122-+
DOI 10.1007/978-3-319-11128-5_31

Nielsen B, Hveem TS, Kildal W, Abeler VM, Kristensen GB, Albregtsen F, Danielsen HE (2014)
Entropy-based adaptive nuclear texture features are independent prognostic markers in a total population of uterine sarcomas
Cytometry A, 87 (4), 315-25
DOI 10.1002/cyto.a.22601, PubMed 25483227

Kumar RP, Albregtsen F, Reimers M, Edwin B, Langø T, Elle OJ (2014)
Three-Dimensional Blood Vessel Segmentation and Centerline Extraction based on Two-Dimensional Cross-Section Analysis
Ann Biomed Eng, 43 (5), 1223-34
DOI 10.1007/s10439-014-1184-4, PubMed 25398332

Simone G, Audino G, Farup I, Albregtsen F, Rizzi A (2014)
Termite Retinex: a new implementation based on a colony of intelligent agents
J. Electron. Imaging, 23 (1), 013006
DOI 10.1117/1.JEI.23.1.013006

Kumar RP, Albregtsen F, Reimers M, Lango T, Edwin B, Elle OJ (2013)
3D multiscale vessel enhancement based centerline extraction of blood vessels
PROC SPIE, 8669, 86691X
DOI 10.1117/12.2006779

Nielsen B, Albregtsen F, Danielsen HE (2012)
Automatic segmentation of cell nuclei in Feulgen-stained histological sections of prostate cancer and quantitative evaluation of segmentation results
Cytometry A, 81 (7), 588-601
DOI 10.1002/cyto.a.22068, PubMed 22605528

Nielsen B, Albregtsen F, Kildal W, Abeler VM, Kristensen GB, Danielsen HE (2012)
The prognostic value of adaptive nuclear texture features from patient gray level entropy matrices in early stage ovarian cancer
Anal Cell Pathol (Amst), 35 (4), 305-14
DOI 10.3233/ACP-2012-0065, PubMed 22596183

Dunn JM, Hveem T, Pretorius M, Oukrif D, Nielsen B, Albregtsen F, Lovat LB, Novelli MR, Danielsen HE (2011)
Comparison of nuclear texture analysis and image cytometric DNA analysis for the assessment of dysplasia in Barrett's oesophagus
Br J Cancer, 105 (8), 1218-23
DOI 10.1038/bjc.2011.353, PubMed 21934680

Akbari A, Albregtsen F, Jakobsen KS (2010)
Automatic lane detection and separation in one dimensional gel images using continuous wavelet transform
Anal. Methods, 2 (9), 1360-1371
DOI 10.1039/c0ay00167h

Pedersen M, Bonnier N, Hardeberg JY, Albregtsen F (2010)
Validation of Quality Attributes for Evaluation of Color Prints
COLOR IMAG CONF, 74-79

Pedersen M, Bonnier N, Hardeberg JY, Albregtsen F (2010)
Estimating Print Quality Attributes by Image Quality Metrics
COLOR IMAG CONF, 68-73

Pedersen M, Bonnier N, Hardeberg JY, Albregtsen F (2010)
Attributes of image quality for color prints
J. Electron. Imaging, 19 (1), 011016
DOI 10.1117/1.3277145

Akbari A, Marthinsen G, Lifjeld JT, Albregtsen F, Wennerberg L, Stenseth NC, Jakobsen KS (2008)
Improved DNA fragment length estimation in capillary electrophoresis
Electrophoresis, 29 (6), 1273-85
DOI 10.1002/elps.200700523, PubMed 18288778

Cvancarova M, Albregtsen F, Brabrand K, Samset E (2005)
Segmentation of ultrasound images of liver tumors applying snake algorithms and GVF
Int. Congr. Ser., 1281, 218-223
DOI 10.1016/j.ics.2005.03.190

Nielsen B, Albregtsen F, Danielsen HE (2005)
Fractal analysis of monolayer cell nuclei from two different prognostic classes of early ovarian cancer
MATH BIOSCI INTERACT, 175-186
DOI 10.1007/3-7643-7412-8_16

Schulerud H, Albregtsen F (2004)
Many are called, but few are chosen. Feature selection and error estimation in high dimensional spaces
Comput Methods Programs Biomed, 73 (2), 91-9
DOI 10.1016/s0169-2607(03)00018-x, PubMed 14757253

Nielsen B, Albregtsen F, Danielsen HE (2004)
Low dimensional adaptive texture feature vectors from class distance and class difference matrices
IEEE Trans Med Imaging, 23 (1), 73-84
DOI 10.1109/TMI.2003.819923, PubMed 14719689

Akbari A, Albregtsen F (2004)
Automatic segmentation of DNA bands in one dimensional gel images produced by hybridizing techniques
P ANN INT IEEE EMBS, 26, 2852-2855

Akbari A, Albregtsen F (2004)
Automatic segmentation of DNA bands in one dimensional gel images produced by hybridizing techniques
Conf Proc IEEE Eng Med Biol Soc, 2004, 2852-5
DOI 10.1109/IEMBS.2004.1403813, PubMed 17270872

Akbari A, Albregtsen F (2004)
Evaluation of noise in DNA fingerprint images produced by hybridization techniques
HELS UNIV TECHNOL S, 46, 61-64

Akbari A, Albregtsen F (2003)
Normalizing the background and removing the trend in one-dimensional DNA fingerprint images
J Chromatogr A, 1014 (1-2), 11-9
DOI 10.1016/s0021-9673(03)00577-6, PubMed 14558607

Akbari A, Albregtsen F, Lingjaerde OC (2002)
Adaptive weighted least squares method for the estimation of DNA fragment lengths from agarose gels
Electrophoresis, 23 (2), 176-81
DOI 10.1002/1522-2683(200202)23:2<176::AID-ELPS176>3.0.CO;2-1, PubMed 11840520

Nielsen B, Albregtsen F, Danielsen HE (2002)
Fractal Signature Vectors and Lacunarity Class Distance Matrices to extract new adaptive texture features from cell nuclei
MATH BIOSCI INTERAC, 55-65

Nielsen B, Albregtsen F, Kildal W, Danielsen HE (2001)
Prognostic classification of early ovarian cancer based on very low dimensionality adaptive texture feature vectors from cell nuclei from monolayers and histological sections
Anal Cell Pathol, 23 (2), 75-88
DOI 10.1155/2001/683747, PubMed 11904463

Albregtsen F, Nielsen B, Danielsen HE (2000)
Adaptive gray level run length features from class distance matrices
INT C PATT RECOG, 738-741

Baheerathan S, Albregtsen F, Danielsen HE (1999)
New texture features based on the complexity curve
Pattern Recognit., 32 (4), 605-618
DOI 10.1016/S0031-3203(98)00122-8

Nielsen B, Albregtsen F, Danielsen HE (1999)
The use of fractal features from the periphery of cell nuclei as a classification tool
Anal Cell Pathol, 19 (1), 21-37
DOI 10.1155/1999/986086, PubMed 10661622

Baheerathan S, Albregtsen F, Danielsen HE (1998)
Registration of serial sections of mouse liver cell nuclei
J Microsc, 192 (Pt 1), 37-53
DOI 10.1046/j.1365-2818.1998.00405.x, PubMed 9848269

Yogesan K, Schulerud H, Albregtsen F, Danielsen HE (1998)
Ultrastructural texture analysis as a diagnostic tool in mouse liver carcinogenesis
Ultrastruct Pathol, 22 (1), 27-37
DOI 10.3109/01913129809032255, PubMed 9491213

Yang L, Albregtsen F, Taxt T (1997)
Fast computation of three-dimensional geometric moments using a discrete divergence theorem and a generalization to higher dimensions
Graph. Models Image Process., 59 (2), 97-108
DOI 10.1006/gmip.1997.0418

Schulerud H, Kristensen GB, Vlatkovic L, Albregtsen F, Liestol K, Danielsen HE (1997)
Prognosis of cervical cancer using image analysis of cell nuclei.
SCIA '97 - PROCEEDINGS OF THE 10TH SCANDINAVIAN CONFERENCE ON IMAGE ANALYSIS, VOLS 1 AND 2, 651-658

Yang L, Taxt T, Albregtsen F (1997)
Bottom detection for multibeam sonars with active contours
OCEANS '97 MTS/IEEE CONFERENCE PROCEEDINGS, VOLS 1 AND 2, 943-950
DOI 10.1109/OCEANS.1997.624118

Yogesan K, Jørgensen T, Albregtsen F, Tveter KJ, Danielsen HE (1996)
Entropy-based texture analysis of chromatin structure in advanced prostate cancer
Cytometry, 24 (3), 268-76
DOI 10.1002/(SICI)1097-0320(19960701)24:3<268::AID-CYTO10>3.0.CO;2-O, PubMed 8800560

Yang LR, Albregtsen F (1996)
Fast and exact computation of Cartesian geometric moments using discrete Green's theorem
Pattern Recognit., 29 (7), 1061-1073
DOI 10.1016/0031-3203(95)00147-6

YANG L, ALBREGTSEN F (1994)
FAST COMPUTATION OF INVARIANT GEOMETRIC MOMENTS - A NEW METHOD GIVING CORRECT RESULTS
INT C PATT RECOG, 201-204

ALBREGTSEN F, NIELSEN B, YOGESAN K (1992)
FRACTAL DIMENSION, ONLY A FRACTION OF THE TRUTH
11TH IAPR INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION, PROCEEDINGS, VOL III: CONFERENCE C: IMAGE, SPEECH, AND SIGNAL ANALYSIS, 733-736
DOI 10.1109/ICPR.1992.202091

VOKAC M, ALBREGTSEN F (1992)
COMPRESSION OF 2-D SOLAR SPECTRAL IMAGES BY ADAPTIVE PIECEWISE-LINEAR APPROXIMATION
11TH IAPR INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION, PROCEEDINGS, VOL III: CONFERENCE C: IMAGE, SPEECH, AND SIGNAL ANALYSIS, 65-69
DOI 10.1109/ICPR.1992.201929

ALBREGTSEN F, ANDERSEN BN (1985)
THE EFFECT OF SPATIAL SMEARING ON SOLAR DOPPLER MEASUREMENTS .1. MATHEMATICAL FORMULATION AND APPLICATION TO MEASUREMENTS OF SOLAR ROTATION
Sol. Phys., 95 (2), 239-249
DOI 10.1007/BF00152401

MALTBY P, ALBREGTSEN F, MOE OK, KURUCZ R, AVRETT E (1984)
SOLAR-CYCLE TEMPERATURE-VARIATIONS IN SUNSPOTS
LECT NOTES PHYS, 193, 176-179

ALBREGTSEN F, JORAS PB, MALTBY P (1984)
LIMB-DARKENING AND SOLAR-CYCLE VARIATION OF SUNSPOT INTENSITIES
Sol. Phys., 90 (1), 17-30
DOI 10.1007/BF00153781

ALBREGTSEN F, MALTBY P (1981)
SOLAR-CYCLE VARIATION OF SUNSPOT INTENSITY
Sol. Phys., 71 (2), 269-283
DOI 10.1007/BF00167551

ALBREGTSEN F, MALTBY P (1981)
ON THE NEED FOR SPACE OBSERVATIONS OF THE UMBRA-PHOTOSPHERE INTENSITY RATIO
Sol. Phys., 74 (1), 147-151
DOI 10.1007/BF00151284

MALTBY P, ALBREGTSEN F (1979)
SOLAR-CYCLE VARIATION OF SUNSPOT INTENSITY AND X-RAY BRIGHT POINTS
Astrophys. J., 234 (2), L147-L149
DOI 10.1086/183127

ALBREGTSEN F, MALTBY P (1978)
NEW LIGHT ON SUNSPOT DARKNESS AND SOLAR-CYCLE
Nature, 274 (5666), 41-42
DOI 10.1038/274041a0

Review articles

Nielsen B, Albregtsen F, Danielsen HE (2008)
Statistical nuclear texture analysis in cancer research: a review of methods and applications
Crit Rev Oncog, 14 (2-3), 89-164
DOI 10.1615/critrevoncog.v14.i2-3.10, PubMed 19409060

Schulerud H, Kristensen GB, Liestøl K, Vlatkovic L, Reith A, Albregtsen F, Danielsen HE (1998)
A review of caveats in statistical nuclear image analysis
Anal Cell Pathol, 16 (2), 63-82
DOI 10.1155/1998/436382, PubMed 9692681

Other articles

Prasad PJR, Elle OJ, Lindseth F, Albregtsen F, Kumar RP (2021)
Modifying U-Net for small dataset - a simplified U-Net version for Liver Parenchyma segmentation
PROC SPIE, 11597, 115971O
DOI 10.1117/12.2582179

Albregtsen F (2009)
How to calculate the goodness-of-fit of a fractal dimension
Cell Oncol, 31 (6), 501
DOI 10.3233/CLO-2009-0506, PubMed 19940365

ALBREGTSEN F, HANSEN TL (1977)
WAVELENGTH DEPENDENCE OF GRANULATION (0.38-2.4 MU)
Sol. Phys., 54 (1), 31-33
DOI 10.1007/BF00146421

Books

Albregtsen F, Skagestein G (2007)
Digital representasjon: av tekster, tall, former, lyd, bilder og video
Unipub, [Oslo] (2. utg.), X, 387 s.
BIBSYS 071073787, ISBN 978-82-7477-318-9

Albregtsen F, Skagestein G (2006)
Digital representasjon: av tekster, tall, former, lyd, bilder og video
Unipub, [Oslo], X, 387 s.
BIBSYS 061304166, ISBN 978-82-7477-265-6

Foyn BM, Albregtsen F, Wang X (1995)
Segmentation of halftone dots and dirt particles
In Meddelelse, Instituttet, Oslo, nr 350/95, [10] bl.
BIBSYS 961325143

Wang X, Albregtsen F, Foyn BM (1994)
Texture features from gray level gap length matrix
In Meddelelse, Instituttet, Oslo, nr 330, [4] bl.
BIBSYS 961113855

Wang X, Albregtsen F, Foyn BM (1994)
Gray level gap length matrix: a new approach for texture analysis
In Meddelelse, Instituttet, Oslo, nr 338, [5] bl.
BIBSYS 981621295

Wang X, Foyn BM, Albregtsen F (1994)
An automatic tree ring measurement system
In Meddelelse, Instituttet, Oslo, nr 337, [4] bl.
BIBSYS 980269083

Johnsen H, Albregtsen F (1990)
Tillegg til NOBIM`s litteraturoversikt innen bildebehandling og mønstergjenkjenning
In Rapport, Laboratoriet, [Oslo], 45, 36 s.
BIBSYS 930643488, ISBN 82-7476-049-2

Graf Ø, Albregtsen F, Lønnestad T (1988)
An evaluation of adaptive noise filters applied on solar photographic UV-spectra
In Rapport, Laboratoriet, [Oslo], 30, 21 s.
BIBSYS 930617401, ISBN 82-7476-033-6

Albregtsen F (1986)
Astronomisk bildebehandling ved NAVF`s bildebehandlingslaboratorium: innlegg ved NOBIM-konferansen, Bergen 9-10. juni, 1986
In Rapport, Laboratoriet, [Oslo], 32 s.
BIBSYS 930640373

Albregtsen F, Andersen BN (1985)
The effect of spatial smearing on solar Doppler measurements, 1, Mathematical formulation and application to measurements of solar rotation
In Reprints, The Institute, [Oslo], no. 205, S. 239-249
BIBSYS 061569496

Albregtsen F (1985)
En oversikt over norske fagmiljøer innen bildebehandling og mønstergjenkjenning
In Rapport, Laboratoriet, [Oslo], 75 s.
BIBSYS 930640500

Albregtsen F, Jorås PB, Maltby P (1984)
Limb-darkening and solar cycle variation of sunspot intensities
In Reprints, The Institute, [Oslo], no. 201, S. 17-30
BIBSYS 061567035

Albregtsen F (1984)
Håndbok for bruk av videoprinteren Matrix 3000
In Rapport, Laboratoriet, [Oslo], 1984, 15 s.
BIBSYS 930640977

Albregtsen F (1983)
ALIP, Average Limb Intensity Profile, a part of the program package to handle sunspot intensity observations at the Solar Observatory
In Intern rapport, Instituttet, Oslo, no. 24 (July 1983), [2], 25 s.
BIBSYS 061884634

Albregtsen F, Maltby P (1981)
Solar cycle variations of sunspot intensity
In Reprints, The Institute, [Oslo], no. 192, S. 269-283
BIBSYS 061562343

Albregtsen F, Maltby P (1981)
On the need for space observations of the umbra/photosphere intensity ratio
In Reprints, The Institute, [Oslo], no. 194, S. 147-151
BIBSYS 061562602

Albregtsen F, Engvold O (1979)
High resolution Ca II K spectra of the September 8, 1977 loop system
In Reprints, The Institute, [Oslo], no. 178, S. 248-249
BIBSYS 061554170

Albregtsen F (1979)
CONTP, a subroutine for plotting contours
In Intern rapport, Instituttet, Oslo, no. 14 (June 1979), [4], 26 s.
BIBSYS 041981278

Albregtsen F (1979)
A four-channel infrared pinhole photometer for solar intensity observations / by Fritz Albregtsen
In Report, Universitetsforlaget, Oslo, no. 51, 20 bl.
BIBSYS 82202621x

Albregtsen F, Andersen BN (1979)
SOLOBS 3, a collection of subroutines to read observed data from magnetic tape
In Intern rapport, Instituttet, Oslo, no. 12 (April 1979), [4], 19 s.
BIBSYS 041981618

Albregtsen F, Andersen BN (1978)
Program SPOBS, et program for observasjon med spektrografen, Solobservatoriet på Harestua
In Intern rapport, Instituttet, Oslo, nr. 11 (November 1978), [4], 20 s.
BIBSYS 04198188x

Albregtsen F, Maltby P (1978)
Solflekkforskningen, før og nå
In Småtrykk, Instituttet, Oslo, nr. 97, S. 157-166
BIBSYS 822024578

Albregtsen F, Maltby P (1978)
New light on sunspot darkness and the solar cycle
In Reprints, The Institute, [Oslo], no. 171, S. 41-42
BIBSYS 061552658

Albregtsen F (1978)
Program SKTCH, tegning av det heliografiske gradnett og beregning av heliografiske koordinater
In Intern rapport, Instituttet, Oslo, nr. 10 (August 1978), [4], 19 s.
BIBSYS 041981944

Albregtsen F (1977)
Dokumentasjon av programmer vedrørende observasjoner av solar granulasjon
In Intern rapport, Instituttet, Oslo, nr. 7 (Januar 1977), [4], 44 s.
BIBSYS 041981766

Albregtsen F, Hansen TL (1977)
The wavelength dependence of grabulation (0.38-2.4 μm)
In Reprints, The Institute, [Oslo], no. 165, S. 31-33
BIBSYS 06155197x

Albregtsen F (1977)
SOLOBS 2, Matematiske subprogrammer
In Intern rapport, Instituttet, Oslo, nr. 8 (November 1977), [3], 47 s.
BIBSYS 061884308

Albregtsen F (1976)
Observasjons-, reduksjons- og korreksjonsprogrammer for solflekker
In Intern rapport, Instituttet, Oslo, nr. 6 (Juni 1976), [2], 71 s.
BIBSYS 061884286

Albregtsen F, Hansen TL (1974)
The theoretical instrumental profile of the combination telescope-pinhole photometer and its effect upon observations of umbra intensities
In Report, Universitetsforlaget, Oslo, no. 42, 18 s.
BIBSYS 942377729

Book chapters

Kumar R, Albregtsen F, Reimers M, Langø T, Edwin B, Elle OJ (2013)
3D multiscale vessel enhancement based centerline extraction of blood vessels
In SPIE Medical Imaging, International Society for Optics and Photonics
DOI 10.1117/12.2006779, PublikaID 325

Albregtsen F, Nielsen B, Danielsen HE (2000)
Adaptive gray level run length features from class distance matrices
In Proceedings: en samling artikler og sammendrag fra NOBIM konferansen 2000, Statoil, Trondheim 6. og 7. juni 2000, NOBIM 2000-sekretariatet, Ås, S. 75-78
BIBSYS 02000477x

Albregtsen F, Sivalingam B (2000)
Peel-off-scanning to obtain radial differentiation of fractal and complexity features in cell nuclei
In Proceedings: en samling artikler og sammendrag fra NOBIM konferansen 2000, Statoil, Trondheim 6. og 7. juni 2000, NOBIM 2000-sekretariatet, Ås, S. 54-60
BIBSYS 020004362

Yang L, Albregtsen F, Lønnestad T, Grøttum P (1995)
A supervised approach to the evaluation of image segmentation methods
In Computer analysis of images and patterns: 6th international conference, CAIP '95, Prague, Czech Republic, September 6-8, 1995 : proceedings, Springer, Berlin, S. 759-765
BIBSYS 06159878x

Yang L, Albregtsen F, Taxt T (1995)
Fast computation of 3-D geometric moments using a discrete Gauss' theorem
In Computer analysis of images and patterns: 6th international conference, CAIP '95, Prague, Czech Republic, September 6-8, 1995 : proceedings, Springer, Berlin, S. 649-654
BIBSYS 061598909

Theses

Albregtsen F (1978)
Relative intensitets-målinger med et 4-kanals fotometer (_l = 1.54 - 2.35 μm)
F. Albregtsen, Oslo, 111 s.
BIBSYS 96171154x