{"id":6415,"date":"2026-10-19T09:48:53","date_gmt":"2026-10-19T09:48:53","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-andrea-rakel-sigurdardottir\/"},"modified":"2026-10-19T09:48:53","modified_gmt":"2026-10-19T09:48:53","slug":"doktorsvorn-i-heilbrigdisvisindum-andrea-rakel-sigurdardottir","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-andrea-rakel-sigurdardottir\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed heilbrig\u00f0isv\u00edsindum – Andrea Rakel Sigur\u00f0ard\u00f3ttir"},"content":{"rendered":"
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Mi\u00f0vikudaginn 10. september 2025 ver Andrea Rakel Sigur\u00f0ard\u00f3ttir doktorsritger\u00f0 s\u00edna \u00ed heilbrig\u00f0isv\u00edsindum vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: Sj\u00e1lfvirkar fj\u00f6llitr\u00f3fs- og myndgreiningar til g\u00e6\u00f0aeftirlits \u00e1 sj\u00e1varfangi. Automatic multispectral and imaging methods for quality monitoring of seafood.<\/p>\n

Andm\u00e6lendur eru dr. Frosti P\u00e1lsson, v\u00edsindama\u00f0ur hj\u00e1 deCode Genetics, og dr. Silje Ottestad, s\u00e9rfr\u00e6\u00f0ingur hj\u00e1 Maritech \u00ed Noregi.<\/p>\n

Umsj\u00f3narkennari og lei\u00f0beinandi var Mar\u00eda Gu\u00f0j\u00f3nsd\u00f3ttir, pr\u00f3fessor. Auk hennar s\u00e1tu \u00ed doktorsnefnd Hafsteinn Einarsson, d\u00f3sent, Hildur Inga Sveinsd\u00f3ttir, lektor og verkefnastj\u00f3ri hj\u00e1 Mat\u00eds, og Nette Schultz, Ph.D, Chief Innovation Officer (CINO) hj\u00e1 Videometer A\/S \u00ed Danm\u00f6rku.<\/p>\n

\u00d3lafur \u00d6gmundarson, d\u00f3sent og deildarforseti Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideildar, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 13.00.<\/p>\n

\u00c1grip <\/strong><\/p>\n

Sj\u00e1lfb\u00e6r n\u00fdting sj\u00e1varau\u00f0linda er forsenda \u00feess a\u00f0 tryggja frambo\u00f0 \u00e1 sj\u00e1varafur\u00f0um til lengri t\u00edma og til a\u00f0 vernda vistkerfi hafsins. \u00c1 sama t\u00edma er g\u00e6\u00f0a- og \u00f6ryggiseftirlit \u00ed gegnum alla vir\u00f0iske\u00f0juna fl\u00f3ki\u00f0 verkefni, \u00fear sem sj\u00e1varafur\u00f0ir eru vi\u00f0kv\u00e6mar, l\u00edffr\u00e6\u00f0ilegur fj\u00f6lbreytileiki mikill og \u00fe\u00e6r eru n\u00e6mar fyrir umhverfis\u00e1hrifum og me\u00f0h\u00f6ndlun. Hef\u00f0bundnar a\u00f0fer\u00f0ir eins og skynmat, sj\u00f3nr\u00e6nt mat og efnagreiningar eru vel \u00feekktar og gagnlegar en \u00fe\u00e6r eru oft t\u00edmafrekar, ey\u00f0ileggja s\u00fdnin e\u00f0a byggja \u00e1 hugl\u00e6gu mati.<\/p>\n

Auknar kr\u00f6fur um rekjanleika, gagns\u00e6i, g\u00e6\u00f0i afur\u00f0a og skilvirkari vinnslu kalla \u00e1 n\u00fdjar lausnir sem eru hlutl\u00e6gar, hra\u00f0virkar og valda ekki skemmdum \u00e1 s\u00fdnum.<\/p>\n

\u00cd \u00feessu verkefni var sko\u00f0a\u00f0ur m\u00f6guleikinn \u00e1 n\u00fdtingu myndgreiningart\u00e6kni, einkum fj\u00f6llitr\u00f3fsmyndgreiningar, \u00ed samspili vi\u00f0 efnat\u00f6lfr\u00e6\u00f0i, v\u00e9lr\u00e6nt n\u00e1m og dj\u00faptauganet, til a\u00f0 sj\u00e1lfvirkniv\u00e6\u00f0a g\u00e6\u00f0a- og eftirlitsverkefni innan sj\u00e1var\u00fatvegarins. Verkefni\u00f0 samanstendur af fj\u00f3rum v\u00edsindagreinum sem fjalla um mismunandi notkunarm\u00f6guleika \u00feessara t\u00e6knilausna: aldursgreining fiskikvarna, hringormagreiningu \u00ed hv\u00edtfiski, ferskleikamat \u00e1 heilum \u00feorski, og g\u00e6\u00f0amat \u00e1 br\u00fan\u00fe\u00f6rungum.<\/p>\n

Ni\u00f0urst\u00f6\u00f0urnar s\u00fdna a\u00f0 sam\u00fe\u00e6tting myndgreiningar og gagnadrifinna l\u00edkana b\u00fd\u00f0ur upp \u00e1 m\u00f6guleika til sj\u00e1lfvirkniv\u00e6\u00f0ingar og til a\u00f0 b\u00e6ta g\u00e6\u00f0a- og eftirlitsferla \u00ed sj\u00e1var\u00fatvegi. \u00dea\u00f0 er lj\u00f3st a\u00f0 t\u00e6knin b\u00fd\u00f0ur upp \u00e1 mikla m\u00f6guleika til frekari notkunar v\u00ed\u00f0s vegar um vir\u00f0iske\u00f0ju sj\u00e1varafur\u00f0a og opnar \u00feannig t\u00e6kif\u00e6ri til frekari ranns\u00f3kna og \u00fer\u00f3unar.\u00a0<\/p>\n

Abstract <\/strong><\/p>\n

Sustainable management of marine resources is essential to ensure long-term seafood availability and protect ocean ecosystems. At the same time, monitoring quality and safety throughout the seafood value chain remains challenging, as seafood is highly perishable, biologically diverse, and sensitive to environmental and handling conditions. Traditional methods, such as sensory evaluation, visual inspection, and laboratory analysis, are effective and well established but can be time-consuming, destructive, or subjective.<\/p>\n

As demands for traceability, transparency, product quality, and process efficiency grow, there is a clear need for objective, rapid, and non-destructive techniques.<\/p>\n

This thesis investigated the potential of imaging technologies, particularly multispectral imaging (MSI), combined with chemometrics, machine learning, and deep learning, to automate quality assessment and monitoring tasks in the seafood industry. The work comprises four scientific papers addressing different applications: age determination of fish otoliths, nematode detection in whitefish fillets, freshness assessment of whole cod, and quality evaluation of brown seaweed.<\/p>\n

Overall, the findings demonstrate that combining imaging with data-driven modelling can automate diverse quality and resource monitoring tasks in the seafood industry, with strong potential for wider application and opportunities for further research and technological development.\u00a0<\/p>\n

Um doktorsefni<\/strong><\/p>\n

Andrea Rakel Sigur\u00f0ard\u00f3ttir er f\u00e6dd \u00e1ri\u00f0 1992 \u00ed Reykjav\u00edk. H\u00fan lauk st\u00fadentspr\u00f3fi af n\u00e1tt\u00farufr\u00e6\u00f0ibraut fr\u00e1 Kvennask\u00f3lanum \u00e1ri\u00f0 2011. \u00c1ri\u00f0 2017 h\u00f3f h\u00fan n\u00e1m vi\u00f0 H\u00e1sk\u00f3la \u00cdslands og \u00fatskrifa\u00f0ist me\u00f0 B.Sc.pr\u00f3f \u00ed hugb\u00fana\u00f0arverkfr\u00e6\u00f0i \u00e1ri\u00f0 2020 og M.Sc.pr\u00f3f \u00ed reikniverkfr\u00e6\u00f0i \u00e1ri\u00f0 2022. Seinna sama \u00e1r h\u00f3f h\u00fan n\u00e1m vi\u00f0 Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands \u00ed \u00feverfaglegu doktorsn\u00e1mi. Samhli\u00f0a \u00fev\u00ed sinnti Andrea kennslu og lei\u00f0s\u00f6gn nemenda vi\u00f0 b\u00e6\u00f0i T\u00f6lvunarfr\u00e6\u00f0ideild og Matv\u00e6la- og n\u00e6ringarfr\u00e6\u00f0ideild. Foreldrar Andreu eru Sigur\u00f0ur Ingvar Hjaltason og Magnea Helga Magn\u00fasd\u00f3ttir. Andrea er \u00ed sambandi me\u00f0 Hlyni Dav\u00ed\u00f0 L\u00f6ve og \u00e1 tv\u00f6 b\u00f6rn, \u00ddmi Frosta (9 \u00e1ra) og Emblu S\u00f3l (5 \u00e1ra).<\/p>\n<\/div><\/div>","protected":false},"featured_media":5802,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2025-09-10T13:00:00+00:00","_phd_date_end":"2025-09-10T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Sj\u00e1lfvirkar fj\u00f6llitr\u00f3fs- og myndgreiningar til g\u00e6\u00f0aeftirlits \u00e1 sj\u00e1varfangi. 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