Classification of Astaxanthin Colouration of Salmonid Fish using Spectral Imaging and Tricolour Measurement

Martin Georg Ljungqvist, Bjørn Skovlund Dissing, Michael Engelbrecht Nielsen, Bjarne Kjær Ersbøll, Line Katrine Harder Clemmensen, Stina Frosch

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Abstract

The goal of this study was to investigate if it is possible to differentiate between rainbow trout (Oncorhynchus mykiss) having been fed with natural or synthetic astaxanthin. Three different techniques were used for visual inspection of the surface colour of the fish meat: multi-spectral image capturing, tricolour CIELAB measurement, and manual SalmoFan inspection. Furthermore it was tested whether the best predictions come from measurements of the steak or the fillet of the fish. Methods used for classication were linear discriminant analysis (LDA), quadratic discriminant analysis (QDA), and sparse linear discriminant analysis (SLDA).
Original languageEnglish
Place of PublicationKgs. Lyngby
PublisherTechnical University of Denmark
Number of pages27
Publication statusPublished - 2012
SeriesD T U Compute. Technical Report
Number2012-08
ISSN1601-2321

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