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Wide Spectra of Quality Control Part 14

Tham khảo tài liệu 'wide spectra of quality control part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 380 Wide Spectra of Quality Control quality and process control in the fish processing industries are typically based on traditional trichromatic Red Green Blue imaging. However the aquaculture and fish processing industries are definitely areas where the added information in a spectral image can be exploited to improve the general quality and or reduce the production cost e.g. assessment of fat and water content distribution in fillets ElMasry Wold 2008 determination of freshness Chau et al. 2009 detection of nematodes in cod fillets Wold et al. 2001 Heia et al. 2007 and detection of melanin spots in Atlantic Salmon fillets Mathiassen et al. 2007 . The consumers associate increased intensity of red in salmonid fishes with superior quality the fish being fresher and having a better flavour Gormley 1992 Anderson 2000 . This means that colour is a highly important quality parameter in relation to the commercial production of salmonid fishes. To ensure that farmed salmon and trout achieve coloration that comply with the consumer preferences it is common practice within aquaculture to add astaxanthin to the fish feed. As previously mentioned astaxanthin is highly expensive and control and optimization of the astaxanthin concentration from feed to fish is of paramount importance for a cost effective salmonid fish production. The traditional methods for determination of astaxanthin in fish meat are based on a chemical extraction of astaxanthin from a sample of minced fish meat and subsequently determination by spectrophotometric analysis or high-performance liquid chromatography HPLC analysis. However the methods are time consuming labour demanding and sample destructive. Dissing et al. 2011 investigated the potential of using multispectral imaging for prediction of astaxanthin concentration in rainbow trout Oncorhynchus mykiss. Fillets from 59 fish where imaged by a VideometerLab Videometer A S Horsholm Denmark prior to determination of the true concentration of .