title: Predicting Gilthead Sea Bream (Sparus aurata) Freshness by a Novel Combined Technique of 3D Imaging and SW-NIR Spectral Analysis.
abstract: A technique that combines the spatial resolution of a 3D structured-light (SL) imaging system with the spectral analysis of a hyperspectral short-wave near infrared system was developed for freshness predictions of gilthead sea bream on the first storage days (Days 0-6). This novel approach allows the hyperspectral analysis of very specific fish areas, which provides more information for freshness estimations. The SL system obtains a 3D reconstruction of fish, and an automatic method locates gilthead's pupils and irises. Once these regions are positioned, the hyperspectral camera acquires spectral information and a multivariate statistical study is done. The best region is the pupil with an R² of 0.92 and an RMSE of 0.651 for predictions. We conclude that the combination of 3D technology with the hyperspectral analysis offers plenty of potential and is a very promising technique to non destructively predict gilthead freshness.
authors: Departamento de Ingeniería de Sistemas y Automática, Universidad Politècnica de València, Valencia 46022, Spain. euivmar@upvnet.upv.es.
authors: Eugenio
authors: E
authors: Ivorra
authors: Departamento de Tecnología de Alimentos, Universidad Politècnica de València, Valencia 46022, Spain. saveram@upvnet.upv.es.
authors: Samuel
authors: S
authors: Verdu
authors: Departamento de Ingeniería de Sistemas y Automática, Universidad Politècnica de València, Valencia 46022, Spain. asanchez@isa.upv.es.
authors: Antonio J
authors: AJ
authors: Sánchez
authors: Departamento de Tecnología de Alimentos, Universidad Politècnica de València, Valencia 46022, Spain. rgraume@tal.upv.es.
authors: Raúl
authors: R
authors: Grau
authors: Departamento de Tecnología de Alimentos, Universidad Politècnica de València, Valencia 46022, Spain. jmbarat@tal.upv.es.
authors: José M
authors: JM
authors: Barat
mesh_terms: D000818:Animals; D015374:Biosensing Techniques / Q000379:methods*; D005519:Food Preservation / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015999:Multivariate Analysis; D021541:Sea Bream; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
keywords: 3D segmentation; 3D structured light; SW-NIR; fish freshness; hyperspectral imaging