Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
MONITORING OF FRESH-CUT SPINACH LEAVES THROUGH MULTISPECTRAL VISION AND SENSORY EVALUATION
Year:2011
Research Areas
  • Foodstuffs tecnology,
  • Agriculture,
  • Engineering
Information
Abstract
The aim of this work was to compare an image algorithm to detect changes in quality related with changes in leaf pigments content in leafy spinach during storage with a visual evaluation using a 1-4 scale, where 1 corresponds to fresh samples without any spoilage and 4 to samples with severe deterioration, in order to obtain a sensory evaluation index (ISE) for each sample. The experiment was carried out on packed ready-to-use spinach stored at 4.5°C or 10ºC. Seventy-five leaves of spinach were analyzed at zero time and after 7, 14 and 21 days of storage at 4.5º C. Twenty-four e samples were measured at zero time and after 3, 6 and 9 days of storage at 10º C. Multispectral images were acquired in the red (R, 680±20 nm), infrared (IR, 800±20 nm) and blue (B, 450±20 nm) regions. Virtual images were calculated on the basis of spectral indexes usually employed for estimation of leaf pigment content. By considering the sensitive bands to chlorophyll, new virtual images were proposed. A non-supervised classification was applied to the obtained virtual images and the results were evaluated according to colorimetric measurements (CIE L*a*b* coordinates) and visual evaluation. Virtual images computed from R and B ranges gave the better results detecting changes in quality along period storage at 4.5º C. These virtual images were able to classify samples into two reference classes, including respectively the major part of the samples analyzed on zero time and on the 7th day and samples analyzed on the 14th and the 21th days.
International
Si
Congress
2011 CIGR SECTION VI INTERNATIONAL SYMPOSIUM
960
Place
NANTES (FRANCIA)
Reviewers
Si
ISBN/ISSN
9788439723394
Start Date
18/04/2011
End Date
20/04/2011
From page
123
To page
123
2011 CIGR SECTION VI INTERNATIONAL SYMPOSIUM
Participants
  • Autor: Loredana Lunadei . (UPM)
  • Autor: Lourdes Lleo Garcia (UPM)
  • Autor: Belen Diezma Iglesias (UPM)
  • Autor: Margarita Ruiz Altisent (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: LPF-TAGRALIA: Técnicas Avanzadas en Agroalimentación
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)