Statistical Quality Assessment of Pre-fried Carrots Using Multispectral Imaging |
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| Abstract | Multispectral imaging is increasingly being used for quality assessment of food items due to its non-invasive benefits. In this paper, we investigate the use of multispectral images of pre-fried carrots, to detect changes over a period of 14 days. The idea is to distinguish changes in quality from spectral images of visible and NIR bands. High dimensional feature vectors were formed from all possible ratios of spectral bands in 9 different percentiles per piece of carrot. We propose to use a multiple hypothesis testing technique based on the Benjamini-Hachberg (BH) method to distinguish possible significant changes in features during the inspection days. Discrimination by the SVM classifier supported these results. Additionally, 2-sided t-tests on the predictions of the elastic-net regressions were carried out to compare our results with previous studies on fried carrots. The experimental results showed that the most significant changes occured in day 2 and day 14. |
| Keywords | Multispectral imaging, Multiple hypothesis testing, Segmentation, Food quality assessment, SVM classification, Elastic-net regression |
| Type | Conference paper [With referee] |
| Conference | 18th Scandinavian Conference on Image Analysis (SCIA 2013) |
| Year | 2013 Vol. 7944 pp. 620-629 |
| Publisher | Springer Verlag |
| Series | Lecture Notes in Computer Science |
| ISBN / ISSN | ISBN 978-3-642-38885-9 |
| Electronic version(s) | [pdf] |
| Publication link | http://hatutus.org/scia2013/ |
| BibTeX data | [bibtex] |
| IMM Group(s) | Image Analysis & Computer Graphics |