News Column

Investigators from Sultan Qaboos University Have Reported New Data on Horticultural Science (RGB color imaging technique for grading of dates)

September 9, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Life Science Research are presented in a new report. According to news reporting originating in Muscat, Oman, by NewsRx journalists, research stated, "Hardness is one of the major factors in determining the quality of dried fruits. It increases the chewiness and toughness of the fruits."

The news reporters obtained a quote from the research from Sultan Qaboos University, "A robust quality assurance system is required for on-line grading of dried fruits as the present manual methods are inconsistent, inaccurate and laborious. The objective of this study was to determine the efficiency of a RGB color imaging technique to classify dates into three classes based on hardness: hard, semi-hard and soft dates. Dates from three common varieties in Oman (Fard, Khalas and Naghal) were used in this study (total 3300 samples). The RGB image of individual date sample was taken by a CCD camera and analyzed using Matlab software. Thirty nine features (13 features in each R, G and B channel) were extracted from each image and analyzed. Three classes (hard, semi-hard and soft) and two classes (hard and soft ('semi-hard and soft' together as 'soft')) classification models were developed using linear discriminant analysis (LDA) with all features and stepwise discriminant analysis (SDA) with selected features (based on level of contribution to classification). In three classes approach, the overall classification accuracy was 69%, 87% and 82% for Fard, Khalas and Naghal varieties, respectively, using LDA. It was 68%, 86% and 81% for Fard, Khalas and Naghal varieties, respectively, using SDA. The classification accuracy was improved in two classes approach. It was 84% (LDA) and 83% (SDA) for Fard, 90% (LDA) and 91% (SDA) for Khalas, and 96% (both in LDA and SDA) for Naghal varieties. Imaging techniques have great potential to develop on-line quality monitoring systems for dates based on hardness."

According to the news reporters, the research concluded: "However, further studies are required using other image acquisition systems such as NIR cameras to improve the classification."

For more information on this research see: RGB color imaging technique for grading of dates. Scientia Horticulturae, 2014;175():87-94. Scientia Horticulturae can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Scientia Horticulturae - www.elsevier.com/wps/product/cws_home/503316)

Our news correspondents report that additional information may be obtained by contacting A. Manickavasagan, Sultan Qaboos University, Coll Agr & Marine Sci, Dept. of Food Sci & Nutr, Muscat 123, Oman. Additional authors for this research include N.K. Al-Mezeini and H.N. Al-Shekaili (see also Life Science Research).

Keywords for this news article include: Muscat, Oman, Asia, Life Science Research

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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