Assessment of soft X-rays for detection of fungal infection in stored wheat

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" Assessment of soft X-rays for detection of fungal infection in stored wheat "
Dipali Shridhar Narvankar

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	53301
Doc. No	:	TL23255
Call number	:	‭MR50596‬
Main Entry	:	Dipali Shridhar Narvankar
Title & Author	:	Assessment of soft X-rays for detection of fungal infection in stored wheat\ Dipali Shridhar Narvankar
College	:	University of Manitoba (Canada)
Date	:	2008
Degree	:	M.Sc.
student score	:	2008
Page No	:	92
Abstract	:	Fungal infection is responsible for 5 to 10% of global food losses which can be reduced by early detection of fungal infection. Conventional methods currently being used for fungal detection are time consuming and tedious. Therefore, a fast, reliable, user friendly and easily upgradeable fungal detection method is necessary. In this study, the potential of a soft X-ray method for detection of fungal infection in stored wheat was explored. X-ray images of healthy wheat kernels and wheat kernels infected with Aspergillus niger , Aspergillus glaucus, and Penicillium spp. were acquired at 184 μA current and 13.6 kV voltage. A total of 34 features extracted from X-ray images were used to discriminate healthy and fungal-infected kernels. Statistical classifiers (linear, quadratic, and Mahalanobis) were applied to develop two-class, and four-class models. The maximum classification accuracy of 98.9% was obtained by the two-class model. The Mahalanobis discriminant classifier correctly identified on average 94.4% infected kernels. Four-class linear and quadratic classifiers could identify Penicillium with accuracy greater than 85%. Conversely, A. niger, A. glaucus, and healthy kernels were poorly classified by all statistical classifiers.
Subject	:	Applied sciences; Biological sciences; Aspergillus glaucus; Aspergillus niger; Penicillium; Agronomy; Agricultural engineering; 0359:Agronomy; 0539:Agricultural engineering
Added Entry	:	University of Manitoba (Canada)