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Application of Image Texture Analysis for Evaluation of X-Ray Images of Fungal-Infected Maize Kernels

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Abstract

The feasibility of image texture analysis to evaluate X-ray images of fungal-infected maize kernels was investigated. X-ray images of maize kernels infected with Fusarium verticillioides and control kernels were acquired using high-resolution X-ray micro-computed tomography. After image acquisition and pre-processing, several algorithms were developed to extract image textural features from selected two-dimensional (2D) images of the kernels. Four first-order statistics (mean, standard deviation, kurtosis and skewness) and four grey level co-occurrence matrix (GLCM) features (correlation, energy, homogeneity and contrast) were extracted from the side, front and top views of each kernel and used as inputs for principal component analysis (PCA). The first-order statistical image features gave a better separation of the control from infected kernels on day 8 post-inoculation. Classification models were developed using partial least squares discriminant analysis (PLS-DA), and accuracies of 67 and 73% were achieved using first-order statistical features and GLCM extracted features, respectively. This work provides information on the possible application of image texture as method for analysing X-ray images.

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Acknowledgements

This work is based on the research supported in part by the National Research Foundation of South Africa for the grant, Unique Grant No. 94031. The authors acknowledge the Department of Plant Pathology at Stellenbosch University for providing the materials necessary for accomplishing this work. The authors also wish to thank Agri-Hope Project and Schlumberger Foundation for their financial assistance.

Funding

This study was funded by the National Research Foundation of South Africa, Unique Grant No. 94031.

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Correspondence to Paul J. Williams.

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Irene Orina declares that she has no conflict of interest. Marena Manley declares that she has no conflict of interest. Sergey Kucheryavskiy declares that he has no conflict of interest. Paul J. Williams declares that he has no conflict of interest.

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Orina, I., Manley, M., Kucheryavskiy, S. et al. Application of Image Texture Analysis for Evaluation of X-Ray Images of Fungal-Infected Maize Kernels. Food Anal. Methods 11, 2799–2815 (2018). https://doi.org/10.1007/s12161-018-1251-9

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