Noninvasive forward-scattering system for rapid detection, characterization, and identification of <i>Listeria</i> colonies: image processing and data analysis

Bartek Rajwa; Bulent Bayraktar; Padmapriya P. Banada; Karleigh Huff; Euiwon Bae; E. Daniel Hirleman; Arun K. Bhunia; J. Paul Robinson

doi:10.1117/12.686298

23 October 2006 Noninvasive forward-scattering system for rapid detection, characterization, and identification of Listeria colonies: image processing and data analysis

Bartek Rajwa, Bulent Bayraktar, Padmapriya P. Banada, Karleigh Huff, Euiwon Bae, E. Daniel Hirleman, Arun K. Bhunia, J. Paul Robinson

Author Affiliations +

Proceedings Volume 6381, Optics for Natural Resources, Agriculture, and Foods; 638105 (2006) https://doi.org/10.1117/12.686298
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

Abstract

Bacterial contamination by Listeria monocytogenes puts the public at risk and is also costly for the food-processing industry. Traditional methods for pathogen identification require complicated sample preparation for reliable results. Previously, we have reported development of a noninvasive optical forward-scattering system for rapid identification of Listeria colonies grown on solid surfaces. The presented system included application of computer-vision and patternrecognition techniques to classify scatter pattern formed by bacterial colonies irradiated with laser light. This report shows an extension of the proposed method. A new scatterometer equipped with a high-resolution CCD chip and application of two additional sets of image features for classification allow for higher accuracy and lower error rates. Features based on Zernike moments are supplemented by Tchebichef moments, and Haralick texture descriptors in the new version of the algorithm. Fisher's criterion has been used for feature selection to decrease the training time of machine learning systems. An algorithm based on support vector machines was used for classification of patterns. Low error rates determined by cross-validation, reproducibility of the measurements, and robustness of the system prove that the proposed technology can be implemented in automated devices for detection and classification of pathogenic bacteria.

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Bartek Rajwa, Bulent Bayraktar, Padmapriya P. Banada, Karleigh Huff, Euiwon Bae, E. Daniel Hirleman, Arun K. Bhunia, and J. Paul Robinson "Noninvasive forward-scattering system for rapid detection, characterization, and identification of Listeria colonies: image processing and data analysis", Proc. SPIE 6381, Optics for Natural Resources, Agriculture, and Foods, 638105 (23 October 2006); https://doi.org/10.1117/12.686298

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