Mutual augmentation of spectral sensing and machine learning for non-invasive detection of apple fruit damages

Shurygin, B.; Smirnov, I.; Chilikin, A.; Khort, D.; Kutyrev, A.; Zhukovskaya, S.; Solovchenko, A.

Авторы: Shurygin Boris, Smirnov Igor, Chilikin Andrey, Khort Dmitry, Kutyrev Alexey, Zhukovskaya Svetlana, Solovchenko Alexei
Журнал: Horticulturae
Том: 8
Номер: 12
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Номер статьи: 1111
DOI: 10.3390/horticulturae8121111
Аннотация: Non-invasive techniques for the detection of apple fruit damages are central to the correct operation of sorting lines ensuring storability of the collected fruit batches. The choice of optimal method of fruit imaging and efficient image processing method is still a subject of debate. Here, we have dissected the information content of hyperspectral images focusing on either spectral component, spatial component, or both. We have employed random forest (RF) classifiers using different parameters as inputs: reflectance spectra, vegetation indices (VIs), and spatial texture descriptors (local binary patterns, or LBP), comparing their performance in the task of damage detection in apple fruit. The amount of information in raw hypercubes was found to be over an order of magnitude excessive for the end-to-end problem of classification. Converting spectra to vegetation indices has resulted in a 60-fold compression with no significant loss of information relevant for phenotyping and more robust performance with respect to varying illumination conditions. We concluded that the advanced machine learning approaches could be more efficient if complemented by spectral information about the objects in question. We discuss the potential advantages and pitfalls of the different approaches to the machine learning-based processing of hyperspectral data for fruit grading.
Добавил в систему: Соловченко Алексей Евгеньевич

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