Application of spectral characteristics for water stress analysis of cucumbers
Authors: Miroslav Vasilev, Sivelina Delcheva, Genoveva Milusheva
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When water stress occurs in cucumbers, it creates conditions for changes related to the color surface texture of their leaves. The purpose of this work is to search for relationships between data obtained from spectral characteristics and those from determining physiological indices of cucumbers. It is established that the separation of the different stages of the development of water stress in cucumbers does not depend on the choice of a method for reducing the amount of data of spectral characteristics, but on the used separation functions of discriminant analysis. When using linear separator functions, the total classification error reaches values above 10%, which makes the use of these functions inappropriate. The ability to predict physiological parameters of cucumbers by using reduced spectral data was evaluated. The results obtained are generally unsatisfactory. Further research is needed to make the methods and tools proposed in this paper suitable for use in practice.