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Fig. 4 | Plant Methods

Fig. 4

From: Hyperspectral imaging: a novel approach for plant root phenotyping

Fig. 4

Root length for the twenty best combinations of pre-treatment, band selection and segmentation algorithm in the topsoil (a) and subsoil (b). The manually tracked reference length is shown with ± 10% margins (transparent grey area); grey dotted areas show the range of results without significant difference (Tukey, p < 0.005). NG refers to band selection via non Gaussian measures, BAT to Bhattacharyya distance based selection for single wavelength (BATs) and wavelength differences (BATd); for pre-treatments cf. Table 1; FU (grey) fuzzy clustering, TH (orange) thresholding, SVM (brown) support vector machine classification, KM k-means clustering (turquoise)

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