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Table 2 Features used for differentiation

From: Classification of images of wheat, ryegrass and brome grass species at early growth stages using principal component analysis

Feature

Definition

ri

R/(0.2989 * R + 0.5870 * G + 0.1140 * B)

gi

G/(0.2989 * R + 0.5870 * G + 0.1140 * B)

bi

B/(0.2989 * R + 0.5870 * G + 0.1140 * B)

RBI

(ri-bi)/(ri+bi)

ERI

(ri-gi)×(ri-bi)

EGI

(gi-ri)×(gi-bi)

EBI

(bi-gi)×(bi-ri)

W

2 × erosion steps

WDR

W/Waddle Disk Diameter

Uniformity (Ut)

∑ i = 0 L - 1 p 2 ( z i )

Entropy (Et)

- ∑ i = 0 L - 1 p ( z i ) l o g p ( z i )