Table 9 Classification table for Apple leaf Diseases

From: Apple leaf disease severity grading based on deep learning and the DRL-Watershed algorithm

Plaque Level

Description

The Range of k

Level 0

No lesions present

0 ≤ k ≤ 0.01%

Level 1

Lesion area constitutes less than 5% of the total leaf area

0.01%< k ≤ 5%

Level 3

Lesion area accounts for 5–10% of the total leaf area

5%< k ≤ 10%

Level 5

Lesion area represents 10–25% of the total leaf area

10%< k ≤ 25%

Level 7

Lesion area covers 25–50% of the total leaf area

25%< k ≤ 50%

Level 9

Lesion area exceeds 50% of the total leaf area

50%< k