Table 4 The accuracy declines (%) of different approaches as the number of images in each category changes from 5 to 200.

From: A Parallel Adaboost-Backpropagation Neural Network for Massive Image Dataset Classification

Classification approaches

500 images

1,000 images

2,000 images

5,000 images

10,000 images

20,000 images

RF

9.1

11.4

15.0

17.0

19.7

21.9

SVM

9.2

10.8

14.4

16.8

18.4

20.1

Adaboost-BP

9.1

9.9

13.1

15.1

17.7

20.7

The method of Shi et al.

6.0

5.8

5.9

8.8

16.8

20.0

Parallel BP

1.5

2.5

5.5

8.5

12.2

16.4

Parallel Adaboost-BP

0.5

1.5

1.8

6.4

7.3

11.0