Automatic classification of spread‐F types in ionogram images using support vector machine and convolutional neural network

Earth, Planets and Space

Table 13 Performance of CNN model with dropout on the selected models

Dropout rate (%)	Model accuracy (%)
Dropout rate (%)	7-layer with fast-NLmeans filter	8-layer with bilateral filter	9-layer with median blur filter
10	91.2	92.2	90.3
20	90.6	91.1	91.1
30	92.9	87.1	88.5
40	91.2	60.7	78.7
50	34.5	34.5	60.1
60	34.5	34.5	34.5
70	34.5	34.5	34.5
80	34.5	34.5	34.5
90	34.5	34.5	34.5