Augmented Data Selector to Initiate Text-Based CAPTCHA Attack

Table 1

Architecture of the training model.

Type/stride	Filter shape	Input size	Output size
Conv2D_1/S1	3 × 3 × 32	200 × 60 × 160 × 1	200 × 58 × 158 × 32
MaxPool2D_1/S2	2 × 2	200 × 58 × 158 × 32	200 × 29 × 79 × 32
Conv2D_2/S1	5 × 5 × 64	200 × 29 × 79 × 32	200 × 25 × 75 × 64
MaxPool2D_2/S2	2 × 2	200 × 25 × 75 × 64	200 × 12 × 37 × 64
Conv2D_3/S1	5 × 5 × 128	200 × 12 × 37 × 64	200 × 8 × 33 × 128
MaxPool2D_3/S2	2 × 2	200 × 8 × 33 × 128	200 × 4 × 16 × 128
Flatte	—	200 × 4 × 16 × 128	200 × 8192
Dense	—	200 × 8192	200 × 128
Reshape	—	200 × 128	200 × 4 × 32