Augmented Data Selector to Initiate Text-Based CAPTCHA Attack

<div>Principle of adding the occluding line. The CAPTCHA image size is 60 × 160. The abscissa represents the length, the ordinate represents the width, and the shading area represents the area where the left and right endpoints A and B of the occluding line are generated by the method.</div>

Security and Communication Networks

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Figure 5

Figure 5: Augmented Data Selector to Initiate Text-Based CAPTCHA Attack 