A Survey on Breaking Technique of Text-Based CAPTCHA

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/scn/volume-2017/6898617/figures/6898617.fig.007a.svgz" name="6898617.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Original image</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/scn/volume-2017/6898617/figures/6898617.fig.007b.svgz" name="6898617.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Nonshared character components</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/scn/volume-2017/6898617/figures/6898617.fig.007c.svgz" name="6898617.fig.007c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Shared character components</td></tr></table>

<div>An example of segmented CAPTCHA image in [<a href="/journals/scn/2017/6898617/#B33">36</a>].</div>

Security and Communication Networks

A Survey on Breaking Technique of Text-Based CAPTCHA

Figure 7