Tunnel Lining Crack Recognition Based on Improved Multiscale Retinex and Sobel Edge Detection

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Test object</td><td class="align_center">Quantity</td><td class="align_center">Recognition rate (%)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Concrete crack</td><td class="align_center">200</td><td class="align_center">99.0</td></tr><tr><td class="align_left">Tunnel lining crack</td><td class="align_center">200</td><td class="align_center">97.5</td></tr><tr><td class="align_left">Bridge crack</td><td class="align_center">200</td><td class="align_center">92.0</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of the accuracy of crack recognition.</div>

Mathematical Problems in Engineering

tab3

Table 3

Table 3: Tunnel Lining Crack Recognition Based on Improved Multiscale Retinex and Sobel Edge Detection 