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

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Operation</td><td class="align_center">Total number of feature extractions</td><td class="align_center">Crack feature recognition number</td><td class="align_center">Proportion of fracture characteristics (%)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Before the algorithm</td><td class="align_center">14480</td><td class="align_center">10253</td><td class="align_center">70.8</td></tr><tr><td class="align_left">After the algorithm</td><td class="align_center">10562</td><td class="align_center">9930</td><td class="align_center">94.1</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of information on the removal of isolated points of cracks.</div>

Mathematical Problems in Engineering

tab1

Table 1

Table 1: Tunnel Lining Crack Recognition Based on Improved Multiscale Retinex and Sobel Edge Detection 