Recognition of Tunnel Lining Cracks Based on Digital Image Processing

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Algorithm</td><td class="align_center">Average time (s)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Gradient-improved Canny algorithm</td><td class="align_center">1.2</td></tr><tr><td class="align_left">SVM-based recognition algorithm</td><td class="align_center">8.7</td></tr><tr><td class="align_left">Maximum entropy segmentation algorithm</td><td class="align_center">1.1</td></tr><tr><td class="align_left">Ours</td><td class="align_center">5.2</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Mathematical Problems in Engineering

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Table 5

Table 5: Recognition of Tunnel Lining Cracks Based on Digital Image Processing 