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

<table class="table-group" id="tab4"><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">Running time (s)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Document 6 algorithm</td><td class="align_center">5.2</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">Maximum entropy segmentation algorithm</td><td class="align_center">1.1</td></tr><tr><td class="align_left">SVM-based crack recognition algorithm</td><td class="align_center">8.7</td></tr><tr><td class="align_left">MSR-B algorithm</td><td class="align_center">4.1</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of algorithm running time.</div>

Mathematical Problems in Engineering

tab4

Table 4

Table 4: Tunnel Lining Crack Recognition Based on Improved Multiscale Retinex and Sobel Edge Detection 