Recognition of Tunnel Lining Cracks Based on Digital Image Processing

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Type of crack</td><td class="align_center">A</td><td class="align_center">B</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">Horizontal crack</td><td class="align_center">5∼13</td><td class="align_center">30∼45</td></tr><tr><td class="align_left">Vertical crack</td><td class="align_center">17∼30</td><td class="align_center">7∼11</td></tr><tr><td class="align_left">Oblique crack</td><td class="align_center">11∼30</td><td class="align_center">7∼40</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Number of different elements in the set.</div>

Mathematical Problems in Engineering

tab2

Table 2

Table 2: Recognition of Tunnel Lining Cracks Based on Digital Image Processing 