Efficient Crack Detection Method for Tunnel Lining Surface Cracks Based on Infrared Images

The detection of tunnel lining cracks is a very key procedure in the inspection of tunnels. Traditional image-processing approaches are commonly based on the characteristic that the grayscale value of the crack is a local minimum. However, issues such as low contrast, uneven illumination, and severe noise pollution generally exist in a tunnel lining image. Hence, the traditional image-processing method cannot effectively detect cracks on the...