Intelligent Crack Detection and Quantification in the Concrete Bridge: A Deep Learning-Assisted Image Processing Approach

Figure 7

Method of removing handwritten marks and the visual results of cracks before and after the removal of handwritten marks: (a) mask after pixel inversion, (b) crack binary image, (c) crack binary image after removing handwritten marks, (d) visualization with handwritten marks not removed, and (e) visualization with removing handwritten marks.