high cost and low efficiency of bridge crack detection in China
a method of graph searching for bridge crack edges detecting method is proposed. The number of crack pixels is counted and the crack width is calculated to achieve the purpose of bridge crack detection. Comparing with other crack detection methods
the experimental results show that the absolute error of graph search algorithm for cracks detection is kept within 0. 03 mm
the algorithm operation time is 160 ms
and the misclassification rate is2. 67 %. It shows that the method of graph searching for bridge cracks detecting can meet the requirements of engineering inspection and can be applied to practice.