Method for determining two ends of channel surface etching groove

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Such as figure 1 As shown, a method for determining the two ends of the groove on the road surface includes:

[0018] Step S1: Use 3D laser imaging technology to obtain a 3D track surface groove texture image;

[0019] Step S2: Extract the original longitudinal section of the road surface notch ;

[0020] Step S3: Calculate the gradient value using the first derivative of the original longitudinal profile data;

[0021] Step S4: generating auxiliary longitudinal section lines based on the original longitudinal section data;

[0022] Step S5: Taking the deepest point in the groove as the starting point, traverse forward until the gradient value is not greater than 0 and the height value is greater than the height value of the corresponding auxiliary longitudinal section line, which is determined as the right end of the groove; traverse backward until the gradient value is