Sole edge curve extraction method

The invention provides a sole edge curve extraction method, which comprises the following steps of: S1, acquiring a first section of sole point cloud and a second section of sole point cloud, and splicing the two sections of sole point cloud to obtain a spliced point cloud spliced for the first time; s2, controlling the shoe sole to rotate by a preset angle, obtaining the point cloud of the i-th section of the shoe sole, and obtaining the splicing point cloud of the (i-1) th splicing; step S3, if the (n-1) th splicing is carried out, entering step S4, otherwise, entering step S2; step S4, if the integrity of the spliced point cloud obtained by the (n-1) th splicing meets the requirement, entering step S6, otherwise, entering step S5; step S5, positioning a point cloud missing position of the spliced point cloud and carrying out supplementary shooting to obtain a supplementary shooting point cloud, and carrying out point compensation on the point cloud missing position; and S6, obtaining a sole edge curve acco