Trajectory generation method based on lattice image

The invention relates to a trajectory generation method based on a lattice image. The method comprises steps that image data corresponding to multiple passed-by position points of an identification device are collected by the identification device; the image data of the multiple position points are processed to obtain corresponding multiple position coordinates; each position point is sequentiallytaken as the current position point, and first distance difference between each current position point and a previous position point is calculated; whether the first distance difference between the current position point and the previous position point is greater than the preset distance threshold is determined; if not, the attribute information of the current position point is set as the first attribute; if yes, second distance difference between the current position point and a latter position point is calculated; whether the second distance difference between the current position point andthe latter position point