Livestock point cloud bidirectional fault region segmentation method and device

The invention provides a livestock point cloud bidirectional fault region segmentation method and device, and the method comprises the steps: determining the main direction of livestock point cloud data, and carrying out the coordinate system construction of the point cloud data; performing vertical coordinate direction point cloud slice segmentation on the livestock point cloud data, and determining a leg circumference slice interested slice interval; for a plurality of slice point clouds in the interested slice interval of the leg circumference, extracting a clustering result of all points of each slice, and determining effective slices of the leg circumference according to the clustering result; carrying out coordinate system secondary reconstruction according to the position features of the leg circumference effective slices, carrying out transverse point cloud slice segmentation according to the point cloud data after secondary reconstruction, and determining a body size slice point cloud cluster. According to the method, the influence of livestock postures on body size calculation is overcome to a certain extent, the livestock is not required to keep a strictly straight posture, higher adaptability is achieved, interference of animal postures and individual differences is not likely to happen, and therefore the accuracy of a calculation result is higher.