Point cloud data processing method and system based on multichannel feature extraction, and computer equipment

The invention provides a multi-channel feature extraction-based point cloud data processing method and system and computer equipment, and the method comprises the steps: collecting 3D point cloud data, setting M KNN sampling channels, carrying out the feature extraction of one group of KNN sampling channel point cloud sub-data through each KNN sampling channel, obtaining M sampling results, carrying out the feature fusion of the M sampling results, achieving the multi-channel KNN sampling, and carrying out the feature fusion of the M sampling results, expanding the point cloud sampling range, increasing multi-scale information, accelerating the processing speed, and splicing to obtain a point cloud fusion feature J; performing up-sampling processing on the point cloud fusion feature J to obtain a first point cloud feature vector H of which the length is E; feature enhancement is carried out on the first point cloud feature vector H, by multiplying the first point cloud feature vector H with a learnable parame