Three-dimensional palmprint recognition method based on geometrical characteristics and direction characteristics

The invention discloses a three-dimensional palmprint recognition method based on geometrical characteristics and direction characteristics, and the method comprises the following steps: S1, preprocessing all three-dimensional palmprint point clouds, and building a three-dimensional palmprint point cloud of a palmprint curved surface; s2, extracting shape index type features, curved surface type features and self-adaptive correction competitive coding features from the three-dimensional palmprint point cloud; s3, performing feature processing on the three features to obtain corresponding feature vectors; s4, establishing three dictionaries through the three feature vectors; s5, repeating S1-S3, extracting three feature vectors of the test three-dimensional palmprint point cloud; s6, performing classification processing on the three feature vectors of the test three-dimensional palmprint point cloud and the corresponding dictionaries to obtain three errors between the test three-dimensional palmprint point clo