Three-dimensional model retrieval system and method based on parts division of hand-drawn draft

The present invention discloses a three-dimensional model retrieval system and method based on parts division of a hand-drawn draft. The system comprises: a preprocessing module, a part marking module, a sampling point feature extracting module, a parts division module, and a similarity calculation and total score sequencing module, wherein the preprocessing module is used for denoising a hand-drawn query draft to obtain a grayscale image, and performing binarization processing, boundary extension processing and image hole filling processing on the grayscale image to obtain a processed image; the part marking module is used for performing equal-interval sampling on the processed image, and adding part tags at sampling points; the sampling point feature extracting module is used for extracting various feature vectors of the sampling points; the parts division module is used for performing division model training according to the various feature vectors of the sample points to which the part tags have been added; and the similarity calculation and total score sequencing module is used for performing local similarity calculation on parts, performing sequencing according to total scores, and feeding back a sequencing result to a client. Implementation of the embodiments of the present invention can make three-dimensional model retrieval based on the hand-drawn draft more accurate and effective.