Abstract
In this paper, an engineering drawing retrieval method based on spherical harmonics is proposed. Firstly, the sample points are uniformly generated by computing the interaction points between the rays and the engineering drawing. Secondly, the sampled points are transformed from the 2D space into the 3D space to get the spherical harmonics shape descriptors. Finally, the Euclidean distance is adopted to compute the distance between the two feature vectors, which can give the similarity coefficient for two compared engineering drawings. Experimental results show that the proposed method is good at retrieving engineering drawings and the retrieval performance can meet the requirement of the practical retrieval.
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