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Research on Three-dimensional Surface Splicing Method Based on Genetic Algorithm and the Wavelet Transformation

Author: FengHaiMing
Tutor: YuQingCang
School: Zhejiang University of Technology
Course: Signal and Information Processing
Keywords: Three-dimensional Surface Splicing Genetic Algorithm Wavelet Transform
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 64
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Abstract


Three dimensional surface splicing is an important research direction in the field of digital image processing and the key technology of realize the topography measurement to large-scale objects. The three-dimensional surface splicing technique is a new surface technology which carries on spatial mutually matches alignments to the surfaces that has the overlap region and form a complete, high quality new surface which contains the information of wide view through the re-sampling. With the development of science and technology, the three-dimensional surface splicing technique is also taken seriously by people; it is widely used in the fields of computer vision, remote sensing image processing, medical image analysis, etc.Three dimensional detection method based on the symbol M array structure light was proposed by the group, realized the detection of dynamic scene and the three dimensional reconstruction under the projection of binary illuminant. This three-dimensional testing method suitable for measure large size and small surface curvature objects, these survey objects’ surface does not have the obvious characteristic, therefore is not suitable to use the method of free splicing.Based on the three-dimension detection method, a kind of three dimensional surface splicing methods based on the genetic algorithm and the wavelet transformation was proposed. The main research content is as follows:(1) Study on the coordinate acquisition algorithm of three dimensional reconstructions. The principle of image three dimensional reconstructions was detail studied and elaborated, the three dimensional coordinate acquisition algorithms was detail introduced. On this basis, the three dimensional coordinate obtain algorithm used by the group before was improved. The experimental results show that the improved algorithm has better smooth, robustness and accuracy. (2) Study on the genetic algorithm used in three dimensional surface registrations. The aspect of three dimensional surface matching based on genetic algorithm was studied in the paper, the feasibility of using genetic algorithm to realize the three dimensional surface registration is in-depth analyzed, a kind of curved surface overlapping area registration methods based on genetic algorithm was proposed. Take mutual information as the similarity measure, spatial transformation parameters of the registration surface were optimized. During the optimization process, spatial transformation parameters were converged to the optimal value by using the genetic algorithm. The efficiency of the method was verified by the experimental results.(3) Study on the three dimensional surface fusion algorithm. A new three dimensional surface fusion algorithm was deduced. The three-dimensional wavelet transform was deduced by two-dimensional wavelet transform in order to better implement the fusion of three dimensional surfaces after registration, and then wavelet transform was applied in the process of three dimensional surface fusions. Measure of the wavelet decompose and the inverse wavelet transform was taken on the fusion surface respectively, the final integration surface through reconstruction was got, better realizing fusion after the coarse registration of three-dimensional surface. The feasibility of the method was verified by the experimental results.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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