Research On Image Product3D Shape Merging Technology Based On Spherical Harmonic Map

In recent years, the technology is developing rapidly and the market is become more competitive, the using function has not enough to meet the consumers’demands. The new challenge for designers and manufacturers is being able to understand what the customers like and what can help to establish more pleasant products. In this aspect, the product styling has possessed a very important position in arousing the consumer’s emotion. Aslo, The research of product styling and image has gained widely attention.In this research, the shape of image product is the stating point. The consumers’ kansei image which formed by product styling form is analysed, and a new method to enrich product form based on Spherical Harmonic Map is presented. The research contains the following three steps.Firstly, the product samples and kansei image were obtained based on Kansei Engineering, and the relationship between the product3D shape and the consumers’ kansei image was built by the Principal Component Analysis method. The image scale distribution of the sample was created, and two experimental sample shapes were determined.Secondly, two sample models which determined by the first step were modeled by3D engineering software. The3D models were divided by triangular meshes, and the surface data structures of grid models were extracted. Then the two meshed models were spherical parameterized by Spherical Harmonic Map and generated the spherical embedding models. The parameterization datas were extracted through embedding models.At last, by merging two embedded models, a corresponding relation between two3D models can be established. The merged shapes between two models were easily generated with the linear interpolation method. The computer graphic user interface was designed to display the merged product3D shapes, and the images included in merged product3D shapes were analysed to test the innovation of this research.Two different car body shapes were taken as a practice example. The result shows that the method is adapted to the product shape merging, which will have a better application prospect in innovation design of computer aided product styling.