Research And Application Of 3D Model Texture Mapping For Medical Image

Texture mapping for 3D models is an important subject in the field of graphics.Texture mapping for 3D models of medical images is also widely used,such as auxiliary diagnosis,teaching and training,surgical planning and so on.How to show medical images more truly has become a frontier interdisciplinary research direction.Although there are a large number of medical image display and processing system on the market at present,most of them can only display two-dimensional images and cannot display three-dimensional model of organs,which leads to a doctor only through reading a large number of medical image slices to determine organ morphology or lesion location.In order to display more intuitively,it is necessary to achieve 3D visualization of medical image,but often due to the large thickness of medical scan layer,the reconstruction effect is not good,and the use of color only to represent the appearance of organ model,the display of surface model obtained by 3D reconstruction is not realistic enough.Therefore,the application of texture to improve the realism and detail of the model organ can bring better use experience to doctors.At present,no medical image processing software can achieve automatic texture mapping.Aiming at the above problems,this thesis starts from the research of parameterization,a key technology of texture mapping,A conformal parameterization algorithm with minimum area distortion is proposed.By increasing the smoothness of conformal factor,the area distortion is reduced,and the area distortion between adjacent triangles is minimized while the convolution property is ensured,and the high-quality mapping between 3D model and texture image is realized.The experimental results show that compared with several common plane parameterization methods,the proposed parameterization method achieves better results.On the basis of the above algorithms,a new texture mapping method based on planar parameterization is proposed.The main idea is to fragment the input 3D mesh model,divide the 3D model into independent parts of the disc homeomorphism,and then use the parameterization technology proposed in this thesis to calculate the parameters and obtain each part with texture coordinates,eventually merging,and finally the whole model is textured according to the texture image.In this thesis,the automatic texture mapping process is implemented to overcome the defects of manual mapping.Finally,in order to fill the existing medical image display and processing system on the market cannot realize texture map function of blank,the texture mapping method proposed in this thesis is integrated into the practical application,and a medical image processing and texture mapping system is designed and implemented,realize the medical image three-dimensional visualization and 3D model of automatic texture map function,the medical image is more intuitive and real display.In short,this thesis from the study of plan parameterization technology to the proposed texture mapping process based on plane parameterization,and then to the design and implementation of medical image processing and mapping system.The theoretical research and practical application of 3d model texture mapping for medical image are presented step by step.