| The free stereoscopic display system based on microlens array has a wide application prospect because of its continuous motion parallax in both horizontal and vertical directions.With the development of its research,the display system with different lens array arrangement has been widely applied in the field of integral imaging display.However,the current rendering method is not suitable for all lens array arrangement,and the generation efficiency is low.In this thesis,computer generated integrated imaging method is used to render the content of light field display.By finding the corresponding relationship between the lens position and the elemental image,the high realistic 3D image of light field display is obtained based on the BRT technique,at the same time,the redering efficiency is improved.The main contents of this thesis and innovations obtained are as follows.1.In this thesis,the method of generating display content of optical field display for regular lens array is studied.The corresponding relationship between viewpoint and pixel is determined,and different pixel allocation rules are determined for different lens array arrangement,and the specific implementation process of ray tracing is described in detail.The experimental results show the applicability and efficiency of the traditional generation method under regular lens array arrangement.2.The method of light field content generation proposed in this thesis uses ray tracing technology to calculate the starting point and direction of light,and the color and brightness of the pixel covered by the element image are accurately controlled to make the rendered display more realistic.Finally,the structure similarity index of the optical field image is improved by 0.4 at most,and reaches 0.85 or above at most.At the same time,based on ray tracing algorithm,the rendering time is controlled in a stable range,and the display content of light field is generated in real time.Finally,the frame rate of EIA generation is over 40 fps,which can realize real-time generation.3.The camera is used to complete the collection of the actual lens position,and the index value of the pixel is recorded.Then,the range of the elemental image is redivided by the principle of veno diagram.Finally,the correct correspondence between the pixel and the light,the lens position and the unit image is obtained to realize the recurrence from special to general.In summary,the generation of the light field display content based on the arrangement of any mirror array is completed,and the compatibility problem of various display devices question is resolved.The research results of this paper complement the method of using computer to generate the content of light field display.The method can generate the content of high realistic light field display in real time,and at the same time,it is suitable for the light field display equipment of multiple lens array arrangement. |
