Research On Computer-Generated Integral Imaging Stereo Display Technology

In recent decades,with the emergence of large-size and high-resolution flat display devices,people's viewing experience has been significantly improved.However,the flat display device can only output two-dimensional information,and cannot observe a real threedimensional scene information.Therefore,the research on three-dimensional display is particularly important.Integral imaging is a technology that allows the acquisition and display of 3D information from computer-generated or real-world scenes.In recent years,integral imaging has been a very important research topic,due to its capacity to display real stereo 3D color images with full parallax and continuous viewing angles through incoherent light,observers do not need to wear auxiliary vision equipment and will not cause visual fatigue.The research content of this thesis is computer-generated integral imaging.Different from the traditional acquisition process,the acquisition process of this thesis is performed in virtual software.The three-dimensional scene is collected by simulating the real camera array,and the acquired elemental image is synthesized into a elemental image array by a new encoding method,thereby improving display effect.The effect of acquisition on depth of field is further analyzed.The adopted method is beneficial to the design of integral imaging display system.The work content and innovations of this thesis are as follows:(1)The effect of different acquisition methods on the display effect was studied.In the image acquisition stage,C4 D software is used to simulate the three-dimensional scene and camera array,and the off-axis acquisition method is used to acquire the elemental image of the three-dimensional scene.The public shooting area of this acquisition method is large,and the utilization rate of the collected information is improved without the problem of trapezoidal distortion.A high-resolution encoding method is adopted,and the collected elemental images are synthesized into a elemental image array by high-resolution encoding.Compared with the traditional encoding method,the matching degree between the elemental image array and the lens array is improved,and the display effect is better.(2)An integral imaging display platform consisting of a 15.6-inch 4K display screen and a honeycomb array of 35×23 lenses with a diameter of 9mm,as well as aperture stop and holographic function screen.Compared with the lens array of the matrix arrangement structure,the lens array of the honeycomb arrangement structure increases the fill factor and the sampling rate.At the same time,the main parameters of the display platform are described.(3)In fact,the depth of field in an integral imaging system is affected not only by the display process,but also by various parameters during the acquisition process.Clear elemental images can be acquired only within a specific range,and fuzzy elemental images will be obtained outside the range.Through theoretical analysis of various parameters of the lens and the influence of the diameter of the circle of confusion on human observation,a calculation formula for the depth of field for integral imaging is derived.Combined with the experimental results,the correctness of the theory is further verified.