Study Of Naked Eye 3D And Evaluation Of Visually Induced Motion Sickness

In recent years,stereoscopic display technology has developed rapidly and various 3D products have emerged in endlessly.Mainstream display products are divided into two categories: head-mounted display device and naked eye 3D display device.Among them,head-mounted display device mainly has glasses 3D and VR devices on the market.The advantage of such devices is that it can provide better stereoscopic vision and immersive sense.The main products of naked eye 3D display device are naked eye 3D display and holographic projection display devices,which has the advantage of viewing comfort and convenience.Historically,product simplification has been an inevitable trend of development,and naked eye 3D display equipment conforms to this trend.In addition,the other obstacle in stereoscopic display technology is visual induced motion sickness,which can result in dizziness,sweating,nausea and vomiting.This phenomenon is serious damage to the health of consumers,also to some extent hindered the development of stereo display technology.Therefore,it is of great significance to study the naked eye 3D display technology and visually induced motion sickness.According to the research on naked eye 3D display technology,the purpose of this dissertation is to provide a simpler and resource-saving hardware implementation scheme for multiview rendering and view fusion technology based on floating-point cylindrical lens gratings display in real-time ultra-high definition naked eye 3D display technology.Through the study of visual induced motion sickness,a new method to deal with the balance data of human body was proposed,and the indicators of VIMS could be found from the perspective of balance.In naked eye 3D display,the dissertation first introduces the principle of human eyes stereo perception and the basic principles of mainstram stereoscopic display.Then,according to the basic principle of the naked eye 3D display device,an asymmetric shift-sensor camera setup model is proposed,and a simplified fusion method is proposed for the floating-point cylindrical lens grating.Finally,on this basis,a real-time ultra-high definition naked eye 3D display system was proposed and verified by simulation.In VIMS research,the dissertation used a VR based vehicle driving simulator to induce the subjects to produce VIMS symptoms,and collected the data of the Wii Balance Board and the accelemeter for subjects during the experimental.Finally,and effective indicators are presented to distinguish the motion and non-motion state.The main research results of this dissertation are summarized as follows.(1)An asymmetric shift-sensor camera setup model is proposed for virtual view generation in multi-view rendering.The camera setup model arranges the generated virtual views on one side of the original view.In this way,all virtual views can be generated using the same depth-image-based rendering(DIBR)algorithm,which effectively reduces the multi-view rendering module hardware implementation complexity.(2)For floating-point lenticular lens gratings,an improved multi-view fusion method is proposed the floating-point.The method simplifies the formula for generating the lenticular coefficient array,and reduces the hardware implementation complexity of multi-view fusion.Based on this,the hardware implementation circuit is given.(3)A real-time ultra-high definition naked eye 3D display system was proposed and verified by simulation.The results show that compared with other hardware designs,the system in this article requires less storage resources.When setting the appropriate parameters,the system can provide a fairly good stereoscopic image quality.(4)A total of 36 candidate evaluation metrics were selected for WBB data from the time and frequency domains.Statistical analysis results showed that the indicators of significant differences in the balance between open and closed eyes were: mean distance,rms distance,mean velocity,95% confidence circle area,95% confidence ellipse area,sway area,power spectral density.In the open eye state,there is a significant difference in the AP direction power spectrum density and AP direction in the centroidal frequency.In the close eye state,there is a significant difference in the frequency dispersion of the ML direction.(5)For the ACC data,there is a significant difference in the standard deviation of the AP direction angle and the peak of the AP direction angle between the non-VIMS state and the VIMS state in the open or close eye state,which can be used as an index for evaluating the VIMS.The research results of this dissertation can provide a more complete solution for the implemention of real-time ultra-high definition naked eye 3D display system,providing a basis for the future detection of motion-induced motion sickness,thus promoting the application of three-dimensional display technology.