基于倾斜狭缝光栅的自由立体显示串扰比

自由立体显示采用倾斜放置的狭缝光栅来减轻莫尔条纹的影响，却因此造成各视点图像之间的串扰．首先基于子像素判决提出一种定量计算串扰比的方法，建模得到光栅倾斜角度与相邻视点图像之间串扰比的关系．然后提出立体图像有效分辨率的概念，将串扰比引入其中，能够客观地衡量经过立体显示后得到的立体图像分辨率．此外，假设装配误差为随机变量，经由模型仿真得到串扰比误差与装配误差之间的关系．研究表明：基于倾斜缝光栅的自由立体显示设备中，各个最优观看位置的串扰比随着光栅倾斜角度的增大而增大，但是当光栅倾斜角取某些特殊值时，串扰比为局部最小值．

Crosstalk Ratio Evaluation of Autostereoscopic Display Based on the Slanted Parallax Barrier

Parallax barrier in autostereoscopic display is slanted to reduce Moir6 fringes, which leads to the crosstalk between neighboring images viewed in the optimal viewing zone. In this paper, a calculation method of crosstalk ratio was proposed based on the sub-pixel judgment. The simulation results showed the relationship between the angle of parallax barrier and the crosstalk ratio. With the introduction of crosstalk ratio, the concept of autostereoscopic effective resolution was defined to objectively evaluate autostereoscopic image resolution. Given that assembly error was a random variable, the relationship between crosstalk ratio error and assembly error was obtained. The results showed that the crosstalk ratio at each optimal view position would increase with the increase of the angle of slanted parallax barrier. However, the crosstalk ratio would reach a local minimum when the angle of parallax barrier equals some special numerical values.