集成成像需要从不同角度记录三维(3D)物体的空间信息,采用计算机生成时,计算量大、时间长。针对这一问题,提出窗截取的立体元图像阵列快速生成方法。模拟真实透镜阵列的结构,建立采样模型,根据显示平台光学参数计算得出虚拟3D物体对应每个虚拟透镜元中的图像,即立体元图像,然后采用窗截取的方式生成立体元图像阵列。改变采样点和窗函数可以生成任意孔径任意排列结构的立体元图像阵列。实验搭建基于LED的集成成像显示平台,设计了与LED匹配的方形、六边形、圆形孔径的透镜阵列,选取不同类型的3D模型对比立体元图像阵列的计算时间和立体显示效果,结果表明,在不改变立体图像质量的前提下,当立体元图像的分辨率高于透镜阵列的采样率时,本文方法速度更快。

Integral imaging needs to record the spatial information of three-dimensional (3D) objects from different perspectives, therefore the computation is large and cost a long time by computer-generated method. To solve this problem, we present a fast elemental image array generation method by using window interception. The sampling model is established by simulating the structure of the lenslet array, and the elemental images of the virtual 3D object, corresponding to each virtual lens, are calculated based on optics parameters of the display platform. Then, the window interception is used to generate the elemental image array. The elemental image array with any aperture and any arranging structure can be generated by changing the sampling points and the window function. We build an integral imaging display platform based on LED and design the lenslet arrays with the shape of square, hexagonal and circular aperture. Different 3D models are used to compare the processing time and display effect. Experimental results show that without reducing the 3D image quality, the proposed method is faster when the resolution of elemental image is higher than the sampling rate of the lenslet array.