基于相机阵列获取元素图像的集成成像抗串扰参数设计

Design parameters of elemental images formed by camera array for crosstalk reduction in integral imaging

为了得到理想的抗串扰三维图像,研究了用相机阵列记录三维场景时,如何排列所获取的元素图像并使其与重构的微透镜阵列匹配的问题。通过分析集成成像原理,讨论了元素图像间距、微透镜阵列间距、焦距等几个重要参数之间的关系,证明了对于固定的微透镜阵列,元素图像间距是场景重构时的重要因素,并结合分析给出了最佳设计参数。系统分析了元素图像阵列放置在焦面或焦面以外的物像关系,以及元素图像间距的作用,针对上述因素对成像串扰及景深的影响,论证了在焦面成像时串扰最小,景深最大的结论。所证明的结论对用相机获取大场景时排列所获元素图像,实现三维再现具有指导意义。

To obtain ideal 3D dimensional displays with crosstalk reduction,this paper researches how to arrange the elemental image and to match it with the reconstructed micro-lens array when a three dimensional scene is recorded by a camera array.The principle of integral imaging is analyzed and design parameters such as the pitch of elemental image,pitch and the focal length of the micro-lens array are studied.On the basis of the analysis,the optimum design parameters are given.Two conditions are discussed respectively when the elemental images are placed within and beyond the focal point of the micro-lenses.When the elemental images are placed at the focal plane,a virtual and real reconstructed image can be obtained simultaneously.The imaging quality is compared in above conditions.It is noted that the less crosstalk and larger depth of the focus can be seen while the elemental images are placed at the focal plane.The conclusion can provide a direction for arranging images and 3D reconstruction when the camera is used to capture a larger scene.