Zhang Miao, Wei Chuanzhen, Piao Yongri, Liu Jianqiao
Appl Opt. 2017 Aug 1;56(22):6059-6064. doi: 10.1364/AO.56.006059.
In integral imaging, one of the main challenges is the limited depth of field (DOF), which is mainly caused by the short focal length of the microlenses. In this paper, we propose a method to extend the DOF of a synthetic aperture integral imaging (SAII) system by realizing the image fusion method on the multi-focus elemental images with different perspectives. In the proposed system, the contour-based object extraction method combined with size correction is developed to solve size inconsistency of the objects in the misaligned elemental images. The all-in-focus elemental images (EIs) combining selected features of multi-focus elemental images are then obtained by the block-based image fusion method. In the last step, the reconstructed images with the extended DOF can be generated based on the all-in-focus EIs in the SAII system. Experimental results are presented to demonstrate the feasibility of the proposed system.
在积分成像中，主要挑战之一是景深（DOF）有限，这主要是由微透镜的短焦距引起的。在本文中，我们提出了一种通过在具有不同视角的多焦点元素图像上实现图像融合方法来扩展合成孔径积分成像（SAII）系统景深的方法。在所提出的系统中，开发了结合尺寸校正的基于轮廓的目标提取方法，以解决未对准的元素图像中目标的尺寸不一致问题。然后通过基于块的图像融合方法获得结合了多焦点元素图像选定特征的全聚焦元素图像（EI）。在最后一步中，可以基于SAII系统中的全聚焦EI生成具有扩展景深的重建图像。给出了实验结果以证明所提出系统的可行性。
