Light field reconstruction and measurement based on focal stack

In this paper, we present a consistency analysis for focal stack-based light field reconstruction. A pre-calibrated light field camera is used to construct the metric mapping relationship in image-object space and the reference light field, based on which light fields are reconstructed and quantitatively analyzed. Sequentially, a consistent light field reconstruction method is proposed. Image-object space transformation is established through camera calibration and image distortion is corrected simultaneously in the focal scanning space. The image stack can then be uniformly converted from image space to object space for consistent light field reconstruction, which can finally realize depth measurement in the focal scanning space.