# Partial light field tomographic reconstruction from a fixed-camera focal stack

arXiv: https://arxiv.org/abs/1503.01903 · HTML: https://mlsanity.com/paper/1503.01903/

## Key facts

- Cited by 3 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 6 Mar 2015.

## Built on by (most cited first, 3 of 3)

- [Phase Guided Light Field for Spatial-Depth High Resolution 3D Imaging](https://mlsanity.com/paper/2311.10568/) (2023)
- [Single-Shot Metric Depth from Focused Plenoptic Cameras](https://mlsanity.com/paper/2412.02386/) (2024)
- [STAR: Structure-aware Test-time Adaptation for diffusion-based light field Reconstruction](https://mlsanity.com/paper/2609.19747/) (2026)

## Abstract (arXiv)

This paper describes a novel approach to partially reconstruct high-resolution 4D light fields from a stack of differently focused photographs taken with a fixed camera. First, a focus map is calculated from this stack using a simple approach combining gradient detection and region expansion with graph-cut. Then, this focus map is converted into a depth map thanks to the calibration of the camera. We proceed after this with the tomographic reconstruction of the epipolar images by back-projecting the focused regions of the scene only. We call it masked back-projection. The angles of back-projection are calculated from the depth map. Thanks to the high angular resolution we achieve by suitably exploiting the image content captured over a large interval of focus distances, we are able to render puzzling perspective shifts although the original photographs were taken from a single fixed camera at a fixed position.