Analysis of the noise in back-projection light field acquisition and its optimization
This addresses limitations in light field acquisition for imaging applications, but appears incremental as it builds on existing focal plane sweeping techniques.
The paper tackled the problem of severe defocus noise and low depth resolution in light field reconstruction using focal plane sweeping, proposing a method that reduces noise and improves resolution, with verification from numerical and experimental results.
Light field reconstruction from images captured by focal plane sweeping can achieve high lateral resolution comparable to the modern camera sensor. This is impossible for the conventional micro-lenslet based light field capture systems. However, the severe defocus noise and the low depth resolution limit its applications. In this paper, we analyze the defocus noise and the depth resolution in the focal plane sweeping based light field reconstruction technique, and propose a method to reduce the defocus noise and improve the depth resolution. Both numerical and experimental results verify the proposed method.