Bandwidth-optimized regularization for low-frequency recovery in quantitative phase imaging
Abstract
We propose the expanded matrix solution of the transport of intensity equation (EMS-TIE), introducing a tunable parameter ( th ) to the Tikhonov regularization term. This design addresses the limitation of conventional Tikhonov solvers, where the filter’s bandwidth is strictly coupled to the cutoff frequency. By decoupling these parameters, the proposed design allows for tuning the filter shape to optimize signal recovery. Simulations and experiments demonstrate that increasing passband width significantly reduces retrieval error and enhances low-frequency phase recovery, outperforming standard Tikhonov-based methods.
Fields of Study & Subjects
Digital Holography and Microscopy
Adaptive optics and wavefront sensing
Advanced X-ray Imaging Techniques
Publication details
- Journal / source
- Journal of the Optical Society of America A
- Publisher
- Optica Publishing Group
- Volume
- 43
- Issue
- 4
- Pages
- A1–A1
- Publication date
- 10 February 2026
- Language
- EN