Deep DIH : Statistically Inferred Reconstruction of Digital In-Line Holography by Deep Learning
This work addresses a data scarcity issue in digital holography for microscopic imaging, offering a more practical deep learning solution, though it appears incremental as it builds on existing autoencoder architectures.
The paper tackles the problem of reconstructing 3D images from 2D holograms in digital in-line holography, specifically addressing twin image removal, and proposes a novel autoencoder-based deep learning method that eliminates the need for massive training datasets, achieving superior performance compared to state-of-the-art single-shot compressive methods in simulations.
Digital in-line holography is commonly used to reconstruct 3D images from 2D holograms for microscopic objects. One of the technical challenges that arise in the signal processing stage is removing the twin image that is caused by the phase-conjugate wavefront from the recorded holograms. Twin image removal is typically formulated as a non-linear inverse problem due to the irreversible scattering process when generating the hologram. Recently, end-to-end deep learning-based methods have been utilized to reconstruct the object wavefront (as a surrogate for the 3D structure of the object) directly from a single-shot in-line digital hologram. However, massive data pairs are required to train deep learning models for acceptable reconstruction precision. In contrast to typical image processing problems, well-curated datasets for in-line digital holography does not exist. Also, the trained model highly influenced by the morphological properties of the object and hence can vary for different applications. Therefore, data collection can be prohibitively cumbersome in practice as a major hindrance to using deep learning for digital holography. In this paper, we proposed a novel implementation of autoencoder-based deep learning architecture for single-shot hologram reconstruction solely based on the current sample without the need for massive datasets to train the model. The simulations results demonstrate the superior performance of the proposed method compared to the state of the art single-shot compressive digital in-line hologram reconstruction method.