Fusion of complementary 2D and 3D mesostructural datasets using generative adversarial networks

TL;DR

This paper introduces a deep learning method using generative adversarial networks to fuse complementary 2D and 3D imaging data, enabling high-resolution, representative 3D mesostructural reconstructions crucial for material performance modeling.

Contribution

The authors develop a novel GAN-based approach to combine different imaging techniques for accurate 3D mesostructure reconstruction, surpassing previous statistical methods in fidelity and usability.

Findings

Validated with two dataset pairs showing high accuracy in mesostructural metrics.

Successfully applied to lithium-ion battery electrode data lacking high-res 3D images.

Demonstrated superiority over existing statistical reconstruction methods.

Abstract

Modelling the impact of a material's mesostructure on device level performance typically requires access to 3D image data containing all the relevant information to define the geometry of the simulation domain. This image data must include sufficient contrast between phases to distinguish each material, be of high enough resolution to capture the key details, but also have a large enough field-of-view to be representative of the material in general. It is rarely possible to obtain data with all of these properties from a single imaging technique. In this paper, we present a method for combining information from pairs of distinct but complementary imaging techniques in order to accurately reconstruct the desired multi-phase, high resolution, representative, 3D images. Specifically, we use deep convolutional generative adversarial networks to implement super-resolution, style transfer and dimensionality expansion. To demonstrate the widespread applicability of this tool, two pairs of datasets are used to validate the quality of the volumes generated by fusing the information from paired imaging techniques. Three key mesostructural metrics are calculated in each case to show the accuracy of this method. Having confidence in the accuracy of our method, we then demonstrate its power by applying to a real data pair from a lithium ion battery electrode, where the required 3D high resolution image data is not available anywhere in the literature. We believe this approach is superior to previously reported statistical material reconstruction methods both in terms of its fidelity and ease of use. Furthermore, much of the data required to train this algorithm already exists in the literature, waiting to be combined. As such, our open-access code could precipitate a step change by generating the hard to obtain high quality image volumes necessary to simulate behaviour at the mesoscale.