End-to-end design framework for compressed on-chip pixel-wise spectro-polarimeters

T. A. Stockmans; F. Snik; J. M. Smit; J. H. H. Rietjens; M. Esposito; C. van Dijk; C. U. Keller

doi:10.1117/12.2633418

30 September 2022 End-to-end design framework for compressed on-chip pixel-wise spectro-polarimeters

T. A. Stockmans, F. Snik, J. M. Smit, J. H. H. Rietjens, M. Esposito, C. van Dijk, C. U. Keller

Proceedings Volume 12236, CubeSats and SmallSats for Remote Sensing VI; 122360E (2022) https://doi.org/10.1117/12.2633418
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Modern detector manufacturing allows spectral and polarimetric filters to be directly integrated on top of separate detector pixels. This enables the creation of CubeSat-sized spectro-polarimetric instruments that are not much larger than the detector and a lens. Redundancy inherent to the observed scene, offers the opportunity for sparse sampling in the form of not scanning all filters at every location. However, when there are fewer pushbroom steps than filters, data are missing in the resulting data cube. The missing, largely redundant data can be filled in with interpolation methods, often called demosaicers. The choice of filters and their precise layout influences the performance of the instrument after the demosaicing process. In these proceedings we describe a part of a design toolbox for both the filter layout and the optimum parameters for the reconstruction to a full spectropolarimetric data cube. The design tool is based on training a (neural) network and jointly updating the values of the filters and demosaicer. We optimized a filter layout by training on spectro-polarimetric remote observations of the Earth acquired by SPEX airborne. This optimised filter layout could reconstruct a validation scene from five overlapping snapshots (pushbroom steps), which would take 109 pushbroom steps when measuring with a classical layout and no reconstruction.

Conference Presentation

Citation Download Citation

T. A. Stockmans, F. Snik, J. M. Smit, J. H. H. Rietjens, M. Esposito, C. van Dijk, and C. U. Keller "End-to-end design framework for compressed on-chip pixel-wise spectro-polarimeters", Proc. SPIE 12236, CubeSats and SmallSats for Remote Sensing VI, 122360E (30 September 2022); https://doi.org/10.1117/12.2633418

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available