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. 2024 Sep 29;13:278. doi: 10.1038/s41377-024-01638-4

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 7 — a Sketch of the ECOS with a single filter unit. The first polarizer’s angle is rotated during the data acquisition to obtain the raw data frames. b Photo image of the used ECD, which is used to show its transparency. The ECD boundary is indicated by the orange box. c The reconstructed spectral image and the pseudo-colored images at selected wavelengths, based on 36 raw data frames that were acquired at different angles of the first polarizer. The original object is a jellyfish image displayed on the screen. d The reconstructed spectral images by only using four selected angles of the first polarizer in the mode of ‘m = 2’