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. 2020 Aug 17;10:13902. doi: 10.1038/s41598-020-70849-7

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© The Author(s) 2020

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Optical configuration of imaging using a RAP mask. (a) Manual training process involving axially scanning a pinhole and changing the illumination wavelength at every location and recording the spatio-spectral library using a monochrome camera for a QRAP. (b) The recorded library is catalogued for different wavelength and depth parameters. (c) A thick multispectral object is placed within the calibrated space and a single camera shot is recorded for the object under identical experimental conditions. (d) The image of the object in five dimensions is reconstructed by a computational correlation of the object intensity pattern with the library, ‘ $*$ ’ is a 2D correlator.