Towards the Future of Ubiquitous Hyperspectral Imaging: Innovations in Sensor Configurations and Cost Reduction for Widespread Applicability

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This study proposed a broad overview of recent work on the development of hyperspectral sensor configurations. This paper is well written and easy to follow, however, needs further revisions before publication. See below for detailed comments.

(1) The abstract need to be slightly improved. Contributions are not more explicit to make an originality.

(2) The use of hyperspectral imaging for urban scene mapping and related studies should be mentioned in the Introduction Section，such as [1].

[2] Developing an intelligent cloud attention network to support global urban green spaces mapping [J] ISPRS Journal of Photogrammetry and Remote Sensing, 2023,198(04): 197-209.

 (3) The introduction part is very weak. The introduction is required to clarify what the improvements you have made or what the main open problem you have solved regarding the current study instead of just listing what other researchers' academic results one by one.

 

(4) Please provide some challenges about this paper in Conclusions part.

(5) The English language needs improvement and grammar and language editing is required particularly in the introduction part of the paper for improving the readability.

Comments on the Quality of English Language

 Minor editing of English language required.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

In this work, the authors present a review of the state of the art in sensing modalities for hyperspectral imaging, where the authors paid special attention to low-cost implementations. In my opinion, the manuscript needs more in depth discussions and a cohesive presentation.  The main drawback of this work is the lack of attention to recent sensing modalities based on liquid crystal tunable filters (LCTF) and multi/hyperspectral illumination, which could provide alternatives to classical techniques based on spectrometry, for example see the following references:

 

>> LCTF-based Hyperspectral Imaging

 

Karel J. Zuzak, Robert P. Francis, Eleanor F. Wehner, Jack Smith, Maritoni Litorja, David W. Allen, Chad Tracy, Jeffrey Cadeddu, and Edward Livingston "Hyperspectral imaging utilizing LCTF and DLP technology for surgical and clinical applications", Proc. SPIE 7170, Design and Quality for Biomedical Technologies II, 71700C (23 February 2009); https://doi.org/10.1117/12.816279

 

Lei Zhang, Yu Yang, Shuai Zhao, Tianci Chen, Kaiyang Yu, Keyi Wang, Chengfeng Xie, Mengyu Wang, and Bolin Cai, "Hyperspectral full polarization imaging system based on spatial modulation," Appl. Opt. 62, 1428-1435 (2023) https://doi.org/10.1364/AO.478331

 

Xi Wang, Yuhan Zhang, Xu Ma, Tingfa Xu, and Gonzalo R. Arce, "Compressive spectral imaging system based on liquid crystal tunable filter," Opt. Express 26, 25226-25243 (2018) https://doi.org/10.1364/OE.26.025226

 

Dennis Wirth, Brook Byrd, Boyu Meng, Rendall R. Strawbridge, Kimberley S. Samkoe, and Scott C. Davis, "Hyperspectral imaging and spectral unmixing for improving whole-body fluorescence cryo-imaging," Biomed. Opt. Express 12, 395-408 (2021) •https://doi.org/10.1364/BOE.410810

 

>> Multi-spectral Illumination and monochromatic camera

 

Sujit Kumar Sahoo, Dongliang Tang, and Cuong Dang, "Single-shot multispectral imaging with a monochromatic camera," Optica 4, 1209-1213 (2017) https://doi.org/10.1364/OPTICA.4.001209

 

Julius Tschannerl, Jinchang Ren, Huimin Zhao, Fu-Jen Kao, Stephen Marshall, Peter Yuen, “Hyperspectral image reconstruction using Multi-colour and Time-multiplexed LED illumination,” Optics and Lasers in Engineering, Volume 121, 2019, Pages 352-357, https://doi.org/10.1016/j.optlaseng.2019.04.014.

 

M. A. T. Monsalve, G. Osorio, N. L. Montes, S. Lopez, S. Cubero and J. Blasco, "Characterization of a Multispectral Imaging System Based on Narrow Bandwidth Power LEDs," in IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-11, 2021, Art no. 2000111, doi: 10.1109/TIM.2020.3010109

 

Fuzhou Shen, Hancheng Deng, Lejun Yu, Fuhong Cai, “Open-source mobile multispectral imaging system and its applications in biological sample sensing,” Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Volume 280, 2022, https://doi.org/10.1016/j.saa.2022.121504.

 

Another drawback of this work is a in-depth discussion on the research gaps in low-cost hyperspectral devices’ fabrication with respect to works described in Table 1. In fact, the presentation of the references is quite detailed in Section 3.1 and 3.2, but through a table in Section 3.3. Furthermore, Table 1 does not describe a consistent description of the same features of the hyperspectral systems, for example spectral range, spectral resolution, 2D pixels dimensions and cost; so it is difficult to compare the selected references. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

In the manuscript ‘Towards the Future of Ubiquitous Hyperspectral Imaging: Innovations in Sensor Configurations and Cost Reduction for Widespread Applicability’ Podlesnykh and co-workers present review explores the latest innovations in hyperspectral sensor configurations, focusing on design improvements, sensor modifications, and strategies for cost reduction.

Overall, the manuscript presents an interesting approach but some minor comments I would like to point out to the authors.  Please see some comments below:

1.       Could the authors clarify some relevance of "RMS spot size" in relation to performance optimisation in hyperspectral systems?

2.       Could the authors comment why is there a preference for CMOS in some HSI applications but CCD in others? How do these sensors influence imaging performance?

3.       Could the authros provide more insight into how the low-cost devices in Table 1 perform under real-world conditions?

 

4.       Could the authors include case studies where these innovations have been successfully implemented in practice in the conclusions of this review?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

No

Reviewer 2 Report

Comments and Suggestions for Authors

The authors have addressed all my previous comments from the initial revision stage. Also, the authors have now a consistent description for Table 1.

Comments on the Quality of English Language

The writing style needs minor improvement, for example in lines 31 "Hyperspectral data differs from multispectral data in that it has a much larger number of spectral channels"  and 356 "cheapening".