A Method of Invasive Alien Plant Identification Based on Hyperspectral Images
, Xianghuan Liu 1,2,†, Fukuan Wang 1,2,†, Zhongyu Sun 4, Long Yang 4, Xuejiao Pu 1, Yiqi Huang 2, Shuangyin Liu 3 and Wanqiang Qian 1,*Round 1
Reviewer 1 Report
Dear Authors,
The presented paper is undoubtedly interesting and shows direct applications. The research problem has been well presented against the background of world literature. In general, the issue is interesting and there is a justification for undertaking this research. A scope of research is clear, very specific, well-motivated. The subject (invasive alien plant identification based on hyperspectral images) is interdisciplinary and worth supporting.
According to the reviewer, it is required to define the conditions in which the researches were conducted - to determine the spectral distributions and correlated color temperatures of solar radiations. It was purposeful to conduct research during cloudy days, but it requires justification. It is necessary to carry out spectrophotometric measurements of solar radiation for various weather conditions and select the optimal conditions for collecting hyperspectral images of the tested plants.
Examples of data on solar spectral irradiance under changing conditions can be found e.g. in the work https://doi.org/10.1016/j.solener.2020.08.021.
Author Response
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Author Response File: 
Author Response.pdf
Reviewer 2 Report
The manuscript contains interesting, original results on the recognition of invasive alien plants. However, there are some comments to improve the manuscript:
Please correct the Keywords to remove the digits, e.g., 1 from "Hyperspectral analysis1;".
line 106: Have these 7 species been collected from each location indicated in lines 103-105?
lines 117-126: Please explain in more detail how 3359 raw spectral data samples were extracted from 80 images. How many from one image?
line 309: Why were 3345 samples used? It is written 3359 in line 282.
The resolution of Figures 3 and 4 could be higher.
Table 2: Species should be written in italics.
When describing and discussing the results, the authors may refer more to the morphology of the species. What caused the greater mixing of cases between some species shown in Figure 5.
line 434: It has been written "Hyperspectral data of invasive plants". Were the data only from images of leaves or from whole plants?
Have the authors tried to compare models based on data extracted from leaf images and taking into account data from flower images?
The directions for further research should be indicated in section 5. Conclusions.
Please adjust the references.
Author Response
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Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
The manuscript has been improved
