“…It is well known, near-infrared (NIR) spectroscopy as a simple and quick tool has been effectively utilized in various fields for quantitative and qualitative analysis, such as agriculture [1] [2] [3] [4] [5], food [6] [7], environment [8] [9], biomedicine [10]- [15], medicine [16] [17], and so on [1] [18]. However, the used NIR equipment is mainly indoor general-purpose equipment, which is bulky, costly, and cannot meet the needs of large-scale applications, especially for the applications in the agricultural field.…”