In this paper, a recently developed snapshot hyperspectral imaging (HSI) system based on Computed Tomography Imaging Spectroscopy (CTIS) is utilized to determine Brix and pH values in Sheegene 20 table grapes through Partial Least Squares Regression (PLSR) modeling. The performance of the CTIS system is compared with that of a state-of-the-art line scan HSI system by imaging 100 grapes across both platforms. Reference measurements of Brix and pH values are obtained directly using a refractometer and a pH meter, as these parameters are essential for assessing the quality of table and wine grapes. The findings indicate that the spectra captured by the CTIS camera correlate well with the reference measurements, despite the system's narrower spectral range. The CTIS camera's advantages, including its lower cost, portability, and reduced susceptibility to motion errors, highlight its potential for promising in-field applications in grape quality assessment.

翻译：本文采用一种基于计算层析成像光谱学（CTIS）技术新近开发的快照式高光谱成像系统，通过偏最小二乘回归（PLSR）建模，测定Sheegene 20鲜食葡萄的糖度与pH值。通过在两套平台上对100颗葡萄进行成像，将CTIS系统的性能与先进的行扫描高光谱成像系统进行对比。糖度与pH值的参考测量值直接使用折射仪和pH计获取，因这些参数对鲜食葡萄与酿酒葡萄的品质评估至关重要。研究结果表明，尽管CTIS系统的光谱范围较窄，但其相机采集的光谱数据与参考测量值具有良好相关性。CTIS相机具备成本较低、便于携带及对运动误差敏感度较低等优势，凸显了其在葡萄品质现场评估领域的应用潜力。