Spectral imaging systems using liquid crystal tunable filters (LCTFs) can be applied to color reproduction. However, the spatially-varying spectral shift caused by inherent LCTF characteristics affects the results’ accuracy. This paper proposes a spectral shift correction method employing high-chroma color patches as calibration targets, which reduces the color difference from 3.67 to 1.98 (CIEDE2000). Additionally, a method is developed for adaptively selecting wavebands for image acquisition according to the target’s pre-estimated spectral reflectance, whereby color differences are reduced by 21.2% over the conventional method with a limitation of 15 spectral images acquired. These methods avoid LCTF’s drawbacks and exploit its tunability, making it more suitable for color-relevant applications.

使用液晶可调滤光片（LCTF）的光谱成像系统可以应用于色彩再现。但是，由固有LCTF特性引起的光谱变化在空间上会影响结果的准确性。本文提出了一种使用高色度色块作为校准目标的光谱偏移校正方法，该方法将色差从3.67减少到1.98（CIEDE2000）。另外，开发了一种用于根据目标的预先估计的光谱反射率来自适应地选择用于图像采集的波段的方法，从而与常规方法相比，色差减少了21.2％，限制了15个光谱图像的采集。这些方法避免了LCTF的缺点，并利用了其可调性，使其更适合与颜色相关的应用程序。