基于液晶可调变滤色器的光谱图像获取及颜色重建方法

Methods of spectral image capture and color reconstruction based on liquid crystal tunable filter technology

基于液晶可调变滤色器(LCTF)的光谱成像系统具有光谱分辨率高、结构紧凑、控制灵活等特点。搭建了一套可见光波段的高分辨率LCTF光谱成像系统,对系统的光谱图像获取及彩色图像重建方法进行了研究;建立了系统的光谱及颜色重建模型;基于标准色卡及标准测色系统,对该系统的颜色复现效果进行了实验验证;实验结果表明,该LCTF光谱成像系统的彩色图像颜色复现精度达可到较小色差水平。

The spectral imaging system based on liquid crystal tunable filter （LCTF） has the advantages such as high spectral resolution, compact structure, and flexible control. A high-resolution LCTF spectral imager within visible band is constructed, and methods of spectral image capture and color image reconstruction is studied. Effects of color recon- struction are verified by experiments with the standard color card and the standard color measurement system. The re- sults indicate that color reconstruction of images captured by the LCTF spectral imaging system has a smaller color differ- ence.