Hadamard变换光谱成像仪光谱复原矩阵修正算法

Spectrum recovery revision algorithm of Hadamard transform spectrometer

提出了基于数字微镜阵列(DMD)的Hadamard变换光谱成像仪编码模板的修正算法。利用原理样机获得了目标的光谱数据立方体,在分析DMD结构特点的基础上,建立了一种Hadamard变换光谱复原矩阵修正算法,用于修正DMD狭缝及像元尺寸与DMD尺寸不匹配对相关区域光谱数据产生影响。实验结果表明,修正算法提高了光谱图像的成像质量,同时保证了受影响区域复原光谱与未受影响区域复原光谱相似度达到98.88%以上。

An algorithm was proposed to improve the spectrum recovery of the Hadamard transform spectrometer that based on digital micro-mirror device （DMD）. Spectral data obtained by the imaging sensor were ftrst analyzed, and then considering the geometric dimension of the micro-mirror slit and the pixels, a spectral correction algorithm for recovery was proposed. Simulation results show that the algorithm can effectively improve the quality of the images, and there is over a 98.88% similarity between the spectrum of the revised dark fringe pixels and that of its adjacent normal pixels before correction.