STUDY ON THE COMPARISON OF TWO SPECTRAL REFLECTANCE RECONSTRUCTION METHODS BASED ON AGILE SPECTRUM IMAGING AND LIQUID CRYSTAL MODULATION

Spectral reflectance plays an important role in colour representation of the object. There are a lot of methods to reconstruct spectral reflectance. Two spectral reflectance reconstruction methods based on agile spectrum imaging and liquid crystal modulation are compared in this paper. CIE1931 colour difference, Root Mean Square Error and Spectral Goodness of Fit Coefficient are adopted as three evaluating indicators to compare the two methods. From the results of the comparison, the method based on agile spectrum imaging is better than the method based on liquid crystal modulation in the aspects of the max, average and standard deviation of the colour difference and Root Mean Square Error. What's more, the average Spectral Goodness of Fit Coefficient of the method based on agile spectrum imaging is 0.9967, which is 1.4 % larger than the method based on liquid crystal modulation and reach the standard of spectral reconstruction. The comparison of these two methods contributes to the further study on reconstructing spectral reflectance and acquiring multispectral images by single bucket.