Spectral filter selection for spectral reflectance recovery

Abstract

The accuracy of spectral recovery is directly affected by the spectral filter. Clarifying which parameters of the color filter will affect the spectral reconstruction accuracy can help us select the appropriate color filter and improve the reconstruction accuracy. Gaussian curve is used to simulate the spectral sensitivity curve of camera CCD channel. Taking color difference, goodness of fit coefficient and root mean square error as the result evaluation parameters, three, five and seven spectral filters with bandwidth of 20-60nm are selected for experiments. The influence of the number and bandwidth of camera channels on the spectral recovery results is explored by calculating the spectral recovery accuracy of Munsell spectral data set. The experimental results show that the number and bandwidth of spectral filters will affect the spectral recovery results.