Figure 4
Quantitative analysis on the imaging accuracy of MSPI.
(a) is the target scene—an X-Rite standard color checker, which consists of 24 swatches owning different spectra. We use MSPI to image the color checker and obtain 10 multispectral images (450 nm–650 nm). Then we calculate the average of all the pixels’ spectra in each swatch as the swatch’s final recovered spectrum. (b) presents the spectral reconstruction error of each swatch in terms of root mean square error. (c) shows direct comparison between the recovered spectra and their ground truth counterparts on several representative swatches. The standard deviation of each wavelength band is also calculated and denoted by blue bars. Both the small reconstruction error and deviation validate MSPI’s high imaging accuracy.
