We propose the full spectral reflectance texture acquisition method for accurate color rendering. Full spectral reflectance texture contains spectral reflectance at each texcel. This texture can be used for full spectral rendering which is able to deal with important color phenomena such as metamerism and fluorescence. We have developed multi-band 3D scanner with the cooperation with the MINOLTA. It can measure 3D shape and multi-band texture image at the same time. Texture image is always affected by illuminant, shade and shadows. Therefore, irradiance at each polygon is needed to avoid these effects. Polygon-wise irradiance was calculated by using omnidirectional light distribution that surrounds measured object and hidden polygon information which describes the region that a ray of light is occluded by other polygon. In the experiment, we measured the spectral reflectance texture of six colored box and skin of human male. The experiment showed that proposed method is effective for estimation of full spectral reflectance texture.
Nobuhiko Tamura, Norimichi Tsumura, Yoichi Miyake, "Accurate Measurement of Full Spectral Reflectance Texture by Removing Shadow and Illuminant Effects" in Proc. IS&T CGIV 2004 Second European Conf. on Colour in Graphics, Imaging, and Vision, 2004, pp 321 - 325, https://doi.org/10.2352/CGIV.2004.2.1.art00064