Abstract
We have been studying on measuring, recording, and rendering a painting for the purpose of digital archive for art paintings. So far, a method was developed for estimating the surface properties for oil paintings with gross and specularity, and for determining a 3D light reflection model so that realistic images of the paintings were rendered. The present paper deals with water painting as the art paintings, the surface properties of which are essentially different from the oil paintings. The surface has no gross, but has roughness based on the drawing paper itself. These characteristics are taken into account in digital archiving of water paintings. We use a multi-band imaging system for measuring an paining, and estimating surface normal and spectral reflectance of the surface. The Oren-Nayar model is used as a reflection model. Finally images of the painting are rendered using the estimated surface properties.
