Abstract = {This technical report describes a method for capturing spatially varying appearance properties for paintings by augmenting conventional museum imaging with a linear light source scanner. A fluorescent source commonly used as LCD backlights was scanned in both vertical and horizontal directions at high spatial sampling. The source and camera were both cross and parallel polarized and differences used to extract specular information. This in turn was used to estimate spatially varying BRDF, defined with Ward’s isotropic model, and surface normal. A cross-polarized dual-RGB camera system and a pair of studio Xenon strobes placed at 45° on either side of the painting were used to capture a colorimetrically accurate diffuse albedo. The system was tested on several small paintings during early 2011, one made using oil paints and having spatially varying gloss, and one made using acrylic dispersion paints and varnished to a high gloss. The system was able to measure and render the total appearance of these paintings with reasonable success, validated by imaging both paintings with a single strobe without its reflector and without polarizing, approximating a near-field point source. The results indicated opportunities for hardware and software improvements.},
        Address = {Rochester, New York, United States},
        Author = {Tongbo Chen and Roy S. Berns},
        Institution = {Rochester Institute of Technology, College of Science, Center for Imaging Science,Munsell Color Science Laboratory},
        Keywords = {art-si; art-si-3d imaging},
        Month = {October},
        Number = {},
        Title = {Measuring the Total Appearance of Paintings Using a Linear Source, Studio Strobes, and a Dual-RGB Camera},
        Url = {http://www.cis.rit.edu/DocumentLibrary/admin/uploads/CIS000174.pdf},
        Year = {2012}}