Gloss, Color and Topography Scanning for Reproducing a Paintings Appearance using 3D printing. High fidelity reproductions of paintings provide new opportunities to museums in preserving and providing access to cultural heritage. This paper presents an integrated system which is able to capture and fabricate color, topography and gloss of a painting, of which gloss capturing forms the most important contribution. A 3D imaging system, using fringeencoded stereo imaging, is extended to capture spatiallyvarying gloss, utilizing specular reflectance polarization. The gloss is measured by sampling the specular reflection around Brewsteru0027s angle, where these reflections are effectively polarized, and can be separated from the unpolarized, diffuse reflectance. Offcenter gloss measurements are calibrated relative to the center measurement. Offspecular gloss measurements, following from local variation of the surface normal, are masked based on the height map and corrected. Shadowed regions, caused by the 3D relief, are treated similarly. The area of a single capture is approximately 180x90mm at a resolution of 25x25micron. Aligned color, height, and gloss tiles are stitched together, registering overlapping color areas. These maps are inputs for a 3D printer. Two paintings were reproduced to verify the effectiveness and efficiency of the proposed system. One painting was scanned four times, consecutively rotated by 90 degrees, to evaluate the influence of the scanning system geometric configuration on the gloss measurement. Experimental results show that the method is sufficiently fast for practical application. The results can well be used for the purpose of physical reproduction and other applications needing firstorder estimates of the appearance. Our method to extend appearance scanning with gloss measurements is a valuable addition in the quest for realistic reproductions, in terms of its practical applicability and its perceptual added value, when added to color and topography.

Accurate 3D Measurement of Highly Specular Surface using Laser and Stereo Reconstruction In the production line, Inspection and Quality Control are essential to maintain the quality of the products. Same as the manufacturing process, the process of quality checking should also be automatic 1. In addition to automation in quality checking, the process needs to be simple, fast, accurate and costeffective. Machine vision is the technology and methods used to provide imagingbased automatic inspection and analysis 2. However, Reflective Surface of the object puts some limitations on traditional methods of machine vision. This research paper focuses on the development of a simple and accurate 3D measuring system for the inspection of reflective surface objects. The idea is to combine the concepts of stereo vision and sheet of light techniques. The main advantage of this method is that it overcomes the limitations of traditional methods and works robustly in ambient lighting condition. In this paper, we described a number of experiments carried out on different shapes and sizes of reflective surface objects using the proposed method. The qualitative and quantitative reconstructed 3D profiles of different shapes of reflective surface objects are shown. In the end, the results are compared with the ground truth threedimensional model of the acquited objects for accuracy evaluation.