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Real reproducing of 3D appearance with multi-projectors and cameras

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Rapid proto-typing of product is important technology that the computer science can contribute. Especially, the evaluation of realistic appearance decides the quality of the product in a final process. As the industrial design application, we have been developing the Appearance-based Display System by using the radiance control of projector and technique of mixed-reality. In this paper, we proposed a novel reproduction system of three-dimensional appearance with glossiness, which is controlled by two or more projection images. R. Raskar et al. proposed 2-pass rendering method to consider the 3D geometry. However, view-dependent shading, such as specular highlights is not considered in this method. Because the shading view is assumed to be the same as rendering view or user's viewpoint, the view-dependent shading could not ensure consistency. Therefore, in this paper, we divide 3D geometry into object shape, virtual light direction (shading direction), user's viewpoint (view-dependent rendering view) and projector position(view-independent rendering view). 3D geometry of the viewpoint and the object can be calibrated by the space encoding method with projector-camera system. According to the geometry calibration, the partial responsibility and compensation of the intensities errors such as occlusions, overlaps and attenuation for each projection is automatically decided. As the result, this system can generate the real appearance of gloss, color and shade on the mock object's surface.
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Document Type: Research Article

Publication date: January 1, 2009

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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