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Real-time Control of Appearance on an Object Using a High-Luminance PC Projector and Graphics Hardware

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In the present paper, we propose a technique to control the appearance on an object in real time using a high-luminance PC projector and graphics hardware. We have previously proposed an image projection technique to reproduce the appearance of a real object on a mock object using a high-luminance projector. By controlling the projected image, the reflected radiance on the mock object is matched to that on the real object. However, in our previous study, only preliminary experiments were performed by matching the appearance empirically. The present paper uses ray tracing to reproduce the distribution of the reflected radiance for appearance matching. It is necessary to measure the bi-directional reflectance distribution function of the objects and the geometry between the projector and the observer's eyes. Since the observer's eyes move with the head in evaluating the appearance of the object, we performed a real-time reproduction of gloss appearance with the movement of the observer's position. The observer's position is detected by an electromagnetic position sensor. Graphics hardware is used in the real-time reproduction to calculate the ray tracing at high speed and render the appearance according to the observer's eye position in real time. Observer rating revealed that little difference in appearance was perceived between the real object and the projected mock object.
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Document Type: Research Article

Publication date: January 1, 2005

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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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