| Summary |
| We present a new photogeometric framework for acquiring highly-detailed models of 3D objects and using these models for enabling interactive and close-up digital inspection and appearance alteration. Our framework meets design goals of being fast, robust, and easy-to-use. Further, our framework demonstrates a setup of off-the shelf digital projectors and cameras, without any prior calibration, that enables a trade-off from coarse acquisitions to highly-detailed and optimized models. A key inspiration for our framework is that of simultaneously supporting a photometric and geometric-based approach thus producing a photogeometric modeling system. This combination permits selfcalibration, capitalizes on the high-visual details of photometric methods, and supports the precision of a geometric technique. |
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| Virtual Restoration |
| We present a system to virtually restored damaged or historically significant objects without needing to physically change the object in any way. This work addresses both creating a restored synthetic version of the image as viewed from a camera and projecting the appropriate light patterns using digital projectors to give the illusion of the object being restored. The restoration algorithm minimizes an energy metric which enforces a set of contour criteria over the surface of the object. The visual compensation method develops a formulation that is designed to obtain bright compensations under a specified maximum amount of light. |
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| Photogeometric Structured Light |
| Structured-light methods actively generate geometric correspondence data between projectors and cameras in order to facilitate robust 3D reconstruction. We present Photogeometric Structured Light whereby a standard structured light method is extended to include photometric methods. Photometric processing serves the double purpose of increasing the amount of recovered surface detail and of enabling the structured-light setup to be robustly self-calibrated. Further, our framework uses a photogeometric optimization that supports the simultaneous use of multiple cameras and projectors and yields a single and accurate multi-view 3D model which best complies with photometric and geometric data. |
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| Digital Inspection: An Interactive Stage for Viewing Surface Details |
| In a wide range of applications, we often wish to quickly inspect and visualize historically significant and highly detailed objects. For such scientific illustration applications, often the focus is on high-frequency surface details and on conveying important shape and feature information. In this work, we provide a complete system to visualize objects on the spot. Our approach uses photogeometric processing, combined with a set of visualization methods tuned to the interactive inspection and analysis of objects. Highly accurate models are acquired in about 30 seconds using an uncalibrated setup, obtaining both detailed surface geometry and detailed surface normal information. Subsequently, captured objects are visually tracked enabling hand-held manipulation and visualization. |
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 Research supported by NSF MSPA-MCS Grant No. 0434398 |
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