Three-dimensional (3D) full-field imaging system

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Measurement of three-dimensional (3D) geometry is carried out by projecting structured patterns of light onto an object and acquiring 2D images of the deformed light patterns formed on the object surface. The 3D geometry is then reconstructed from these 2D images. We have developed a full-field measurement method to capture the entire 3D surface geometry in view from a single camera and projector position, rather than having to scan across the object. The method permits high resolution 3D imaging by generating a 3D coordinate for every image pixel. We have developed new techniques to achieve a major advantage in requiring only two light patterns to be projected and captured rather than three patterns used previously. Furthermore, the computations are simpler than earlier approaches. Both advantages greatly reduce processing to fully measure a 3D surface. The proposed equipment will enable us to exploit the advantages of our techniques in further developing the technology for numerous applications, such as measuring the shape of large objects, rapidly measuring the changing shape of objects over time while they are deforming, and acquiring 3D video sequences of changing human faces and bodies while they are moving, such as for medical, surveillance, and entertainment applications. Important applications of rapid 3D surface imaging also include part inspection in manufacturing, reverse engineering, modeling for virtual environments, agriculture, archaeology, forensics, and biometrics.