Three-dimensional reconstruction of surface profiles
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Accused Products
Abstract
A method for reconstructing the profile of strictures on surfaces. According to said method, at least two images of the same area of the surface that is to be analyzed are evaluated, said images being recorded from a nearly vertical perspective, for example, and the surface being illuminated from different directions at a flat angle thereto. Elevations or depressions on the surface thus cast a distinct shadow in the recorded images, the position of which varies according to the incident light. Inclined areas can be identified by means of a brighter reflection. The vertical profile of a structure on the surface can be determined, and the shape of a fin can hence be reconstructed, for example, by analyzing shadow contours and outlines of bright areas. Even flat inclination changes can be determined by integrating the shape-from-shading process so as to evaluate brightness patterns such that a 3D reconstruction of the surface can be obtained, which matches the original well.
19 Citations
26 Claims
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1-13. -13. (canceled)
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14. A process for optical detection and reconstruction of surface profiles, comprising
illuminating the surfaces to be examined from different directions with a shallow angle of incidence, preparing images of the surface from a camera position with an acute angle to the surface, and extracting the contours of cast shadows on the images and determining the elevation profiles or relief of structures based on light incidence angle and camera position.
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25. A process for optical detection and reconstruction of planetary surface profiles, comprising
illuminating the surfaces to be examined from different directions with a shallow angle of incidence, preparing images of the surface from a camera position with an acute angle to the surface, and extracting the contours of cast shadows on the images and determining the elevation profiles or relief of structures based on light incidence angle and camera position.
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26. A process for optical detection and reconstruction and inspection of surfaces of industrially manufactured components, comprising
illuminating the surfaces to be examined from different directions with a shallow angle of incidence, preparing images of the surface from a camera position with an acute angle to the surface, and extracting the contours of cast shadows on the images and determining the elevation profiles or relief of structures based on light incidence angle and camera position.
Specification