| 摘要 |
<p>An imaging apparatus (10) for examining an object (12) having smooth surfaces is used to determine shape deformations in the surface of object (12). The imaging apparatus (10) includes an imaging device (20) for obtaining a scanned image of the object (12) to be examined. A reference image of the object is stored in a memory (30). An image register (24) is coupled to the imaging device (20) and to the memory (30) containing the reference image of the object (12). The image register (24) stores patch information corresponding to both the reference image and the scanned image. A transformation estimator (26) is coupled to the image register (24), and provides a transform for registering the scanned image (22) to the reference image (30). A deformation estimator (28) is coupled to the transformation estimator (26) and to the image register (24). The deformation estimator is configured to utilize the transform and the patch information to determine shape deformations of the object (12). For airfoils, such as turbine blade. A six point nest and a robust closest patch algorithm are used. Furthermore coordinate measurement machines (CMM), hard gauges, and non-contact range sensors.</p> |
