Abstract: A non-contact imaging apparatus for examining an object having complex surfaces or shape deformations. The imaging apparatus includes at least one imaging device for obtaining a scanned image of the exterior surfaces of the object being examined. A predetermined reference image) of an ideal model for the object is stored in a memory. An image register is coupled to the imaging device and to the memory containing the reference image of the ideal model for the object. A transformation estimator compares the scanned image to the reference image and provides a transform which maps the scanned image to the reference image and provides a set of registered object data points. One or more filter modules process the registered object data points with a priori information to reduce noise and to further enhance the accuracy and precision of the registration. A gauge estimator is coupled to the filter module.

Abstract: A non-contact imaging apparatus for examining an object having complex surfaces or shape deformations. The imaging apparatus includes at least one imaging device for obtaining a scanned image of the exterior surfaces of the object being examined. A predetermined reference image) of an ideal model for the object is stored in a memory. An image register is coupled to the imaging device and to the memory containing the reference image of the ideal model for the object. A transformation estimator compares the scanned image to the reference image and provides a transform which maps the scanned image to the reference image and provides a set of registered object data points. One or more filter modules process the registered object data points with a priori information to reduce noise and to further enhance the accuracy and precision of the registration. A gauge estimator is coupled to the filter module.

Abstract: A method for optical part shape measurement of a bare metal part to determine acceptability of the manufactured part. A variable level light source illuminates the part which is mounted on positioning equipment that allows the part to be moved from one position to another. Localized variations in light level are first determined and are compared with a reflectivity model of the part to determine optimization of the setup. Light level and viewing orientation of the part are adjusted to optimize the quality of test data obtained. Data quality is reviewed to ascertain a confidence factor for each location on the part's surface. Using both the reflectivity model and quality test results, data acquired for specified areas of the part is either accepted or rejected. Light level and part orientation are changed based upon how a reflectivity map of the part changes with each adjustment. New and acceptable data are now acquired for those areas of the part where data was previously discarded.

Abstract: A method for filtering undesired light reflections in a structured light measurement system during the inspection of shiny metal prismatic objects having uncoated prismatic surfaces, such as turbine blades, using polarized light.

Abstract: A method for optical part shape measurement of a bare metal part to determine acceptability of the manufactured part. A variable level light source illuminates the part which is mounted on positioning equipment that allows the part to be moved from one position to another. Localized variations in light level are first determined and are compared with a reflectivity model of the part to determine optimization of the setup. Light level and viewing orientation of the part are adjusted to optimize the quality of test data obtained. Data quality is reviewed to ascertain a confidence factor for each location on the part's surface. Using both the reflectivity model and quality test results, data acquired for specified areas of the part is either accepted or rejected. Light level and part orientation are changed based upon how a reflectivity map of the part changes with each adjustment. New and acceptable data are now acquired for those areas of the part where data was previously discarded.

Abstract: A method for filtering undesired light reflections in a structured light measurement system during the inspection of shiny metal prismatic objects having uncoated prismatic surfaces, such as turbine blades, using polarized light.