Abstract
An imaging system was build using a telecentric optics in image space and a CCD image sensor that was movable along the optical axis in order to keep a perfect perspective projection during focusing. It was successfully applied to establish omni-directional measurement of a drill bit as an example of shiny metallic objects based on the shape-from-focus method. Negative data from glare regions were replaced with overlapping positive data obtained from neighboring viewpoints. Usage of a table that precisely rotates the object simplified registration of the multiple-view data. Finally, a fine mesh connecting surface points (corresponding pixels in images) can be generated to produce a three-dimensional graphic model with texture.
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