Patent ID: 7136171

Claim:
A method for identifying images of laser stripes projected onto the surface of an object in a non-contact gauge measurement system, comprising: identifying a type of object to be imaged and based on the object type generating a template, the template representing an expected laser striping pattern and a local orientation or flow field at each point in images for each of a plurality of cameras, the template being based on prior knowledge of the surface of the object; projecting one or more laser stripes onto a surface of the object; obtaining an image of said projected laser stripes; generating a matched filter for each pixel in said image from the template; filtering said image with said generated matched filter along curves, wherein the curves are either parallel or perpendicular to the orientation of respective flow fields, such that the filter correlates the laser stripes to an expected laser striping pattern and orients filtering according to an expected local orientation or flow field; and identifying the center of said projected laser stripes in said filtered image.