Image analysis – Applications – Manufacturing or product inspection
Patent
1995-08-31
2000-02-15
Mehta, Bhavesh
Image analysis
Applications
Manufacturing or product inspection
382147, 382150, 382151, G06K 900
Patent
active
060261765
ABSTRACT:
A method of inspecting an image to locate a ball grid array surface-mounted device includes the steps of inspecting the image to find its surface features and to determine their locations (referred to herein as their "observed" locations); comparing expected locations of those features with the observed locations to identify missing surface features; reinspecting the image in the vicinity of apparently missing surface features to verify if the feature is really missing or to find those features and to determine their "observed" locations; and determining, from the observed locations of the surface features, the position and/or angle of the ball grid array surface-mounted device. The invention can be used to determine the position and/or angle of ball grid array surface-mounted devices with surface features in any of many array configurations, e.g., a regular lattice, a checker board lattice, a reverse checker board lattice, a regular lattice with a holes, and a custom lattice.
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