Patent ID: 7133570
Filing Date: 2006-11-07
Classification: G06T

Abstract:
1. For an optical sensor, a method for calibrating said optical sensor, said method comprising the steps of: providing a planar object, said planar object defining a plane; obtaining a first image of said planar object using an optical sensor; translating said planar object in a first direction in said plane relative to said optical sensor; obtaining a second image of said planar object; translating said planar object in a second direction in said plane relative to said optical sensor, said second direction being non-parallel to said first direction; obtaining a third image of said planar object; correlating said first, second and third images of said planar object to obtain translation data; generating a response function representing said translation data; deriving an inverse function from said response function; and applying said inverse function to calibrate subsequent images obtained by said optical sensor.