Patent ID: 6681057
Filing Date: 2004-01-20
Classification: G06K,G06T

Abstract:
A method for performing image registration between an input image and a reference image, wherein the reference image comprises a first plurality of pixels, the method comprising:receiving the input image, wherein the input image comprises a second plurality of pixels, wherein the input image differs from the reference image by one or more of position, angle and scale; transforming the input image to approximate the reference image, wherein said transforming the input image uses PID control techniques, wherein said transforming produces a new input image; calculating a difference between the new input image and the reference image, resulting in an error; wherein said transforming the input image and said calculating the difference are performed one or more times until the error is less than a given value; and generating an estimate in response to said transforming and said calculating the difference, wherein the estimate comprises at least one of a position value, an angle value and a scale value which defines an affine transformation of the input image with respect to the reference image.