Patent ID: 7587074
Filing Date: 2009-09-08
Classification: A61B,G06T

Abstract:
1. A method for obtaining a cyclic motion within a series of images depicting a moving object subject to composite motion containing a cyclic motion component having a cyclic period and a non-cyclic consistent component of a lower frequency than the cyclic motion component, the method comprising: a computer performing the steps of: (a) computing the composite motion between at least one pair of successive images, the composite motion represented by at least one vector; (b) computing the non-cyclic consistent component as an integral of the composite motion over the cyclic period; (c) computing a proportional part of the non cyclic consistent component for each of the at least one pair of successive images; and (d) for each of the at least one pair of successive images, subtracting the proportional part of the non-cyclic consistent component from the composite motion so as to obtain the cyclic motion component,