| US 7,580,546 B2 | ||
| Marker-free motion capture apparatus and method for correcting tracking error | ||
| Sung-Eun Kim, Daejon (Korea, Republic of); Chang-Joon Park, Daejon (Korea, Republic of); In-Ho Lee, Daejon (Korea, Republic of); and Hyun-Bin Kim, Daejon (Korea, Republic of) | ||
| Assigned to Electronics and Telecommunications Research Institute, (Korea, Republic of) | ||
| Filed on Nov. 18, 2005, as Appl. No. 11/283,191. | ||
| Claims priority of application No. 10-2004-0103791 (KR), filed on Dec. 09, 2004; and application No. 10-2005-0025158 (KR), filed on Mar. 25, 2005. | ||
| Prior Publication US 2006/0126895 A1, Jun. 15, 2006 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—103 [382/206] | 14 Claims |
| 1. A marker-free motion capture apparatus having a function of correcting a tracking error, comprising:
a grouping means for grouping feature candidates located within a threshold distance on a three-dimensional space at a previous
time (t−1);
a feature point selecting means for generating a first curve connecting a predetermined number of feature points, and selecting
a feature candidate closest to the first curve among the grouped feature candidates as a feature point of a previous time
(t−1);
a feature point correcting means for generating a second curve connecting a predetermined number of feature points including
the feature point of a previous time (t−1) selected at the feature point selecting means, and correcting a feature point of
a current time (t) calculated based on a Kalman filtering scheme using the second curve; and
a controlling means for calculating a location of a feature point of each time using a Kalman filtering scheme and generally
controlling the means of the marker-free motion capture apparatus.
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