Patent ID: 8077906
Filing Date: 2011-12-13
Classification: G06T

Abstract:
1. An apparatus for extracting a camera motion, comprising: a camera rotation information extraction means for acquiring a tilt and a yaw of a camera by extracting a horizontal line of a sea from an original image and focal length data provided by the camera, and acquiring a pan of the camera using the acquired yaw and long-distance background features of a vanishing point calculated from at least two first natural feature point tracking data existing in the original image; and a camera movement calculation means for calculating the camera movement from rotation angles obtained from the tilt, yaw, and pan of the camera and at least two second natural feature point tracking data existing on a sea plane of the original image, wherein the camera rotation information extraction means extracts camera rotation from horizontal line information of a sea and at least two natural feature point tracking data existing on a plane parallel to a sea plane, by utilizing prior knowledge about a background geometry, on the assumption that the focal length of the camera is known, and wherein the apparatus for extracting camera motion calculates tilt, yaw from horizontal line information, calculates pan from the prior calculated tilt, yaw and first natural feature point tracking data, and calculates camera translation from the prior calculated tilt, yaw and second natural feature point tracking data, where the aforementioned each camera movement parameter is calculated sequentially.