Abstract: A selective cooperative relaying method, the method including: determining, by a base station, whether a mobile station for which the base station provides a service is the mobile station necessary for direct transmission or is the mobile station necessary for cooperative relaying via a relay station; and selecting, by a base station, mobile stations using a simple relaying scheme, a cooperative transmission diversity scheme, or a cooperative receiving diversity scheme from mobile stations necessary for the cooperative relaying via the relay station.

Abstract: A method for restoration of building structure using infinity homographies calculated based on parallelograms includes: calculating, using two or more parallelograms, an infinity homography between those cameras which refer to an arbitrary camera; restoring cameras and the building structure on an affine space using the computed infinity homography and homologous points between images; and transforming the restored result onto the metric space using constraints on orthogonality of vectors joining the restored three-dimensional points, the ratio of lengths of the vectors and intrinsic camera parameters. As a result, intrinsic camera parameters, camera positions on the metric space and the structure of the building are restored. All the restoration is possible even when intrinsic camera parameters corresponding to all the images are not constant.

Abstract: A camera tracking apparatus for calculating in real time feature information and camera motion information based on an input image includes a global camera tracking unit for computing a global feature map having feature information on entire feature points; a local camera tracking unit for computing in real time a local feature map having feature information on a part of the entire feature points; a global feature map update unit for receiving the computed feature information from the global and local camera tracking units to update the global feature map; and a local feature selection unit for receiving the updated feature information from the global feature map update unit to select in real time the feature points contained in the local feature map. The local camera tracking unit computes the local feature map for each frame, while the global camera tracking unit computes the global feature map over frames.

Abstract: A multi-core multi-thread based Kanade-Lucas-Tomasi (KLT) feature tracking method includes subdividing an input image into regions and allocating a core to each region; extracting KLT features for each region in parallel and in real time; and tracking the extracted features in the input image. Said extracting the features is carried out based on single-region/multi-thread/single-core architecture, while said tracking the features is carried out based on multi-feature/multi-thread/single-core architecture.

Abstract: Provided are a method for extracting a correlation to generate 3D motion data, and a motion capture system and method using the extracting method to easily compose a humanoid character on a real background image. Cameras for motion capture are installed in a real background capture location (such as an outdoor location or in a studio), and the correlation between motion capture fixed cameras and a moving camera for capturing a real background image is obtained to capture 3D motion data prior to performing motion capture for integrating a humanoid character, so that even when there is interaction between a 3D figure and an actual prop such as a chair or table within the captured space, a humanoid character can easily be composed with the real background.

Abstract: A system and method for supporting augmented reality in an ocean scene is provided. According to the system and method, camera rotation information is extracted from horizontal line information of a sea extracted from an original image including a focal length and at least two first natural feature point tracking data existing on a sea plane and a plane parallel to the sea plane, using long-distance background features; camera movement is sequentially calculated from the camera rotation information and at least two natural feature point tracking data existing on the sea plane of the original image; and a computer graphics object is placed on a ground plane by importing camera position data, and a rendering is performed as moving the camera.

Abstract: Provided is a mouse interface apparatus using a camera, and system and method using the mouse interface apparatus. The mouse interface apparatus detects image coordinates (xi, yi) of a plurality of points existing on edges of a camera-photographing computer window image from the camera-photographing computer window image, obtains a homography using the detected image coordinates (xi, yi) and plane coordinates (Xi, Yi) of the plurality of preset points on a plane of a real computer window, the homography converting the detected image coordinates (xi, yi) into the plane coordinates (Xi, Yi) on the real computer window, converts an arbitrary coordinate on the camera-photographing image into the plane coordinate on the computer window according to a movement of the camera using the obtained homography, and positions a cursor on the plane coordinate to move the position of the cursor according to the movement of the camera.

Abstract: A ROM circuit is provided which can reduce the required area by simplifying a circuit construction. The ROM circuit generates N bit of data programmed at the respective cross section of output lines and word lines by decoding address signal. The ROM circuit comprises a decoder, a gate means, a memory cell array and a precharge means in which the decoder generates a word signal from an input address signal, the gate means supplied a word signal to a corresponding word line according to a clock signal, the memory cell array stores the desired data according to the combinational existence of MOS transistors at the respective cross section of the word line and the output lines, and the precharged means precharges the respective output lines according to the clock signal.