Patent application number | Description | Published |
20090154294 | METHOD AND SYSTEM FOR RECOGNIZING LOCATION BY USING SOUND SOURCES WITH DIFFERENT FREQUENCIES - Provided are a method and a system for recognizing a location to control the location of a moving object by installing an ultrasonic satellite transmitting an ultrasonic signal. The method includes generating a synchronizing signal at a plurality of the ultrasonic satellites. The ultrasonic satellites simultaneously transmit the ultrasonic signals respectively having different frequency from each other. A receiver of the moving object receiving the ultrasonic signal measures a distance between the receiver of the moving object and each ultrasonic satellite by classifying a frequency of the ultrasonic signal, and calculates a current location of the moving object by using the measured distance. The system includes ultrasonic satellites for transmitting ultrasonic signals, a moving object for recognizing a current location by receiving the ultrasonic signals from the ultrasonic satellites, a reference time broadcasting device for providing a synchronizing signal to the ultrasonic satellites and the moving object in operation, and a server for providing coordinates of the ultrasonic satellites to the moving object. | 06-18-2009 |
20100158353 | METHOD FOR RESTORATION OF BUILDING STRUCTURE USING INFINITY HOMOGRAPHIES CALCULATED BASED ON PARALLELOGRAMS - 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. | 06-24-2010 |
20100245593 | APPARATUS AND METHOD FOR CALIBRATING IMAGES BETWEEN CAMERAS - An apparatus for calibrating images between cameras, includes: a detector for detecting dynamic markers from images taken by a motion capture camera and a video camera; a 3D position recovery unit for recovering 3D position data of the dynamic markers obtained by the motion capture camera; a 2D position tracking unit for tracking 2D position data of the dynamic markers obtained by the video camera; a matching unit for matching the 3D position data and the 2D position data of the dynamic markers; and a calibrating unit for converting the 3D position of the dynamic markers on a spatial coordinate system into image coordinates on an image coordinate system of the video camera to calculate intrinsic parameters and extrinsic parameters of the video camera to minimize a difference between coordinates of the 2D position data and the image coordinates. | 09-30-2010 |
20110247050 | METHOD OF PAIRING TERMINALS WITH EACH OTHER AND TERMINAL FOR THE SAME - Provided is a method of pairing terminals with each other, and a terminal for the method. The method includes sensing a physical motion of a terminal caused by a user and outputting a sensing value, comparing a reception value received from an external terminal with the sensing value, and establishing a communication path with the external terminal according to the comparison result. | 10-06-2011 |
20110249095 | IMAGE COMPOSITION APPARATUS AND METHOD THEREOF - An image composition apparatus includes a synchronization unit for synchronizing a motion capture equipment and a camera; a three-dimensional (3D) restoration unit for restoring 3D motion capture data of markers attached for motion capture; a 2D detection unit for detecting 2D position data of the markers from a video image captured by the camera; and a tracking unit for tracking external and internal factors of the camera for all frames of the video image based on the restored 3D motion capture data and the detected 2D position data. Further, the image composition apparatus includes a calibration unit for calibrating the tracked external and internal factors upon completion of tracking in all the frames; and a combination unit for combining a preset computer-generated (CG) image with the video image by using the calibrated external and internal factors. | 10-13-2011 |
20120082347 | APPARATUS AND METHOD FOR CALCULATING MOTION OF OBJECT - Disclosed are an apparatus and a method for measuring a speed of a rotation body and recognizing a spin using a line scan. The present invention provides an apparatus and a method for calculating a motion of an object capable of acquiring line scan images using some lines of an area scan camera and calculating a three-dimensional speed and a three-dimensional spin of a rotation body by using a composite image in which the line scan images are coupled. The present invention can provide a realistic game or training at low cost by providing realistic physical simulation of the rotation body while allowing a competitive price when producing products by using the existing inexpensive camera. | 04-05-2012 |
20120148099 | SYSTEM AND METHOD FOR MEASURING FLIGHT INFORMATION OF A SPHERICAL OBJECT WITH HIGH-SPEED STEREO CAMERA - Disclosed is a method for automatically extracting centroids and features of a spherical object required to measure a flight speed, a flight direction, a rotation speed, and a rotation axis of the spherical object in a system for measuring flight information of the spherical object with a high-speed stereo camera. | 06-14-2012 |
20120150502 | SIMULATION METHOD OF FLYING TRAJECTORY OF BALL - Disclosed is a simulation method of a flying trajectory of a ball which flies while rotating. More particularly, An exemplary embodiment of the present invention provides an accurate simulation method of a flying trajectory of a flying ball by reflecting a roughness feature of the surface of the ball in which the flying trajectory of the ball is simulated by calculating drag force, lifting force, and gravity applied to the ball which files while rotating and the drag force and the lifting force are adjusted by a function for calculating air density and a function associated with a change in the force of wind. | 06-14-2012 |
20130135466 | METHOD AND APPARATUS FOR MEASURING ROTATION CHARACTERISTICS OF ROTATING BODY - Disclosed are a method and apparatus for measuring rotation characteristics such as rotation rate, rotation axis, and rotation angle of a rotating body. A method of measuring rotation characteristics includes extracting a rotating-body region from an image of the rotating body; extracting a surface pattern of the rotating body on the basis of brightness values of the extracted rotating-body region and acquiring rotation characteristics of the rotating body on the basis of change in the extracted surface pattern. Accordingly, it is possible to accurately measure rotation characteristics regardless of variation in brightness values of a surface region of the rotating body depending on illumination of a lamp, sensitivity of a camera, and exposure time of a camera. | 05-30-2013 |
20130151517 | FILE SEARCH APPARATUS AND METHOD USING TAG GRAPH - A file search apparatus includes a tag graph storage storing a tag graph. The tag graph includes tag nodes with tag words linked thereto, links/edges between pairs of the tag nodes having association relationships, where each tag node has a list of files tagged with the tag word of the tag node, a list of files attached to each of the tag nodes, such that the files are tagged by the corresponding tag words. A tag word searcher configured to search for the tag nodes containing the words from the user, among all tag nodes of the tag graph. A file searcher configured to search a candidate file, linked to tag words contained the tag nodes searched by the tag word searcher, to determine whether the candidate is a desired file. | 06-13-2013 |
20130158966 | METHOD OF COLLISION SIMULATION FOR SPINNING BALL - Disclosed is a method of simulating a collision trajectory of a ball which rotates and moves in a virtual sports game (for example, golf, baseball, soccer, or tennis). A method of collision simulation for a spinning ball includes: detecting collision of a spinning ball; calculating a velocity of the ball after colliding considering rotation of the ball and the friction with the ground; calculating a center point of the ball after colliding; and rolling and stopping the ball. The detecting of collision of a spinning ball includes: checking whether a segment connecting a center point in a previous position of the ball and a center point in the current position collides with the ground; and generating vectors of a lower part of the ball to check whether the vectors collide with the ground. | 06-20-2013 |
20140163915 | METHOD AND APPARATUS FOR TUNING TRAJECTORY MODEL OF BALL - Provided are a method and apparatus for tuning a trajectory model of a ball. The method includes generating a real trajectory of the ball based on a difference among a plurality of flight images for the ball, calculating kinetic characteristics of the ball based on the real trajectory, correcting at least one of the kinetic characteristics and a characteristic coefficient of the ground based on the real trajectory, and tuning a ball simulation trajectory based on the corrected at least one of the kinetic characteristics and the characteristic coefficient of the ground. A trajectory after the ball collides with the ground can be accurately generated. | 06-12-2014 |