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 high-speed marker-free motion capture, which is capable of powerfully detecting a body's feature points corresponding to a body's end portions such as a head, hands, feet, trunk, arms and legs at a high speed in an illumination change or background or noises of cameras. The extracted feature points of the body can be directly tracked stably in a 3-dimensional space. The position errors of the feature points due to the change of the illumination conditions or a shadow can be automatically corrected and the feature points can be stably tracked with respect to overlapping and disappearance of the feature points. Further, when coordinates of the middle joints are estimated using 3-dimensional coordinates of the extracted feature points of the body, the present invention restores a human model by estimating the positions of the middle joints of the actor with high accuracy without using a motion database, thereby securing the stability and reality of the 3-dimensional motion data required in the motion capture.

Abstract: The present invention relates to a quadrupole mass analyzer which is a core equipment of a majority of mass analyzer, particularly to a quadrupole mass analyzer with a hyperbolic surface made of quartz which is capable of enhancing resolving power and analytical performance of a mass analyzer.

Abstract: A method for reconstructing a three-dimensional structure using silhouette information on a two-dimensional plane is provided. The method includes: obtaining silhouette images; creating a cube on a three-dimensional space using the silhouette images; calculating vertex coordinates on a two-dimensional image plane by projecting eight vertices of the three-dimensional cube on a two-dimensional image plane of a first camera; dividing into multiple inner voxels by dividing sides formed by the eight vertices by a divider; dividing into a predetermined number of regions by dividing sides connecting the coordinates by a predetermined divider; assigning indices by matching cubes of the three-dimensional cube to square regions on the two-dimensional image plane in one to one manner; storing indices of regions where the square regions meets with a first silhouette image; and reconstructing three-dimensional structure by finding common indices through repeatedly performing the steps using other silhouette images.

Abstract: A method for estimating three-dimensional positions of human joints includes the steps of: a) marker-free motion capturing a moving figure for obtaining a multiview 2D image of the moving figure, and extracting a 2D feature point corresponding to a bodily end-effector; b) three-dimensionally matching the 2D feature point corresponding to the bodily end-effector, and recovering the 3D coordinates of the bodily end-effector; c) generating a 3D blob of the bodily end-effector, generating a virtual sphere with a radius that is a distance from a center of the 3D blob to a joint, and projecting the virtual sphere onto the obtained multiview 2D image of the moving figure; and d) detecting a coinciding point of a surface of the projected virtual sphere and the multiview 2D image of the moving figure, and estimating a 3D position corresponding to the coinciding point as a 3D position of the joint.

Abstract: Provided is a method for magnifying an image by interpolation. The method including: a) setting m×m local windows and calculating a direction of each m×m local window; b) when a linear direction exists in an m×m local window, considering an edge exists; c) when a linear direction does not exist in the m×m local window, dividing the m×m local window into m/2×m/2 sub windows and calculating directions of the m/2×m/2 sub windows; d) when the directions of the m/2×m/2 sub windows exists toward the center of the m×m local window, considering a corner exists in the m×m local window; and e) selecting pixels located in a virtual line that goes along in the linear direction or in the directions to calculate a new pixel value by using the pixels.

Abstract: A marker-free motion capture apparatus having a function of correcting a tracking error and a method thereof are disclosed. The apparatus includes: a grouping unit for grouping feature candidates located within a threshold distance on a three-dimensional space at a previous time; a feature point selecting unit for generating a first curve connecting a predetermined number of feature points, and selecting a feature candidate closest to the first curve as a feature point of a previous time; a feature point correcting unit for generating a second curve connecting a predetermined number of feature points including the feature point of a previous time, and correcting a feature point of a current time calculated based on a Kalman filtering scheme using the second curve; and a controlling unit for calculating a location of a feature point of each time using a Kalman filtering scheme and generally controlling the marker-free motion capture apparatus.

Abstract: Provided is a background recovering apparatus for deleting an object of an arbitrary region and recovering a background covered with the object. The apparatus includes a storing block for storing the input image sequence, and storing the three dimensional (3D) position and posture information, and focal length information; a geometric information extracting block for extracting 3D with respect to the background; a background image generating block for generating the background image; and a background image inserting block for recovering the background by inserting the background image into an arbitrary region of a first view point.

Abstract: In a method for controlling a posture of an articulated object, a user inputs an initial configuration of the object, a base point, an end point, a target point and a method for updating the posture. It is determined whether the number of joints positioned between the base and the end points is larger than or equal to three. If the number is smaller than or equal to two, it is determined whether the method for updating the posture is a two-segment or three-segment based method or another method for moving an intermediate end point. If the method is two-segment or three-segment based, the number is rechecked. If the number is smaller than or equal to two, the posture is modified according to the two-segment or three-segment based method. If the posture satisfies a predetermined condition, it is displayed on a screen.

Abstract: The present invention relates to an apparatus and method for a high-speed marker-free motion capture, which is capable of powerfully detecting a body's feature points corresponding to a body's end portions such as a head, hands, feet, trunk, arms and legs at a high speed in an illumination change or background or noises of cameras. The extracted feature points of the body can be directly tracked stably in a 3-dimensional space. The position errors of the feature points due to the change of the illumination conditions or a shadow can be automatically corrected and the feature points can be stably tracked with respect to overlapping and disappearance of the feature points.

Abstract: A surface inspecting apparatus comprises an image achieving unit for achieving an image of a surface of an object; and a controller for providing the symmetry feature of the spot or contaminant by using the magnitude of the intensity gradient and the orientation of the intensity gradient for each pixel of the achieved surface image to thereby detect a spot or contaminant on the surface. The controller detects the spot or contaminant by using a symmetry magnitude map formed by the magnitude of the intensity gradient and the orientation of the intensity gradient of each pixel, after achieving the magnitude of the intensity gradient and the orientation of the intensity gradient by using a gradient operator on the achieved surface image, wherein the symmetry magnitude map provides the internal symmetry feature of the spot or contaminant.

Abstract: In a method for controlling a posture of an articulated object, a user inputs an initial configuration of the object, a base point, an end point, a target point and a method for updating the posture. It is determined whether the number of joints positioned between the base and the end points is larger than or equal to three. If the number is smaller than or equal to two, it is determined whether the method for updating the posture is a two-segment or three-segment based method or another method for moving an intermediate end point. If the method is two-segment or three-segment based, the number is rechecked. If the number is smaller than or equal to two, the posture is modified according to the two-segment or three-segment based method. If the posture satisfies a predetermined condition, it is displayed on a screen.

Abstract: Methods for manufacturing a water hammer arrester having an endurance against pressure of a fluid as well as excellent productivity. There is provided Methods for manufacturing a water hammer arrester comprising steps of: deforming plastically an end of a work piece for a housing to close it by pressing the end toward a center thereof while the work piece is rotated at high speed, the work piece is a brass pipe having predetermined length; forming a housing by cutting a closed part in prescribed thickness; filling up a gas and inserting a piston within the housing to prevent the gas from leaking; forming a connecting part having smaller diameter than the housing by pressing an outside of an open end of the housing provided with poured gas and the piston; and mounting a connector to the connecting part.

Abstract: A water hammer arrester constructed with a cylindrical housing having a closed upper end and an internal pressure chamber. A piston slidably installed within the housing to receive a reaction force medium such as gaseous nitrogen, provides a space that communicates with an integral pressure chamber within the closed upper end of the housing. A threaded connector bearing a nipple circumscribed with a plurality of circumferential grooves is crimped into the neck of the lower end of the housing.

Abstract: Traction apparatus for medically and physically treating herniated nucleosus pulposus or sprain and strain is disclosed. The traction apparatus comprises an upper support frame, a lower support frame, and a plurality of tubes. The traction apparatus further includes an exercising device. The upper support frame encircles the upper part of the therapy region and has two free ends positioned in space relation. The lower support frame encircles the lower part of the therapy region and hits two free ends positioned in space relation. The tubes are expandable to provide traction on the therapy region and are filled up with fluid which is generated by a fluid generating device. Preferably, the fluid generating device is a programmed controller including additionally pressure regulating function, timing function, intermittent ON and OFF function, etc.