Abstract:
본 발명은 마커 프리(marker-free) 해상 카메라 트래킹 시스템(tracking system)에서 해상 장면 영상 합성에 있어서 카메라의 움직임을 구하기 위해 필요한 수평선을 추출하는 장치 및 방법에 관한 것이다. 이와 같은 본 발명은 제공되는 해상 장면 동영상에서 수평선 부근에 관심영역(ROI: Region Of Interest)을 지정하고, 이 관심영역 내에서 해당 열에 해당하는 픽셀(pixel) 간의 밝기 차를 이용하여 밝기 차가 가장 큰 부분을 찾는 과정을 매 열마다 수행해서 찾아진 최대점들을 이용한 선 맞춤을 통하여 수평선을 추출한다. 따라서 수평선 추출 결과가 매우 안정적이고, 수평선 추출이 자동화되어있으므로 수백 프레임(frame)의 해상 장면 영상열에서도 수평선을 쉽게 추출할 수 있는 장점이 있다. 수평선, 추출, 관심, 영역, 가우시안, 콘트라스트
Abstract:
A method for estimating a 3D position of a human joint using a sphere projecting technique is provided to precisely estimate the 3D position of the joint in real-time by forming a virtual sphere placing the joint on surface, projecting a 2D image of an actuator on the virtual sphere, and estimating a point meeting the virtual sphere and the 2D image as the 3D position of the joint. A multi-view 2D image of the actuator is obtained by capturing marker-free motion of the actuator and 2D feature corresponding to en end-effector is extracted from the obtained multi-view 2D image(200). 3D coordinates of the end-effector are restored by performing 3D matching for the extracted 2D feature(202). A 3D blob of the end-effector is generated by using the restored 3D coordinates(204). The virtual sphere is generated by using a distance from a central point of the 3D blob to the joint as a radius and is projected on the multi-view 2D image of the actuator(210). The point meeting the virtual sphere and the multi-view 2D image of the actuator is searched and the 3D position corresponding to the searched point is estimated as the 3D position of the joint(212).
Abstract:
본 발명은 박막 자기 헤드의 제조방법에 관한 것으로, 특히 초미세 자기재생 소자를 제작함에 있어 포토 레지스트의 플로우 공정을 적용하여 하드 마그네트층과 금속다층박막 사이를 분리시킴과 아울러 포토 레지스트를 이용하여 상부전극과 하부전극 사이를 절연시킴으로써, 제조공정을 단순화, 최적화할 수 있을 뿐만 아니라 제조공정의 시간을 효과적으로 단축시킬 수 있는 박막 자기 헤드의 제조방법을 제공한다. 박막 자기 헤드, 하부전극, 포토 레지스트 패턴, 금속다층박막, 하드 마그네트층, 상부전극
Abstract:
본 발명은 LAN에서 정보보호 취약성 문제를 해결하기 위하여 암호 시스템을 이용한 새로운 정보보호 프로토콜을 개발한 것으로, 암호화 키의 사용 시간량을 지정하여 키를 지정된 시간만 사용할 수 있도록 하는 시간 제한(time quantum) 키 분배 방식을 제공함으로써 키가 노출되더라도 암호문의 일부만 해독이 가능하고 나머지 암호문은 해독할 수 없도록 하여 안전성을 높일 수 있고, 키 일치성(concurrency)을 보장하며, 사용자 인증을 효과적으로 지원할 수 있다는 장점이 있다. 또한, 상기 시간 제한(time quantum) 키 분배 방식을 기반으로 한 SP2 정보보호 프로토콜은 LLC와 MAC 사이에서 정보보호 기능을 수행하며, 정보보호가 필요한 경우에만 SP2 프로토콜을 수행하도록 함으로써, 정보보호 기능에 의한 LAN의 급격한 성능 저하를 방지할 수 있다는 효과가 있다.
Abstract:
A method and an apparatus for extracting a line segment are provided to obtain the line segment through weight based line fitting by using found pixels. A direction image and a slop image for each edge pixel from a canny girth image obtained from an inputted image are calculated(S204). Arbitrary two pixels of the girth pixels are selected to form a straight line. A line segment candidate pixel is selected through gradual pixel extension from a central point of the two pixels forming the straight line. After performing weight based line fitting by calculating weight values of the selected line segment candidate pixels, a line segment is extracted by checking whether the line segment candidate pixels are connected or not.
Abstract:
An apparatus and a method for extracting a horizontal line are provided to obtain quite stable horizontal extraction results, and easily extract horizontal lines from ocean scene image sequences of hundreds of frames due to automating horizontal line extraction. An interested region extracting unit(18) extracts coordinates of an interested region selected from a still image corresponding to each frame of ocean scene video. A controller(20) acquires a horizontal line corresponding to line adjustment from the coordinates of the interested region of the still image. The still image is adjusted in its contrast and Gaussian-filtered. The contrast is adjusted based on previous settings, and adjusted under the control of the controller. The interested region extracting unit extracts the coordinates of the interested region of the first still image among still images corresponding to each frame.
Abstract:
A correlation extraction method for generating 3D motion data, a motion capture system for easily synthesizing a body-type character to a real background image by using the same, and a method therefor are provided to capture the 3D motion data capable of being accurately matched to a real background image photographing camera by obtaining a correlation between a fixed camera for motion capture and the real background image photographing camera. A correction frame calibrates positions of a motion capture fixed camera(103) and a real background photographing movable camera(101). The motion capture fixed camera photographs a corner point which exists in the correction frame and a background marker or a background, and captures the motion of operator. The real background photographing movable camera moves the position and photographs a real background. A motion capture processing unit(100) extracts a geometric correlation between the motion capture fixed camera and the real background photographing movable camera, and generates 3D motion data automatically matched to the real background.
Abstract:
A mouse interface device using a camera, a system and a method using the same, and a computer-readable recording medium thereof are provided to control a position of a mouse cursor in a screen without any additional device by using homography converting a coordinate system of a camera into a planar coordinate system of the screen. An image coordinate detecting module(310) detects image coordinates, which are positions of at least four points found on an edge of a screen from a camera image, from the screen captured by a camera(100). A homography processing module(320) finds homography by using the detected image coordinates and planar coordinates, which are the planar coordinates formed by the screen for the predetermined points. The homography comprises a 3X3 matrix converting a coordinate system of the camera into a planar coordinate system of the screen. A cursor coordinate outputting module(330) outputs screen coordinates for the predetermined point of the camera image by using the homography and determines the screen coordinates as the position of the cursor. A mouse driver(400) moves the position of the cursor according to a change of the determined coordinates.
Abstract:
PURPOSE: A resource allocation method in a wireless network is provided to adaptively allocate resources according to the conversion of topology in each node. CONSTITUTION: When a node is added to existed topology, the node receives a beacon message from a neighbor node(S800,S810). The node competes with the neighbor nodes for reserving a beacon slot(S820). When a collision is generated, the node notifies the collision during a beacon transmission section(S830,S840). When the collision is not generated, the node selects the beacon slot(S850). The node notifies the selected beacon slot to one hop neighbor node(S860).
Abstract:
PURPOSE: A topology control method in a wireless network is provided to simultaneously reduce the energy consumption and interference of a node by determining optimal transmission power by determining the optimal number of neighbor nodes. CONSTITUTION: Interference for interference nodes is calculated using present transmission power(S1050). A candidate neighbor node is selected from a candidate neighbor node group according to a distance(S1060). Candidate transmission power satisfied with a target SINR(Signal-to-Interference plus Noise Ratio) of the candidate neighbor node is allocated to the node(S1070). Interference generated by the candidate transmission power for an interference node is calculated(S1080). When a formula(Iic >= Ii) is satisfied, the node is included in the candidate neighbor node group(S1090,S1100).