Abstract:
본 발명은 실시간 카메라 트래킹을 이용한 실사 영상 합성 시스템 및 그 방법에 관한 것으로, 2차원 특징점 추적 데이터에서 적합한 특징점들을 선별하여 상태(state) 예측기를 통해 카메라의 위치, 각도를 실시간으로 예측할 수 있다. 그리고 특징점들을 3차원으로 복원시킨 공간좌표를 DB의 도심 모델정보와 비교하여 도심모델 공간의 절대좌표계에서 카메라의 위치와 각도를 실시간으로 추정함으로써, 차량용 네비게이터에서 길안내 및 주변정보를 실사영상과 실시간으로 합성하여 출력할 수 있어 정확도와 실시간성을 보장할 수 있다. 합성, 카메라, 움직임, 예측
Abstract:
A method and a device for estimating motion in a real-time motion estimation system by using a Kalman filter are provided to improve correctness of a camera motion estimation value by updating configuration while increasing a state vector of the Kalman filter according to an extracted feature point. A feature extractor(102) extracts features of each frame from an image sequence of an image captured and received from a camera. A candidate feature selecting and storing unit(104) compares the extracted features with a current state vector. The candidate feature selecting and storing unit selects a candidate feature to be added and stores the candidate feature in a structure body. A state vector updater(106) updates the state vector when a predetermined condition is satisfied. A motion estimator(108) estimates motion of the camera in real-time by applying a Kalman filter to the updated state vector.
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 public key generating method is provided to be capable of stably maintaining groups and keys by utilizing discrete logarithm problem(DLP) using automorphism of finite non abelian groups. CONSTITUTION: A public key generating method comprises selecting a prime-number value(p)(S11), selecting finite non abelian groups(G)(S12), selecting a generator of the finite non abelian groups(G), selecting a group(g) being large prime number(p) when a selected generator is a center group(S13), calculating inner automorphism(Inn(g)) for a given group(S14), and establishing the first integer(a) less than the prime-number value(p) as a secret number(S15, S16), wherein a public key is established by the second public key(Inn(g)) using the inner automorphism and the secret key(a).
Abstract:
3D 프린터와 3D 스캐너가일체화된 3D 복합기및 그동작방법이개시된다. 본발명에따른 3D 복합기는객체를 3D 프린팅하기위한재료를분사하는노즐을포함하는프린팅부, 스캔대상객체에광을조사하는광 조사모듈과상기스캔대상객체를촬영하는카메라를포함하는스캐닝부, 상기프린팅부및 상기스캐닝부를 X축및 Y축방향으로이동시키는헤드부, 상기스캔대상객체를위치시키거나, 상기노즐로부터분사되는상기재료를적층시키며, Z축방향으로이동하는베드판, 그리고 3D 스캐닝기능또는 3D 프린팅기능중에서사용할기능의종류를설정하고, 상기설정된기능의종류에대응되도록상기스캐닝부또는상기프린팅부를제어하며, 상기헤드부및 베드판의이동을제어하는제어부를포함하며, 상기프린팅부및 상기스캐닝부는상기헤드부를통하여연결된구조이다.
Abstract:
멀티카메라들에대한캘리브레이션을위한방법및 장치가제공된다. 제1 거울및 제2 거울은서로마주보도록배치될수 있다. 물체는제1 거울및 제2 거울사이에배치되고, 멀티카메라들도제1 거울및 제2 거울사이에배치된다. 제1 거울및 제2 거울에의한반사를통해제2 거울에맺혀진물체의상을사용하여멀티카메라들에대한캘리브레이션이수행된다.