Abstract:
PURPOSE: An object recognition and posture assumption method of a robot is provided to efficiently discover the postures possible to occur around three dimensional lines by using three dimensional lines based on direction and relationship. CONSTITUTION: The object recognition and posture assuming method of robot is as follows. A prior first interpretation is propagated to a state space by using information about robot motions(S210). A probability distribution function of each posture candidate of an object is obtained based on the first evidence selected among obtained evidences(S220). The probability value [probability value] toward each posture candidate of the object material calculates based on 'the second evidence among the obtained evidence' (S230). The probability value for each posture candidates of the object is computed based on the second evidence among the obtained evidences(S230). The second interpretation is created based on probability distribution function and probability value (S240). Current first interpretation is created based on the propagated first and second interpretations(S250) and returns to the very stage for propagating to sate space of the first interpretation.
Abstract:
PURPOSE: A method for determining the boundary of an image using a structure optical pattern is provided to improve the accuracy of the boundary detection. CONSTITUTION: An image processing unit detects the boundary by using crossing of two signals in a graph if the reflectivity of the surface of object is constant(220,230). If the reflectivity is not constant, the image processing unit calculates a reflection index(240). The image processing unit calculates an incoming light(250). The image processing unit finds a cross point between the graph of an incoming light intensity corresponding to a captured signal pattern image and the graph of the incoming light intensity corresponding to the captured reverse signal pattern image. The image processing unit detects the boundary by the cross point(260).
Abstract:
정전기장 유도 방식을 이용하는 멀티 노즐 잉크젯 프린트 헤드가 개시된다. 본 발명의 일 실시예에 따른 잉크젯 프린트 헤드는, 상기 노즐 마다에 형성되는 제1 전극; 및 상기 노즐과 이격된 측면에 위치하여 이웃한 어느 2개의 노즐 사이 마다를 가로막는 형태로 배치되며, 상기 제1 전극과의 사이에서 전위차를 형성함으로써 상기 노즐로부터 잉크를 토출시키기 위한 정전기장을 유도하는 제2 전극을 포함할 수 있다. 본 발명의 실시예에 의하면, 인접 노즐 간 전계 간섭을 차폐함으로써 크로스토크 현상을 방지할 수 있는 효과가 있다. 잉크젯 프린트 헤드, 정전기장 유도 방식, 멀티 노즐, 크로스토크.
Abstract:
PURPOSE: A pose real-time estimation method of an object is provided to estimate a pose according to an image and track the object. CONSTITUTION: An object pose real-time estimation system receives an image that an object is photographed(S210). The system extracts a corner point from the inputted image(S220). In case the corner point is newly offered, the system corrects the corner point as time required to the obtainment of the corner point(S231,S232). According to the corrected corner point, the system estimates the pose of the object and tracks the object(S234).
Abstract:
본 발명은 정전기력을 이용한 잉크분사장치, 그 제조방법 및 잉크 공급방법에 관한 것으로, 제1기판 상면에 구비되는 노즐과 상기 노즐 내부에 위치하는 하부전극 및, 제1기판 하면에 구비되는 잉크 유입로가 일체로 형성된 하부 전극부; 제2기판의 상면에 형성되는 상부전극 및 제2기판의 하면으로부터 상기 상부전극까지 관통되어 형성된 잉크 토출공을 구비하는 상부 전극부; 및 상기 노즐과 잉크 토출공이 수직으로 정렬되도록 상기 하부 전극부와 상부 전극부를 본딩하는 접착층을 구비하여, 상기 잉크 유입로를 통해 노즐로 공급되는 잉크에 상기 하부전극과 상부전극 사이의 전위차에 의해 발생한 정전기력이 가해질 때 노즐 끝단에 메니스커스가 형성되어, 메니스커스 끝단에서 상부 전극부의 잉크 토출공을 통해 미소 액적 크기의 잉크가 토출되도록 이루어지는 것을 특징으로 한다. 이와 같은 구성을 구비함으로써, 잉크분사장치에서의 잉크 선정이 용이하고 정전기력의 집중 효율이 높으며 제조공정을 단순화할 수 있는 효과가 있다. 정전기력, 잉크분사, 잉크젯, 프린터헤드
Abstract:
동일해상도의 옥트리 구조에서의 주소검색방법이 개시된다. 주소 검색방법은 옥트리 구조 내의 각 셀에 옥트리 깊이 레벨에 따라 값이 증가되는 고유한 주소값을 부여하여, 옥트리 구조 내의 이웃하는 셀들간의 주소 차이값이 일정한 수열적 규칙성을 나타내도록 옥트리 셀들의 주소 인코딩을 실시하는 단계; 주소 인코딩된 각 옥트리 셀들의 주소 차이값이 갖는 수열적 규칙성을 이용하여, 선택된 옥트리 셀에 면으로 인접한 이웃셀들의 주소값을 찾아내는 단계를 포함한다. 본 발명에 따르면, 옥트리 셀에 이웃한 이웃셀들의 주소값을 효율적으로 검색할 수 있게 한다.. 동일해상도, 옥트리 구조, 이웃 셀, 주소검색
Abstract:
A self modeling method of a 3D rotating symmetrical object and an apparatus thereof are provided to grasp the whole shape of an object by estimating the geometric shape of the object from partial data. The main axis of a 3D point cloud is estimated(S10). The 3D point cloud is divided into 3D points belonging to each plane. The center points of each plane are obtained. A center point cloud is obtained(S20). An intrinsic vector having the biggest eigenvalue is selected as a new main axis(S30). When the previous main axis and new main axis exist within a threshold value, the new main axis is selected as the direction vector of the center axis of the 3D object(S42).
Abstract:
A 3D object or environment representation method based on a multi resolution octree structure are provided to prevent waste of an unnecessary octree cell and prevent increase of octree generation time. A size of an area that one point occupies in a real space is calculated by using a camera parameter(S102). Point density inside an octree cell is calculated by using the calculated size of the area and the number of points(S103). The calculated point density is compared with a predetermined threshold value(S104). When the point density is larger than the threshold value, an average value and a variance value of coordinates of points inside a corresponding octree cell are calculated(S105). Point distribution inside the octree cell is checked by using the calculated average value and variance value(S106). Whether to disassemble the octree cell is determined according to the distribution(S108).
Abstract:
A central information processing system and a method for a service robot having layered indoor information according to a recognition and reasoning level are provided to integrally manage information about an indoor space and objects therein in order to enable plural of service robots to share the indoor information by providing necessary indoor information to the service robots and receiving modified information from the service robots. A central information processing system and a method for a service robot includes a database(20), a broker unit, a spatial information manager(33), an object information manager(34), and a space & object reasoning unit(35). The broker unit includes at least one of interfaces(31) corresponding to each of the service robots. Each of the interfaces analyzes an information request of a corresponding robot, transforms a format of the requested information to a predetermined robot-readable format, and transmits the transformed information to the robot. The interface analyzes an information request from a corresponding service robot and transforms a format of the received information request to a predetermined format that can be processed in the central information processing system. On the contrary, the interface receives a result of the information request from the central information processing system and transforms a format of the result to a predetermined format analyzable by the service robot. The spatial information manager and the object information manager hierarchically compose information about an indoor space and objects therein according to a recognition/reasoning level and stores the layered information.
Abstract:
A method and a system for structural light based depth imaging using a geometric condition are provided to correct distorted information by removing or correcting a corresponding point error between projectors and imaging devices. A method for structural light based depth imaging using a geometric condition comprises a step of detecting, removing, or correcting a corresponding point error between plural projectors and imaging devices, which is caused by reflection and blur, by using a geometric condition between the projectors and the imaging devices.