Electronics and Telecommunications Research Institute

Jun Seong Bang

Kyeong Hwan Doo

Dong Chun Lee

Sang Soo Lee

Hun Joo Lee

The present invention relates to a method and an apparatus for performing image feature matching in a SLAM-based camera and, more particularly, to a method and an apparatus for improving the performance and speed of feature matching by generating labeled keyframes including GPS information, receiving limited promising keyframes on the basis of the labeled keyframes, and applying weighted grid to perform image feature matching.

Method and apparatus for performing image feature matching using labeled keyframes in SLAM-based camera tracking

Provided is a user authentication method using a natural gesture input. The user authentication method includes recognizing a plurality of natural gesture inputs from image data of a user, determining number of the plurality of natural gesture inputs as total number of authentication steps, determining a reference ratio representing a ratio of number of authentication steps requiring authentication pass to the total number of the authentication steps, determining an actual ratio representing a ratio of number of authentication steps, where authentication has actually passed, to the total number of the authentication steps, and performing authentication on the user, based on a result obtained by comparing the actual ratio and the reference ratio.

System and method for authenticating user

Provided is a method and system for integrating multiple image markers to generate a single integral image marker for configuring content such as game content. The present invention proposes a method of expressing, in a global coordinate system, feature points for each image marker whose positions are expressed in their local coordinate system by calculating relative positions of the image markers and applying the calculated relative positions to the image makers other than a reference image maker to transform 3D positions of feature points in each image marker.

Method and system for generating integral image marker

Provided are an Optical Network Unit (ONU) for low latency packet transmission in a Time Division Multiplexing-Passive Optical Network (TDM-PON), a method of operating the ONU, and an apparatus for controlling the ONU. The method includes: receiving, from a base station, first bandwidth allocation information regarding a bandwidth allocated by the base station to a terminal for uplink packet transmission; and transmitting a bandwidth allocation request, which is based on the received first bandwidth allocation information, to an Optical Line Terminal (OLT) before completing packet reception from the base station.

Optical network unit (ONU) for low latency packet transmission in time division multiplexing-passive optical network (TDM-PON), method of operating the same, and apparatus for controlling ONU

A method of registering or de-registering, by an optical line terminal (OLT), one or more optical network units (ONUs) in an optical communications network. The method may include: setting one or more sub-channels for registration or de-registration among two or more sub-channels, and a size of a contention window in the one or more sub-channels; transmitting, to one or more ONUs, a registration information message including information of the one or more set sub-channels and the size of the contention window; receiving, through one of the set sub-channels, a registration or de-registration request message from the one or more ONUs, which receive the registration information message; and registering and de-registering the one or more ONUs.

Apparatus and method for registering and de-registering optical network unit (ONU) by using plurality of sub-channels in optical communications network

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Daejeon, South Korea

Jun Seong Bang