Abstract: A hologram generation and streaming method and system using multi-PCs are provided. A hologram streaming service system according to an embodiment of the present invention comprises: a hologram generation server for generating a hologram streaming image by using multiple computers; and a hologram player for playing the hologram streaming image generated in the hologram generating server. Therefore, distributed processing of the multi-PCs is used to generate a hologram at high speed so that a service can be streamed without delay in real time even for a high-resolution hologram.

Abstract: Provided are a method and a system for solving a tolerance problem which may occur in a slicing quantization (staircase effect) process of 3D printing which slices a 3D model and laminates layers one by one. According to an embodiment of the present disclosure, a 3D model slicing method includes the steps of: receiving, by a 3D model slicing system, an input of data of a 3D model to 3D print; examining, by the 3D model slicing system, a dimension of a layer thickness of the inputted 3D model; correcting, by the 3D model slicing system, a size of a layer for slicing, based on a result of the examining; and slicing, by the 3D model slicing system, the corrected 3D model. Accordingly, by preserving a dimension within a layer thickness, a problem that a concavo-convex portion is lost in a slicing quantization process of 3D printing according to a slicing position within a layer thickness, and a tolerance occurs is solved.

Abstract: A system for foreign object detection (FOD) in wireless power transfer is proposed. The system may include a balanced coil which is disposed between a transmitter coil and a receiver coil and which includes a Maxwell bridge circuit. The system may also include a temperature sensor configured to measure a temperature of the transmitter coil. The system may further include a processor configured to determine whether an FO is present between the transmitter coil and the receiver coil on the basis of voltage values detected at both ends of the bridge circuit. The FOD system can recognize the FO by finding a maximum resonant frequency at which a metal reacts using resonant frequency sweeping in a bridge circuit.

Abstract: An edge server for providing a virtual reality (VR) image is proposed. The server may include a rendering synchronization unit synchronizing a visual field and a margin with a virtual reality device. The server may also include a rendering unit generating a rendered image by rendering a visual field area corresponding to the visual field and a margin area corresponding to the margin based on a rotation center in an entire virtual reality image. The server may further include an encoding unit generating a reduced margin area by dividing a resolution of the margin area by a scaling factor, and encoding the visual field area and the reduced margin area to generate a split virtual reality image including the encoded visual field area and the encoded reduced margin area. The server may further include a streaming transmission unit transmitting the split virtual reality image to the virtual reality device.

Abstract: There are provided a method and a system for automatically generating a back-channel in an interactive agent system. According to an embodiment of the disclosure, an automatic back-channel generation method includes: predicting a back-channel by analyzing an utterance of a user inputted in a back-channel prediction model; and generating the predicted back-channel, and the back-channel prediction model is an AI model that is trained to predict a back-channel to express from the utterance of the user. Accordingly, a back-channel is automatically generated by utilizing a back-channel prediction module which is based on a language model, so that a natural dialogue interaction with a user may be implemented in an interactive agent system, and quality of a dialogue service provided to a user may be enhanced.

Abstract: A device and method for performing fast grid-based refining segmentation (FGRS) for video-based point cloud compression (V-PCC) is proposed. The method may include dividing a space of a three-dimensional (3D) point cloud into multiple grids to derive multiple voxels, searching for filled voxels including one or more points, searching for surrounding voxels which are filled voxels within a certain radius from each of the filled voxels, and searching for edge voxels which are present at a segment edge among all the filled voxels. The method may also include calculating smooth scores for surrounding voxels of each edge voxel and calculating a smooth score sum which is a smooth score for the edge voxel on the basis of the smooth scores of the surrounding voxels of the edge voxel, and updating a projection plane index (PPI) for each individual point in the edge voxel using the calculated smooth score sum.

Abstract: Provided is a method for filtering driving paths in order to stably track a path which is generated for various purposes, such as recognizing a lane and keeping or changing the lane, or avoiding an obstacle around a road. A driving path filtering system according to an embodiment of the present disclosure includes: a position recognition unit configured to recognize a position of a vehicle; a lane recognition unit configured to recognize a lane of a road; and a path generator configured to generate a path for the vehicle to travel on, based on a result of recognizing the position and a result of recognizing the lane, and to perform path noise filtering with respect to the generated path. Accordingly, a driving path can be stabilized by removing a path noise (error) by complementally filtering a lane recognition-based path generation method and a map-based path generation method according to a driving environment.

Abstract: There is provided a conversation method and system for operating a conversation model according to the presence or absence of related knowledge. A conversation method according to an embodiment may receive an input of a user utterance, may determine a conversation model based on an inputted user utterance content, may create a conversation content by using the determined conversation model, and may convert the created conversation content into a voice, and may output the voice. Accordingly, different conversation models may be operated according to the presence or absence of related knowledge, so that an empathic conversation may be generated instead of generating an inappropriate response in a knowledge-based conversation, and user's satisfaction on a conversation may be enhanced.

Abstract: This application relates to an apparatus and method for providing a wrap-around view based on three-dimensional (3D) distance information. The apparatus may include a camera module, a sensor module, and a controller. The camera module acquires image information in all directions, and the sensor module measures 3D spatial information in all directions. The controller is configured to generate 3D distance information by projecting the measured 3D spatial information onto a two-dimensional (2D) plane, to generate a 3D model in a 3D space by using the generated 3D distance information, and to generate a wrap-around view by mapping the acquired image information to the generated 3D model.

Abstract: Provided is a hologram printing method and apparatus using a hologram medium light efficiency map. A hologram printing method according to an embodiment emits a laser to a hologram medium, acquires an image by photographing light diffracted from the hologram medium, generates a light efficiency map of the hologram medium from the acquired image, and records hogels on the hologram medium by referring to the generated light efficiency maps of the hologram medium. Accordingly, light efficiency is measured on each hogel area, and hologram printing is performed by adjusting an intensity of a laser of each wavelength according to a hogel, so that uniformity of luminance and color of a hologram printing result can be enhanced.

Abstract: There is provided an object attribute-based watermarking method for preventing leakage of a digital content. A video watermarking method according to an embodiment may acquire a requested video and watermarking information upon receiving a request for video streaming from a user, may determine some of objects appearing in the video according to the watermarking information, may transform attributes of the determined objects, and may stream the transformed video. Accordingly, by watermarking an attribute of an object appearing in a video differently according to a user and providing the video, a watermark may be difficult to perceive, robustness against various attacks may be guaranteed, and a leakage path of a content may be checked.

Abstract: There is provided a thin optical system for real-world occlusion in an augmented reality display. The optical system according to an embodiment includes: a first DCRA configured to reflect light beams focused on holes; a mask positioned on a light emitting surface of the first DCRA to pass or block the light beams emitted from the first DCRA; and a second DCRA configured to reflect the light beams which are focused on holes after passing through the mask. Accordingly, the optical system can implement real-world occlusion in the unit of pixel while having a thin form factor.

Abstract: There is provided a learning method and system of a backbone network for visual intelligence based on self-supervised learning and multi-head. A network learning system according to an embodiment generates a plurality of first modified vectors by modifying a first feature vector outputted from a teacher network, generates a plurality of second modified vectors by modifying a second feature vector outputted from a student network, calculates a loss by using the first modified vectors and the second modified vectors, and optimizes parameters of the student network. Accordingly, the effect of learning by knowledge distillation may be enhanced by training the backbone network for visual intelligence like group learning is performed by various teacher networks and student networks.

Abstract: A sensor includes a base material and a through-hole formed to pass through the upper surface and the lower surface of the base material. The sensor may also include a conductive thread sensor including conductive thread that passes through the through-hole. The pressure sensor is implemented through a structural combination of the conductive thread and the base material so that the degree of design freedom can be effectively increased in the application of a variety of recent wearable flexible materials.

Abstract: There are provided a method and a system for selecting an optimal synchronization broker for each workload. A system for selecting an optimal synchronization broker for each workload according to an embodiment includes: a storage unit including a database that contains specialist recommendation information including information on a correct protocol that is recommended by a specialist with respect to a service specification and data transmission requirements; and a processor configured to determine an optimal in-bound protocol and an optimal out-bound protocol according to the data transmission requirements through a decision tree model that is trained by using the specialist recommendation information as training data.

Abstract: There is provided a data interworking method between a oneM2M system and an NGSI-LD system. The data interworking method according to an embodiment of the present disclosure includes: retrieving, by an IPE, resources in the oneM2M system that perform data interworking with the NGSI-LD system; retrieving labels of the retrieved resources; acquiring a mapping-rule from the retrieved labels; and storing the acquired mapping-rule. Accordingly, data interworking between data platforms using different standards is performed more easily, so that technology may go one step further to the goal of interconnecting and servicing all things in a global environment as IoT ultimately pursues.

Abstract: The present invention relates to an image inpainting apparatus and an image inpainting method, the image inpainting apparatus including: a background inpainting part configured to generate a background-inpainted image by carrying out inpainting on a background with respect to an input image in which a region to be inpainted is set up; an object inpainting part configured to generate an object image by carrying out inpainting on an object; and an image overlapping part configured to generate an output image by causing the background-inpainted image and the object image, which are generated, to overlap each other.

Abstract: A bio sensor using a FET element and an extended gate, and an operating method thereof are disclosed. A biosensor using a field effect transistor (FET) device and an extended gate electrode according to the present invention is characterized by comprising: an extended gate electrode connected to the FET element; a sensing electrode made of the same material as the extended gate electrode and on which a receptor antibody selectively recognizing a target molecule is fixed; and a reference electrode that maintains a constant potential and is selectively connected to the sensing electrode.

Abstract: There is provided a method for determining road conditions by sharing sensor data and object recognition results in a V2X communication environment. According to an embodiment, a road condition determination method may acquire sensor data, may recognize objects by analyzing the acquired sensor data, may receive sensor data and object recognition results from external terminals, may determine reliability on the received object recognition results and sensor data, and may determine road conditions, based on the acquired sensor data and object recognition results and object recognition results and sensor data which are given reliability.

Abstract: There is provided a temperature data-based gas usage correction method for a gas data platform. According to an embodiment, an energy usage correction method may collect gas meter reading data, may calculate energy usage based on the gas meter reading data, may collect temperature data, and may correcting the calculated energy usage. Accordingly, when it is impossible to obtain temperature in reading a gas meter, temperature compensation may be performed by linking temperature data collected separately and gas usage, and gas usage may be more exactly measured by correcting gas usage by compensating for temperature variation caused by a difference in seasons, installation regions in a gas data platform.