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公开(公告)号：US20230367261A1
公开(公告)日：2023-11-16
申请号：US18030093
申请日：2020-12-02
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee HONG , Young Min KIM , Ji Soo HONG , Jin Soo JEONG
IPC: G03H1/04
CPC classification number: G03H1/0476 , G03H2223/53
Abstract: Provided are a holographic printing device and method using multiple optical heads. The holographic printing device according to an embodiment of the present invention comprises: a fringe pattern generation unit which generates a holographic fringe pattern, and segments the generated fringe pattern into hogels; a multiplexing unit which groups the hogels, segmented by the fringe pattern generation unit, according to area; and a plurality of optical heads which respectively receive the grouped hogels and print the respective hogels in the corresponding areas of a holographic medium. Accordingly, several hogels can be printed on the holographic medium at a time using the multiple optical heads, thus reducing holographic printing time so that even large screen holograms can be printed at high speed.
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12.发明申请公开(公告)号：US20230004121A1
公开(公告)日：2023-01-05
申请号：US17781101
申请日：2019-12-06
Applicant: Korea Electronics Technology Institute
Inventor： Ji Soo HONG , Sung Hee HONG , Young Min KIM
Abstract: Provided is a technology for implementing an AR optical waveguide display capable of showing a hologram image by means of a small and simple system configuration by using an HOE. A holographic display according to an embodiment of the present invention comprises: a light source module for emitting a beam; an optical waveguide through which the emitted beam is incident and propagated; a plurality of holographic optical elements (HOES) for propagating the beam incident to the optical waveguide inside the optical waveguide while totally reflecting the beam; and a modulator for reproducing a holographic image through the progressing beam and propagating the beam to the inside of the optical waveguide while totally reflecting the beam. Accordingly, it is possible to implement, as a small and simple system, an optical waveguide display showing an AR hologram by using an optical waveguide and an HOE.
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公开(公告)号：US20220365483A1
公开(公告)日：2022-11-17
申请号：US17621890
申请日：2020-12-02
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee HONG , Young Min KIM , Ji Soo HONG , Jin Soo JEONG
IPC: G03H1/04
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.
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公开(公告)号：US20250029282A1
公开(公告)日：2025-01-23
申请号：US18713730
申请日：2021-12-06
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee HONG , Young Min KIM , Ji Soo HONG
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.
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公开(公告)号：US20240397167A1
公开(公告)日：2024-11-28
申请号：US18344065
申请日：2023-06-29
Applicant: Korea Electronics Technology Institute
Inventor： Ji Soo HONG , Sung Hee HONG , Young Min KIM , Jin Soo JEONG , Yong Hwa KIM , Byoung Hyo LEE , Hyeon Chan OH
IPC: H04N21/8358 , H04N21/234 , H04N21/239 , H04N21/24
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.
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Patent Agency Ranking
16.发明公开公开(公告)号：US20240119673A1
公开(公告)日：2024-04-11
申请号：US18013317
申请日：2021-12-15
Applicant: Korea Electronics Technology Institute
Inventor： Ji Soo HONG , Sung Hee HONG , Young Min KIM , Jin Soo JEONG , Byoung Hyo LEE
CPC classification number: G06T19/00 , G03H1/2294 , G06T3/403 , G06T2200/24 , G06T2210/36
Abstract: Provided is a cognitive experiment method for change in periphery region image quality for parameter determination of a foveated hologram. According to an embodiment, a cognitive experiment method for determining foveated image parameters includes: generating a foveated image which includes a foveal region and a periphery region while reducing image quality regarding the periphery region; displaying the generated foveated image; receiving an input of a response to image quality of the periphery region from a subject; and collecting information regarding appropriate image quality of the periphery region, based on the response inputted by the subject. Accordingly, in applying a foveated hologram generation algorithm for real-time reproduction, various parameters such as a boundary between a foveal region image and a periphery region image in a foveated hologram, and a degree of quality degradation of the periphery region image may be appropriately determined through a cognitive experiment.
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公开(公告)号：US20230245259A1
公开(公告)日：2023-08-03
申请号：US17768528
申请日：2019-10-15
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee HONG , Young Min KIM , Ji Soo HONG
CPC classification number: G06T1/0021 , H04N1/3224 , G06T2201/0051
Abstract: Provided is a method for inserting a copyright information indication as a means for protecting the copyright of LF content which can be played back as multi-viewpoint images, wherein the copyright information indication is only inserted in images of a specific viewpoint. A method for generating multi-viewpoint images according to an embodiment of the present invention includes the steps of: generating multi-viewpoint images; inserting a specific information indication in images of a specific viewpoint among the generated multi-viewpoint images; and storing the multi-viewpoint images in which the specific information indication has been inserted. Accordingly, the copyright of LF content, which are expensive multi-viewpoint images, can be protected by inserting the copyright information indication only in the images of the specific viewpoint.
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公开(公告)号：US20230047713A1
公开(公告)日：2023-02-16
申请号：US17622952
申请日：2020-12-02
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee HONG , Young Min KIM , Ji Soo HONG , Jin Soo JEONG
Abstract: Provided are a method and an apparatus for printing a hologram by using a mask. The hologram printing method according to an embodiment generates a hologram fringe pattern, splits the hologram fringe pattern on a hogel basis, generates the split hogels, masks a part of the generated hogel, and prints the masked hogel on a hologram medium. Accordingly, an empty space which occurs between hogels when a hologram is printed is prevented from being generated by using a mask, so that a fill factor can be effectively enhanced, and eventually, image quality of a hologram can be enhanced.
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公开(公告)号：US20200051533A1
公开(公告)日：2020-02-13
申请号：US16339909
申请日：2016-10-07
Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
Inventor： Sung Hee HONG , Hoon Jong KANG , Choon Sung SHIN , Ji Soo HONG , Young Min KIM
Abstract: Provided are a system and a method for displaying content in association with a position of a projector. A method for displaying an image, according to one embodiment of the present invention, comprises identifying a position of an image output device, generating a partial image from a full image on the basis of the position of the image output device, and outputting the generated partial image by means of the image output device. As a result, since the image projected from the image output device changes in association with the position of the image output device, a more realistic AR/VR may be provided.
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20.发明申请公开(公告)号：US20170311164A1
公开(公告)日：2017-10-26
申请号：US15327375
申请日：2016-01-22
Applicant: Korea Electronics Technology Institute
Inventor： Choon Sung SHIN , Sung Hee HONG , Ji Soo HONG , Young Min KIM , Hoon Jong KANG , Young Choong PARK
CPC classification number: H04W12/12 , B29C67/00 , B33Y50/02 , B33Y80/00 , G01V15/00 , G06K9/0004 , G06K19/06159 , G06K19/10 , G06K19/14 , G06K2009/0059 , G06K2019/06243 , H04W12/06
Abstract: A method for inserting information into a 3D structure and recognizing information in a non-destructive method is provided. A 3D printing method according to an exemplary embodiment of the present invention includes: generating a tag having specific information recorded thereon to be inserted into a 3D structure, and printing the tag on the inside of the 3D structure while printing the 3D structure. Accordingly, since the tag having information recorded thereon is printed on the inside of the 3D structure when the 3D structure is printed by a 3D printer, it is impossible to forge/falsify information.
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